Ti3C2Tx-based MXenes have become up-and-coming energy storage materials owing to their excellent physiochemical properties. However, the inadequate availability of Na+ ​adsorption sites and unsatisfactory sodium storage performance hinder the application of Ti3C2Tx-based electrodes in sodium-ion batteries (SIBs). Herein, the surface of few-layered Ti3C2Tx was functionalized with ultra-dispersed TiO2 nanoparticles (∼20 ​nm) to form an ultra-dispersed TiO2/few-layered Ti3C2Tx heterostructure (UD-TiO2/f-Ti3C2Tx) via an in-situ sol-gel method. To further improve the electrochemical performance, a post-treatment process of calcination was also employed, which effectively removes the inert surface functional groups, especially F groups. Benefiting from the stronger Na+ ​adsorption capability on TiO2 compared to Ti3C2Tx, expanded interlayer distance and increased electrical conductivity, the constructed UD-TiO2/f-Ti3C2Tx electrode displays a remarkable capacity of 190 mAh g-1 at 0.02 ​A ​g-1, which is over four times that of pristine f-Ti3C2Tx (44 mAh g-1). Moreover, the UD-TiO2/f-Ti3C2Tx electrode delivers an excellent cyclability with 92% retention at 2 ​A ​g-1 even after 10 ​000 cycles. This work offers an alternative strategy for the controllable fabrication of ultra-dispersed TiO2 nanoparticles on the Ti3C2Tx surface, and highlights the promise of the UD-TiO2/f-Ti3C2Tx heterostructure as an anode material for SIBs, providing valuable insights into the development of high-performance Ti3C2Tx-based electrodes.

Zinc-air batteries (ZABs) are the promising candidates for the novel electrochemical energy storage devices due to their large theoretical specific energy density, high safety and low cost. However, the slow reaction kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in air cathodes limit their practical applications. As an extension of single-atom catalysts (SACs), dual-atom catalysts (DACs), with maximum atom utilization efficiency, high catalytic site loading and tunable active site configurations, are expected to further enhance the ORR/OER catalytic performance, thus becoming a strong candidate for ZABs. In this review, the strategies for introducing bimetallic sites are firstly summarized, then the effects of electronic and geometrical structures of the active centers on the catalytic mechanism are illustrated at the atomic level. In addition, we discuss the roles of DACs as an air cathode catalyst in adjusting the adsorption state of reactant molecules, changing the reaction pathways and lowering the reaction energy barriers of key steps. Finally, the prospects and challenges of DACs in ZABs are envisioned, aiming to provide new ideas for the design of novel bifunctional catalysts in the field of ZABs.

Regulating catalyst electronic structure coupled with supercritical CO2 enables a green catalytic hydrogenation system for polycyclic aromatic hydrocarbons (PAHs), advancing high-value utilization of heavy resources. This approach overcomes limitations of conventional organic solvents-VOC emissions, high recovery costs, and energy consumption. Herein, uniformly dispersed Ni nanoparticles anchored on hierarchical ZSM-5-zeolite were synthesized via alkali treatment of the support, ion exchange, and urea hydrolysis to optimize the electronic properties of Ni. The study reveals that interfacial electron transfer at the metal-support interface, combined with the synergistic solvent effects of scCO2, significantly enhances catalytic activity. The alkali-treated M-ZSM-5-zeolite, featuring abundant surface hydroxyl groups and defect sites, promotes Ni dispersion and strengthens the electronic metal-support interaction (EMSI). Under mild conditions (180 degrees C, 2 MPa H2, 1 h), anthracene conversion reached 99 % with 43 % selectivity toward octahydroanthracene, while hydrogen utilization efficiency increased by over 10 %. scCO2 facilitates efficient hydrogen dissolution and mass transfer, enabling high conversion at low temperatures and pressures, and avoiding the limitations from the usage of traditional organic solvents. This work not only provides a green catalytic strategy for PAHs conversion but also establishes a theoretical foundation for designing high-performance hydrogenation catalysts.

