Mussel-inspired polydopamine (PDA) coatings exhibit exceptional adhesion and multifunctionality but face challenges in controlled degradation for substrate reutilization and environmental sustainability. Herein, we report a green and efficient ozone-driven strategy for the degradation of PDA particles and delamination of PDA coatings. Ozone effectively degrades PDA particles through sequential disruption of non-covalent interactions and covalent bonds, inducing progressive decolorization, particle size reduction, and a substantial decrease in total organic carbon (TOC) via conversion into water-soluble small molecules and inorganic species. Ozone-mediated delamination of PDA coatings is both efficient and controllable: by modulating ozone concentration, pH, and treatment duration, we achieve either precisely controlled coating thinning or complete removal. This delamination process demonstrates universal applicability across diverse substrates, enabling efficient substrate recycling with minimal residual water-soluble fragments and confirming environmental compatibility. A three-synergistic-mechanism model for ozone-induced PDA coating delamination is proposed, involving disruption of non-covalent interaction networks, attack on catechol/quinone moieties and unsaturated bonds, and interfacial weakening through oxidation of adhesion-promoting functional groups. The proposed method offers a novel, efficient, and universal strategy for the controlled removal of PDA coatings, as well as the fabrication of ultrasmooth PDA surfaces and PDA-derived patterns via a “top-down” approach.

Realizing high-energy, long-life lithium-ion batteries necessitates anodes that surpass the 372 mAh g-1 limit of graphite while enduring cyclic volume variations. Silicon, with its theoretical capacity of 3579 mAh g-1, is the ideal candidate; however, its dramatic volume change leads to pulverization and capacity degradation. In this study, we introduced a straightforward self-templating technique for producing silicon/carbon (Si/C) hybrid nanotubes (SiCNTs) by leveraging the Kirkendall effect. Instead of isolating silicon within a rigid shell, our method iteratively nucleated and fused silicon and carbon at the nanoscale, resulting in an interpenetrating, electron-percolating scaffold with a hollow channel. The interior of the tubes accommodates radial expansion without compromising the integrity of the outer carbon lattice, while the intimate Si-C contact reduces Li+ diffusion distances and enhances interfacial conductivity. Consequently, the anode maintains a capacity of 1078 mAh g-1 after 700 cycles at 1 A g-1 and delivers 1114 mAh g-1 at 7 A g-1 after 170 cycles-performance metrics that highlight the synergy between the Kirkendall-interlocked architecture and tubular buffering.

Fast-charging lithium metal batteries require electrolytes that can sustain high Li+ flux while maintaining stable interphases. Here we demonstrate an interpenetrating dual-network quasi-solid polymer electrolyte that couples a continuous ion-conduction network with a lightly crosslinked polar framework to create a competitive-coordination environment. Multi-site polymer coordination regulates anion participation in the Li+ solvation sheath, suppressing Li+–anion contact ion pairs and lowering the apparent migration barrier without sacrificing carrier concentration. Meanwhile, the lightly crosslinked framework provides additional structural constraint relative to uncrosslinked PDOL, helping to homogenize ion-flux distribution and stabilize the solid electrolyte interphase (SEI), enabling reversible Li plating/stripping under high-rate operation. The electrolyte delivers an ionic conductivity of 3.3 × 10−3 S cm−1 at room temperature, a high average Li+ transference number (tLi+) of 0.79, and oxidative stability up to 5.1 V. Li‖Li symmetric cells cycle stably for 900 h at 0.2 mA cm−2, and LFP‖Li full cells retain 84.3% capacity after 1000 cycles at 1C and maintain 80.7% retention after 810 cycles at 10C (up to 121.9 mAh g−1). This work highlights competitive-coordination dual-network engineering as an effective route to fast-charging solid-state lithium metal batteries.