Solid-state lithium batteries, offering high energy density and enhanced safety, are widely regarded as the leading candidates for next-generation battery technology. Among the various solid-state electrolyte systems, polyethylene oxide (PEO)-based composite solid-state electrolytes (CSEs) integrate the merits of multiple electrolyte types, positioning them among the most promising options for practical application. To further optimize and enhance the integrated performance of PEO-based CSEs, this study presents a cellulose acetate (CLA)-reinforced PEO-Li6.4La3Zr1.4Ta0.6O12 (LLZTO) CSE. CLA provides additional Li+ transport pathways within the PEO matrix and promotes the dissociation of LiTFSI. As a result, the fabricated CSE exhibits excellent Li+ conductivity (2.72 × 10−4 S cm−1) and a high Li+ transference number (0.62) at 60 °C. Moreover, the CLA network imparts superior mechanical robustness to the CSE, thereby maintaining the structural integrity of the electrolyte during battery operation and enhancing cycling stability. The Li-Li symmetric battery incorporating this electrolyte achieves stable cycling for over 4200 h at a current density of 0.1 mA cm−2. Furthermore, the LiFePO4 (LFP) solid-state battery delivers a high initial discharge capacity of 158.8 mAh g−1 at 0.2 C and 60 °C, exhibiting a capacity retention of 93.0% after 100 cycles. At 1 C, the battery attains a high initial capacity of 150.3 mAh g−1 and maintains a capacity retention of 80.6% after 600 cycles, while also achieving stable cycling for 1200 cycles at 2 C. This work provides a promising strategy for the application of cost-effective composite solid electrolytes with superior comprehensive performance in solid-state lithium batteries.

In this study, the effects of ether group substitution on the electrochemical properties of [Ti2V4O5(OCH3)14] (Ti2V4) and [Ti3V3O4(OCH3)15]+ (Ti3V3+) were investigated by combining density functional theory (DFT) calculations and molecular dynamics (MD) simulations. The lowest unoccupied molecular orbital energy decreases from Ti2V4 (-1.98 eV) to the ether-substituted derivatives of Ti2V4 (-2.04 eV), and from Ti3V3+ (-2.55 eV) to the ether-substituted derivatives of Ti3V3+ (-2.64 eV). The ether substitution affects the electrochemical window of Ti3V3+ derivatives that increases from 2.69 V for Ti3V3+ to 2.97 V for [Ti3V3O4(OCH3)12(OCH2)3CCH2OC2H4OCH3]+ (Ti3V3TRIOLC+). The ether substitution also affects the interaction between vanadium-oxide clusters and both the solvent CH3CN and the supporting electrolyte tetrabutylammonium hexafluorophosphate ([NBu4][PF6]), leading to a substantial increase in the diffusion coefficient of the Ti3V3+ series: from 5.8 × 10-6 cm2 s-1 for Ti3V3+ up to 7.8 × 10-6 cm2 s-1 for [Ti3V3O4(OCH3)12(OCH2)3CCH2OCH3]+ (Ti3V3TRIOLB+) and 9.2 × 10-6 cm2 s-1 for Ti3V3TRIOLC+. Radial distribution function (RDF) and electrostatic potential (ESP) analyses further indicate that ether substitution modulates the surface charge density and enhances the hydrogen bonding interactions between CH3CN and vanadium-oxide clusters. These findings suggest that Ti3V3TRIOLC+ possesses superior electrochemical performance, highlighting its potential as a promising electroactive material for RFBs.

High-density, asymmetrically coordinated transition metal single atoms (TMSAs) are promising for high-performance electrochemical applications. Here we introduce a 'metal-organic gel-directed pyrolysis' strategy that enables gram-scale synthesis of Cu single atoms in N and P co-doped carbon (CuN3O-P/NPC) at a high mass loading of 30.5 wt%. This approach is generalizable to other TMSAs (Fe, Co, Ni, Zn) with similarly high loading and asymmetric coordination. As an electrocatalyst for the nitrate reduction reaction, CuN3O-P/NPC achieves an ammonia yield of 50.88 mg h(-1) mg(cat.)(-1) with a Faradaic efficiency of 97.3%, outperforming symmetrically coordinated counterparts. Density functional theory calculations show that the potential-limiting step shifts from *NO -> *NOH in symmetric analogues to *NOH -> *HNOH over CuN3O-P/NPC, accompanied by a lower free-energy change and more favourable thermodynamics. This work presents a scalable and generalizable strategy for constructing high-density TMSAs with engineered coordination environments for electrocatalysis and energy applications.

Two-dimensional transition metal carbides and/or nitrides (MXenes) have garnered eye-catching attention in the field of energy storage because of their high specific surface area, easily adjustable structure, and excellent electron transfer capability. Among them, Ti _3 C _2 T _x (T=O, OH, and F), the most prototypical MXene, renowned for its excellent electroconductivity and low ion diffusion barrier, outperforms other carbides in enhancing battery rate capabilities and accommodating various large metal ions. Consequently, it has been regarded as a strong competitor to replace graphite with next-generation anodes for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, poor stability and severe self-stacking of Ti _3 C _2 T _x nanosheets result in low specific capacity and capacity recession during prolonged cycling. To address these issues, intensive research efforts have been devoted to surface modification and structural engineering strategies to optimize Ti _3 C _2 T _x -based materials. This review presents a comprehensive summary of recent advancements in Ti _3 C _2 T _x -based materials regarding surface and structure engineering, highlights their electrochemical performance in LIBs and SIBs as anodes, and outlines the remaining challenges and future perspectives for further substantial improvement and practical implementation.

Aqueous zinc-ion batteries (AZIBs) are promising for grid-scale energy storage due to their inherent safety and economic viability. Nevertheless, AZIBs face major challenges in practical implementation, including unregulated zinc dendrite growth and parasitic reactions like hydrogen evolution and corrosion. Herein, an electrolyte engineering strategy is proposed, wherein ammonium dihydrogen phosphate (NHP) is employed as a multifunctional additive to mitigate these issues. Integrated experimental and theoretical analyses reveal that the NHP additive modulates the zinc anode-electrolyte interface through NH4+ adsorption, effectively suppressing waterinduced corrosion. Meanwhile, H2PO4- promotes the formation of the Zn3(PO4)2 center dot 4H2O on zinc anode, thus enabling dendrite-free Zn deposition. Furthermore, the ionization and hydrolysis processes of these two ions contribute to stabilizing the electrolyte pH during cycling. Accordingly, the NHP additive confers improved cycling stability by stabilizing the Zn electrode-electrolyte interphase. This is corroborated by a prolonged cycling durability of 386 h (1 mA cm- 2, 1 mAh cm- 2) in Zn//Zn symmetric cells and a 99.52% average coulombic efficiency (CE) over 1000 cycles for Zn//Cu half cells. Moreover, the Zn//MnO2 delivered a specific capacity of 165.8 mAh g- 1 after 500 cycles. This work exemplifies a rational electrolyte engineering strategy for zinc anode-electrolyte interface stabilization by applying multifunctional additive.

ZnMn2O4 (ZMO) is a promising cathode material for aqueous zinc-ion batteries (AZIBs) due to its high operating voltage, considerable theoretical capacity, and abundant elemental availability. However, the large hydration radius of Zn2+ results in sluggish Zn2+ insertion/extraction kinetics, restricting the rate capability and long-term cycling stability of ZMO. Herein, this study used a structural engineering approach to preferentially incorporate Ni2+ ions into the octahedral Mn sites (ZMNxO) or the tetrahedral Zn sites (NxZMO) within the ZMO lattice. Structural and electrochemical characterizations indicate that Ni2+ doping significantly improves the electronic conductivity and electrochemical activity of ZMO. Ex situ XRD further confirms that both ZMNxO and NxZMO maintain superior structural stability during cycling. As a result, the optimized ZMN0.01O electrode delivered a high reversible specific capacity of 103.1 mAh g- 1 after 1000 cycles at 1 A g- 1 with 97.4% retention. The N0.02ZMO electrode also retained 87.1% under the same conditions, both outperforming the pure ZMO electrode (72.6%). Density functional theory calculations further demonstrate that Ni doping narrows the band gap and increases the density of states near the Fermi level, particularly when accompanied by oxygen vacancies, thereby improving intrinsic conductivity. These results highlight a promising structural modulation strategy for developing high-performance ZMO-based cathodes for AZIBs.