Ion-conductive elastomers are pivotal for next-generation intelligent systems, yet their practical deployment is hindered by limited environmental stability, poor interfacial adaptability, and lack of self-healing capability. We report a solvent-free poly(ionic liquid) elastomer (PILE) synthesized via ternary copolymerization. The PILE exhibits a unique dynamic interfacial adaptation mechanism: fluorinated segments spontaneously enrich the surface to form a hydrophobic layer in air, while upon substrate contact, it autonomously reconfigures its interfacial composition, recruiting polar or fluorinated groups to enable robust adhesion to hydrophilic or hydrophobic surfaces, even underwater. Concurrently, the material features a dynamic network reinforced by ion-dipole interactions between imidazolium cations and -CF3 groups, serving as reversible sacrificial bonds. This design achieves an optimal balance between mechanical strength (tensile strength similar to 550 kPa) and ultrahigh stretchability (similar to 1737% elongation), while enabling efficient room-temperature self-healing (98.9% recovery in 18 h). The hydrophobic PILE demonstrates exceptional environmental tolerance, with minimal weight loss (0.29% after 7 days) and negligible swelling, while maintaining stable ionic conductivity across a broad temperature range (3.58 & times; 10(-2) to 1.74 & times; 10(-1) S & centerdot;m(-1), 20-120 degrees C). The transparent elastomer (transmittance > 92%) functions as a durable strain/temperature sensor with reliable underwater performance, demonstrating a versatile design strategy for multifunctional ionic devices in soft robotics and wearable electronics.

Bismuth oxide, with its large internal spaces and adjustable structures, is a promising electrode material for zinc-ion batteries (ZIBs). However, its application is limited by poor reversibility and rapid capacity fading in neutral zinc-ion electrolytes. Here, we introduce selenium into bismuth oxide using chemical vapor deposition, precisely controlling the Se content by adjusting the gas flow rate. The Se-doped materials, particularly CC/Bi2O2.5Se0.5 and CC/Bi2O2Se, exhibit significant improvements in specific capacity and cycling stability. CC/Bi2O2Se achieves a maximum specific capacity of 312.5 mAh g-1 at 0.1 A g-1, with a retention rate of 74.6 % after 4000 cycles at 2 A g-1. The enhanced performance is attributed to the narrowed band gap and improved electrical conductivity resulting from Se doping, which facilitates electron and ion transport. More importantly, Se incorporation mitigates the formation of detrimental by-products, ensuring more reversible and efficient Zn-ion storage. It also stabilizes the Bi3+<-> Bi degrees conversion pathway observed during cycling, providing a metal-centered rationale for the improved reversibility. This work highlights the importance of electronic structure regulation in optimizing the performance of metal oxide electrodes and provides valuable insights for the rational design of highperformance energy storage materials.

Introduction:An ultra-sensitive fluorescence sensing system was constructed for methyl parathion (MP) detection using oxidized polymer of levodopa (L-DOPA) as a novel fluorescent probe. Methods:L-DOPA was first polymerized under alkaline conditions to form black L-DOPA polymer (PDOPA), and then H2O2 was added to oxidize it to form oxidized polymer of L-DOPA (OPDOPA), which exhibits strong blue fluorescence. Based on the alkaline-catalyzed hydrolysis of MP and the inner filter effect (IFE) between its hydrolysis product p-nitrophenol (p-NP) and OPDOPA, the detection of MP was successfully achieved. Results:The OPDOPA fluorescence nanoprobe presents excellent selectivity and sensitivity for MP detection. A linear response was achieved from 0.5 to 30 µg/mL, and the limit of detection was determined to be 0.08 µg/mL. The fluorescence detection system was utilized for the determination of MP in potato and Codonopsis pilosula samples. For the actual analysis of the two sample matrices, the sensor exhibited recovery rates spanning 92.00%-106.42% and a relative standard deviation (RSD) of ≤5.83%. Discussion:In this study, a functional polymer material with excellent fluorescence properties was synthesized from L-DOPA and applied to the highly sensitive and selective detection of MP. This approach not only offers a novel strategy for the detection of organophosphorus pesticides but also substantially broadens the application horizon of functional polymer materials.

The rapid evolution of flexible wearable electronics necessitates efficient thermal management, driving the demand for materials that are not only thermally conductive but also electrically insulating and flexible. In this study, a thermal conductive composite with aligned filler structure was fabricated using catechol/tetraethylenepentamine (CAT-TEPA) surface-modified hexagonal boron nitride (h-BN) and mesophase pitch-based carbon fibers (MPCF) as fillers, and cellulose acetate butyrate (CAB) as the polymer matrix via evaporation self-assembly and hot-pressing. By optimizing the interface through CAT-TEPA modification and leveraging the long-range structural alignment of MPCF, an efficient thermal conduction network of h-BN sheets was formed. The composite containing 50 wt % total filler content (3 wt % MPCF) achieved an exceptional in-plane thermal conductivity of 21.75 W/mK, and a high volume resistivity of 1.5 x 1011 Omegacm. Furthermore, the material demonstrated remarkable flexibility, making it a promising candidate for thermal management applications in flexible electronics.

Compared to classic thermosets, the reprocessability of covalent adaptable networks (CANs) endowed by dynamic covalent bonds (DCBs) often comes at the expense of mechanical performance and thermomechanical stability. Herein, we report a "High Activity & Low Content" strategy for CANs to achieve superior thermomechanical stability, which is enabled by dynamic N-hydroxyphthalimide-urethane bonds (NUBs). The catalyst-free addition reaction between N-hydroxyphthalimides and isocyanates proceeds to a near-quantitative conversion within 2 h at room temperature in dimethyl sulfoxide, while the formed bonds dissociate even up to ~ 28% at 120 °C. The dual high activity, characterized by a high degree of dissociation and fast association kinetics, allows for an effective reduction in DCB content within CANs while preserving their dynamic characteristics. We incorporate only 5 mol% of dynamic units to develop poly(N-hydroxyphthalimide-urethanes) (PNU) networks. The "High Activity & Low Content" design endows PNUs with superior mechanical properties, exceptional crack tolerance, and remarkable mechanical stability at high temperatures. Furthermore, even with minimal DCB participation, the PNUs exhibit excellent reprocessability and mild degradability in neutral aqueous conditions. This study proposes a compelling strategy that enables CANs to achieve excellent reprocessability while retaining their mechanical strength and thermomechanical robustness-overcoming the traditional trade-off between these properties.

The cutting-edge two-dimensional (2D) materials have ignited substantial interest as a novel approach for pursuing high-performance electromagnetic interference (EMI) shielding. Here in this work, to uncover the mystery of borophene as an EMI shielding material, the X-band EMI shielding performance of borophene is explored for the first time through introducing borophene into MXene assemblies to construct highly deformable and editable freestanding films. It is expected that 2D layered boron, which boasts high theoretical carrier density, conductivity, magnetism, and high aspect ratio, can stand as a viable contender for integrating with MXene for effective EMI shielding. Indeed, experimental results show that with the incorporation of borophene and employing appropriate annealing techniques, the EMI shielding capacity and the electromagnetic-wave absorption performance of these hybrid films can be effectively enhanced as compared with pristine MXene film. This investigation initially reveals the X-band EMI shielding performance of borophene-based materials, expanding its potential utility in functional applications and providing a reference for the performance explorations of borophene.

Flexible pressure sensors that simultaneously achieve high sensitivity and a wide detection range are essential for advanced pressure sensing applications, but their realization remains challenging due to inherent structural trade-offs. Here, we present a flexible piezoresistive pressure sensor based on an interlocking microstructure fabricated by modulated corona electric field. By precisely regulating polydimethylsiloxane microstructures using mesh modulation and assembling complementary loose and dense layers into an interlocking microstructure, the sensor exhibits a balanced combination of high sensitivity, wide working range, low hysteresis, and excellent durability. Specifically, the device exhibits a sensitivity of 239.13 kPa1 at low pressures while maintaining stable sensing performance up to 170 kPa, enabling reliable pressure detection spanning from pascallevel acoustic vibrations to mechanical loads in the hundreds of kilopascals. Benefiting from this broad pressure adaptability, the sensor supports diverse applications, including physiological monitoring, motion tracking, robotic gripping, and posture recognition. Furthermore, when integrated with a soft-voting ensemble learning framework, the sensor enables handwriting recognition with an accuracy of 96.12%. This work provides a scalable microstructure engineering approach and establishes a high-performance pressure sensing platform, which holds great promise for applications in wearable electronics and intelligent human-machine interfaces.