Lithium-oxygen (Li-O-2) batteries exhibit an ultrahigh theoretical energy density, however, sluggish reaction kinetics and adverse parasitic reactions hinder their further development. Although carbon materials are widely used as oxygen reduction reaction (ORR) electrocatalysts due to their effective adsorption and stabilization of oxygen-rich intermediates (e.g., O-2(-), LiO2), their inefficient electron transfer interfaces and severe parasitic reactions limit the oxygen evolution reaction (OER) performance. To address these issues, we designed an interface-engineered MoS2/Co-NPs-NC heterostructured catalyst by in situ growth of MoS2 nanosheets on MOF-derived Co-NPs-NC substrates. The introduction of MoS2 facilitates the in situ formation of Mo-N coupling centers; these Mo-N centers synergistically interact with the intrinsic Co-N-x sites in Co-NPs-NC to establish Co-N-x/Mo-N dual-active catalytic centers & horbar;the core of the catalyst's enhanced bifunctionality. This dual-coupling system effectively compensates for the insufficient OER activity of single Co-NPs-NC catalysts while retaining its excellent ORR performance. These coordinated advantages enable the MoS2/Co-NPs-NC cathode to deliver exceptional electrochemical performance: a low overpotential of 0.86 V, a high specific discharge capacity of 11,516.2 mAh g(-1), and an extended cycling stability up to 206 cycles. This work underscores the exceptional potential of the MoS2/Co-NPs-NC heterostructure as a high-performance catalytic cathode for advanced Li-O-2 battery systems.

Photocatalytic CO2 reduction in aqueous media represents a crucial route for solar-to-fuel conversion using water as the proton source. However, selectively driving multi-electron CO2 reduction over the competing hydrogen evolution reaction (HER) remains challenging due to the complex proton-coupled electron transfer (PCET) reactions. Here, a hydrothermal approach is designed with in situ alkalization to anchor robust CuNi dual-atom sites on antioxidative hydroxyl-rich Ti3C2(OH)x MXene. The resulting Cu1Ni1/Ti3C2(OH)x catalyst achieves a high CO yield of 635.8 mu mol & sdot;g-1 & sdot;h-1 with 99.7 % selectivity and superior cycling stability, outperforming most reported MXene-based and diatomic-site catalysts. In situ spectroscopy and theoretical calculations reveal that Cu sites promote *COOH/*H formation and CO desorption, while Ni sites favor *COOH-to-*CO conversion and enhance water adsorption. This dual-atom synergy precisely regulates PCET at adjacent Cu and Ni sites, enabling HER suppression and enhanced CO generation. This work establishes a new paradigm for engineering stable MXene anchored dual-atom catalysts with site-specific functionalities for highly selective CO2 photoreduction.

Temperature monitoring serves as an effective safety measure for lithium batteries. However, conventional temperature sensing technologies face limitations in dynamic monitoring applications due to insufficient flexibility, poor adhesion to curved surfaces, and challenges in achieving multipoint measurements. Consequently, this work investigates a flexible thin-film temperature sensor based on a SnO2/RGO composite material, fabricated via a simple one-step hydrothermal process. The sensor enables temperature monitoring at multiple locations on the lithium battery surface, thereby more accurately reflecting the temperature distribution across the battery surface. The temperature sensor exhibits a highly linear (99.64%) negative temperature coefficient (NTC) characteristic over the range of 10-100 degrees C, along with high sensitivity (-0.766%/degrees C) and excellent cyclic stability. We used the fabricated temperature sensor to the surface of a pouch lithium battery for monitoring surface temperatures under both nonabuse and abuse conditions. The experimental results demonstrate that the sensor effectively captures temperature changes at different locations on the battery surface during actual nonabuse and abuse conditions, offering experimental validation supporting the advancement of flexible thin-film temperature sensors for lithium-ion battery temperature monitoring applications.

Conversion-type cobalt phosphide anodes suffer from sluggish kinetics and passivation induced by phase instability at high rates. Here, Co2P nanoparticles are coupled with Zn single-atom sites anchored on N-doped carbon (Co2P/ZnSA-C) via a convenient metal-organic gel derived method. Zn-N4 centers tailor the local electronic structure and guide the Co species to redisperse homogeneously during cycling, suppressing cluster growth and limiting the formation of inactive Li3P. Ex situ analyses coupled with DFT calculations reveal the strong Co adsorption and charge redistribution at the Zn-N4-C site, accounting for the improved redox reversibility. Benefiting from this architecture, Co2P/ZnSA-C delivers superior rate performance about 911 mAh g-1 at 0.1 A g-1 and 526 mAh g-1 at 10 A g-1, and affords a high capacity retention of 84.5% after 5000 cycles at 10 A g-1. Kinetic analyses reveal accelerated Li+ diffusion and enhanced pseudocapacitive behavior. This single-atom assisted conversion approach provides a viable pathway to overcoming the high-rate limitations of Co2P and offers general design principles for durable and fast-charging anodes of lithium-ion batteries.