To address the insufficient toughness of commercial bisphenol A epoxy resin (DGEBA/MXDA), an epoxy-terminated hyperbranched poly(arylene ether ketone) (O-HBP) was designed and synthesized, and its effects on the curing behavior, thermal/thermomechanical properties, and mechanical performance of epoxy resins were systematically investigated. First, a hydroxyl-terminated hyperbranched poly(arylene ether ketone) (HBP-OH) was obtained by the polycondensation of 2,4,6-tris(4-hydroxyphenyl) pyridine (HPP) with 4,4'-difluorobenzophenone (DFK), followed by grafting with ethylene glycol diglycidyl ether (EGDE) to yield O-HBP. Structural characterization by Fourier transforms infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (H-1-NMR) confirmed the successful construction of the target structure. Subsequently, O-HBP was incorporated into the DGEBA/MXDA system at different loadings (0 wt%-8 wt%). The results indicated that O-HBP reduced the apparent activation energy of curing. Rheological measurements showed that the modified systems maintained low viscosity at 30-90 degrees C and exhibited a rapid rise and subsequent stabilization of viscosity at 100-110 degrees C, indicating sufficient cure. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) demonstrated negligible impact on thermal stability, while the glass transition temperature (T-g) first increased and then decreased with loading, reaching a maximum of approximately 102.9 degrees C. Dynamic mechanical analysis (DMA) revealed that an appropriate amount of O-HBP significantly increased the initial storage modulus. Mechanical testing showed optimal overall performance at 4 wt%-6 wt% O-HBP: the maximum improvements in tensile strength, flexural strength, and impact strength were approximately 10.3%, 63.1%, and 177.6%, respectively. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) observations revealed pronounced pull-out features, shear-yield textures, and nanoscale phase separation of 30-100 nm, elucidating energy absorption and crack deflection/branching mechanisms. This work provides a structurally designable and easily processable hyperbranched polymer strategy for efficient toughening and processing optimization of epoxy resins.

As lithographic resolution improves, stochastic effects during the lithography process have become increasingly significant in influencing pattern quality. Compared to polymeric resists, Single-molecule resins (SMRs), also known as molecular glasses, exhibit potential for mitigating development stochasticity due to their smaller molecular size and monodisperse nature. This study aims to investigate the relationship between the core structure of SMRs and their lithographic stochastic effects. To this end, we designed a series of bisphenol-A-like SMRs with core structures of adamantane-diyl, isopropylidene and isopropylidene, namely AD-Boc, BPA-Boc, and PH-Boc. Performance evaluations revealed the ranking in terms of LER and contrast: AD-Boc > BPA-Boc > PH-Boc. Fourier-transform infrared spectroscopy (FTIR) and X-ray reflectivity (XRR) analyses demonstrated that AD-Boc exhibits the strongest capability to suppress acid diffusion. Furthermore, calculations of the critical deprotection ratio combined with surface energy measurements confirm that AD-Boc induces the least stochasticity during development. These two effects together account for the observed differences in final lithographic performance. This work elucidates how the core structure of SMRs modulates lithographic performance by controlling acid diffusion and development stochasticity, providing valuable insights for the design of next-generation photoresists.

Textile shaped supercapacitor (T-SC) with lightweight, flexible features and favorable electrochemical performance is highly satisfying in the areas of wearable system. Herein, hierarchical and porous Ti3C2Tx flakes modified nickel cobalt manganese trinary metal oxide (NCMO) @graphene (GNCMT) non-woven fabric was fabricated for flexible T-SC by multiple-process with wet-laid web method, hydrothermal route and dip-coating treatment. The interconnected and successive rGO staple provides conductive frameworks for fast electron transfer and porous structure causing large ion diffusion kinetics. Besides, NCMO particle endows rich redox sites and large pseudo-capacitance for textile-based electrode. More importantly, covering Ti3C2Tx flakes can prevent the structural collapse of NCMO particle and optimize interface architectures, causing high conductivity and good OH-adsorption ability, verifying by density functional theory (DFT) calculations. Thus, the GNCMT nonwoven fabric shows high areal capacitance of 675 mF cm-2 at 1 mA cm-2, favorable rate performance (433 mF cm-2 at 10 mA cm-2), and long-term cycling property (88.4 % capacitance retention after 10,000 cycling). Additionally, matching with rGO non-woven fabric, the T-SC presents large capacitance of 277 mF cm-2 at 1 mA cm-2, 85.6 % capacitance retention after 10,000 cycles, excellent mechanical endurance and outstanding ability of integration with electronics, demonstrating bright future in wearable system.

Paclobutrazol (PBZ) is widely used in agriculture, but its residues in medicinal herbs may compromise product safety and quality. In this work, a molecularly imprinted electrochemical sensor was developed for the determination of PBZ in Radix Angelicae Sinensis. The sensor integrates Angelica stalk-derived biochar as a sustainable porous carbon substrate with a molecularly imprinted layer rationally designed through a combined computational approach. Density functional theory (DFT) calculations (Dmol3 module) were employed to screen the optimal functional monomer (o-phenylenediamine), and Forcite molecular dynamics simulations were further applied to determine the ideal template-to-monomer ratio, ensuring high-affinity recognition cavity formation. A deep eutectic solvent was introduced as a green eluent for template removal. Under optimized conditions, the MIP/ASB/GCE sensor exhibited a linear response from 50 to 450 nM, with an LOD of 11.49 nM and an LOQ of 38.30 nM. The sensor showed acceptable selectivity, reproducibility, repeatability, and storage stability.Recovery tests in spiked Radix Angelicae Sinensis samples gave recoveries of 105.80-109.30%. These results indicate that the proposed sensor is applicable for PBZ monitoring in complex herbal matrices and that the integration of biomass-derived carbon, molecular simulation-assisted imprinting, and green elution chemistry provides a useful strategy for MIP-based electrochemical sensing.

The intrinsic modulus mismatch between carbon fiber (CF) and the PEEK matrix significantly reduces stress-transfer efficiency under low-velocity impact (LVI) load. This study addresses these limitations by constructing a gradient-modulus interphase using CNT-incorporated interfacial modifiers on ultra-thin CF tapes, effectively balancing in-plane mechanical performance and impact resistance. As a result, the optimal CF/PEEK-1.2 composites (1.2 wt% CNTs) exhibited an interlaminar shear strength (ILSS) of 109.9 MPa and a transverse tensile strength of 75.3 MPa, representing increases of 36.0 % and 20.1 %, respectively, compared with the unmodified composites. The in-plane mechanical properties included a flexural strength of 1073.0 MPa and a flexural modulus of 67.1 GPa, corresponding to increases of 52.6 % and 87.4 %, respectively. Additionally, the dissipated energy and compression-after-impact (CAI) strength reached 15.3 J and 250.8 MPa, with respective increases of 6.3 % and 20.1 %, respectively. The impact damage area was 39.5 mm2, reduced by ca. 12 %. The simultaneous enhancement of static mechanical properties and impact resistance is attributed to improved interfacial adhesion and the formation of a gradient-modulus interphase in the CF/PEEK composites. This work provides a foundation for simultaneous improvement in-plane mechanical performance and impact resistance through the design of a gradient-modulus interphase.

The behavior and fate of carbon during oxidation of iron-based materials remain poorly understood at the atomic scale, largely because these processes are difficult to probe experimentally under reactive conditions. Yet this knowledge gap is scientifically and technologically important, as carbon redistribution during oxidation can strongly influence catalyst stability, surface evolution, and high-temperature corrosion. An atomic-level understanding of carbon behavior is therefore essential for predicting material performance and degradation in reactive environments. Here, using a structurally well-defined iron carbide (Fe2C) thin film on Cu(100), we track carbon through the complete oxidation sequence with scanning tunnelling microscopy and X-ray photoelectron spectroscopy, temperature-programmed desorption and density functional theory. Carbon does not desorb as CO or CO2 during oxidation, as the total C 1s intensity is conserved while the speciation changes entirely. Oxygen arriving at the surface displaces surface carbide carbon into the subsurface iron layers; continued oxidation ultimately expels it to the buried Fe/Cu interface, where graphitic C-C bonding develops. DFT shows that coadsorbed oxygen lowers the surface-to-subsurface carbon migration barrier from 1.65 to 0.9 eV, a roughly 7-order-of-magnitude rate enhancement at 550 K. These results connect oxide formation, carbon expulsion, and interfacial carbon accumulation in a single mechanistic framework for iron carbide oxidation.

The deterministic interfacial functionalization of chemically inert macroscopic polymers, such as ultrahigh-molecular-weight polyethylene (UHMWPE), represents a formidable challenge due to the inherent trade-off between superficial modification and bulk-destructive penetration. Herein, a non-destructive, three-dimensional synchrotron microlithography platform is reported, enabling the multimodal functionalization of inert polymers via spatiotemporal radical engineering. Utilizing high-flux hard X-ray microbeams, high-density radical channels are deterministically inscribed into the polymer matrix without physical masks. Crucially, in-situ small/wide-angle X-ray scattering (SAXS/WAXS) confirms that this extreme-energy deposition completely preserves the underlying semi-crystalline architecture. By harnessing the spatiotemporal evolution of these radiation-induced radicals, two distinct functionalization pathways are demonstrated. Instantaneously, surface-accessible radicals initiate localized graft copolymerization, establishing a hydrogen-bonded “molecular hook-and-loop” interface that anchors a flexible hydrogel sensor capable of withstanding severe dynamic deformation (700 cycles) without delamination. Subsequently, via a proposed “trap-and-reduce” mechanism, long-lived radicals deeply seated within the robust crystalline domains slowly migrate to the interface, spontaneously reducing chelated ions into site-specific metallic (Ag0) nanoparticles with >99% antibacterial efficacy. This strategy redefines synchrotron radiation from an observational probe to a transformative manufacturing tool, offering a versatile paradigm for the seamless integration of soft electronics and bioactive microdomains.

The escalating demand for multifunctionality in carbon fiber reinforced poly(ether ether ketone) (CF/PEEK) composites has intensified the need for next-generation structural materials. However, achieving a synergistic integration of functional performance and structural integrity—rather than a trade-off—remains a critical challenge. Herein, tetrapod-shaped ZnO whiskers decorated with 2D Ti3C2Tx MXene nanosheets (T-ZnO@MXene) were fabricated via electrostatic self-assembly and incorporated into CF/PEEK composites. This 3D conductive/enhanced network enabled the simultaneous enhancement of mechanical properties, electromagnetic interference (EMI) shielding, and electrothermal deicing capabilities. The optimized CF/T-ZnO@MXene/PEEK composites exhibited a flexural strength of 1970.0 MPa, a flexural modulus of 142.3 GPa, and an interlaminar shear strength of 123.2 MPa, representing improvements of 33.4 %, 45.1 %, and 56.7 % over pristine CF/PEEK, respectively. Concurrently, the through-thickness electrical conductivity surged for 7.7 S/m, corresponding to a 76-fold enhancement, while the EMI shielding effectiveness attained 56.7 dB (a 40.7 % increase). In addition, the composites demonstrated efficient electrothermal conversion and reliable deicing performance. Overall, this work provides an effective route to harmonize structural robustness with multifunctional capabilities in CF/PEEK composites, opening new opportunities for advanced aerospace applications.

Esophageal cancer remains one of the most lethal malignancies worldwide, with particularly poor outcomes following disease progression after first-line chemoimmunotherapy. Antibody-drug conjugates (ADCs) have emerged as a transformative therapeutic class that combines the targeting precision of monoclonal antibodies with potent cytotoxic payloads, enabling selective tumor cell killing while minimizing off-target toxicity. In the management of advanced esophageal cancer, I advocate for the integration of ADCs as a therapeutic option following progression on first-line chemoimmunotherapy. For patients with human epidermal growth factor receptor 2 (HER2)-positive gastroesophageal junction adenocarcinoma, trastuzumab deruxtecan is my preferred choice based on its superior overall survival benefit and robust bystander killing effect, which also confers activity in HER2-low tumors. For HER2-negative gastroesophageal adenocarcinoma, trophoblast cell-surface antigen 2 represents a promising target given its high prevalence of moderate to strong expression in nearly 80

While polyetherimide (PEI) is widely used in electrical insulation and aerospace components, its high-temperature performance remains limited due to thermal degradation and dielectric loss at elevated temperatures. To address these limitations, a series of PEI composite films (xBACB/PEI, x = 5, 10, 15, and 20 wt%) were synthesized by copolymerizing the rigid monomer 1,2-dibenzylamino-o-carborane (BACB) with 4,4 '-(4,4 '-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA) and p-phenylenediamine (PDA). Incorporation of the three-dimensional carborane cage effectively enhanced the thermomechanical and dielectric properties. The composites exhibited good thermal stability, with 5% weight loss temperatures (Td5%) reaching up to 509 degrees C in argon and exceeding 500 degrees C in air, alongside elevated glass transition temperatures (Tg = 240 degrees C). Additionally, the carborane units reduced the dielectric constant (epsilon r) and the dielectric loss tangent (tan delta) by enlarging free volume and suppressing dipole polarization. 10BACB/PEI achieved the lowest epsilon r (3.31 at 20 degrees C) and the smallest tan delta increase (Delta tan delta = 0.68) from 20 degrees C to 200 degrees C. Furthermore, the breakdown strength increased from 9.33 kV mm-1 (neat PEI) to 75.5 kV mm-1 (15BACB/PEI), demonstrating good dielectric reliability. This work presents a viable molecular design strategy for developing high-performance insulating materials that are operable under extreme conditions.