Two-dimensional (2D) transition metal carbides and/or nitrides (MXenes) have attracted eyecatching attention in the field of energy storage, owing to their high specific surface area, easily adjustable structure and excellent electron transfer capability. Among them, Ti 3 C 2 T x (T = O, OH and F), the most prototypical MXene, renowned for its excellent electroconductivity and low ion diffusion barrier, outperforms other carbides in enhancing battery rate capabilities and accommodating various large metal ions. Consequently, it has been regarded as a strong competitor to replace graphite in next-generation anodes for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, the poor stability and serious self-stacking of Ti 3 C 2 T x nanosheets result in low specific capacity and capacity recession during prolonged cycling. To address these issues, intensive research efforts have been devoted to surface modification and structural engineering strategies to optimize Ti 3 C 2 T x -based materials. This review provides a comprehensive summary of recent advancements of Ti 3 C 2 T x -based materials regarding surface and structure engineering, highlights their electrochemical performance in LIBs and SIBs as anodes, and outlines the remaining challenges and future perspectives for further substantial improvement and practical implementation.

The growing demand for high‐energy‐density cathode is pushing LiCoO2 towards 4.6 V operation. However, the structural and interfacial instability of high‐voltage LiCoO2 is exacerbated when the charging cut‐off voltage exceeds 4.55 V, resulting in severe mechanical failure and subsequent dramatic capacity decay. Herein, through thermally driven element interdiffusion, a highly durable Co‐containing Li‐rich phase with the lattice coherence has been epitaxially grown along LiCoO2 surface, which enhances the intrinsic mechanical integrity of high‐voltage LiCoO2. Through establishing the lattice‐coherent Li‐rich surface, adverse side reactions, irreversible phase transition and lattice oxygen loss are significantly inhibited in high‐voltage LiCoO2, thereby alleviating cracks formation and maintaining the structural integrity. The presence of the Li‐rich phase endows LiCoO2 with the additional capacity and the excellent cycling stability at 4.6 V and even at 4.7 V. This work taps into a new avenue of surface engineering on high‐voltage LiCoO2.

LiCoO2 (LCO) cathode with higher energy density can be harvested through raising its upper cut-off voltage to 4.7V (vs. Li+/Li). However, such high-voltage operation exacerbates the bulk and surface instability of LCO, which is responsible for its rapid capacity decay at high voltages. Consequently, to address these issues, an integrated optimization design is reasonably proposed, which involves Mg/F/PO43- cooperative modulation for LCO (LCO-MFP) based on the inherent behaviors of these elements. Specifically, our theoretical calculations reveal the distinct distribution of Mg/F/PO43- (Mg pillaring, F doping and PO43- coating), which is rooted in their innate occupancy propensity. Consistent with our theoretical results, it is experimentally discerned that Mg and F atoms prefer to enter Li layer and O framework of LCO, respectively, whereas PO43- gravitates towards enrichment on the surface, thereby stabilizing bulk structure, hampering the lattice O/Co evolution and enhancing surface stability. The resulting integrated optimized LCO-MFP cathode can achieve an excellent capacity retention of 81.0% at 4.7V after 200 cycles. This integrated optimization design is anticipated to pave the way for selecting appropriate modification elements with their intrinsic properties for high-voltage LCO cathode.

Ammonium-ion (NH4+) is a promising non-metallic charge carrier in aqueous energy storage with sustainability and environmental benignity. In spite of the unique H-bond mechanism between NH4+ and host material, the anisotropy caused from tetrahedral structure of NH4+ essentially limits its diffusion ability in host materials, still resulting in unsatisfied storage behavior. Herein, the built-in electric field (BIEF) mechanism has been first introduced towards NH4+ hybrid supercapacitor (HSC) by constructing MnOx/MnS2 p-n junction. The p-n junction BIEF has a reversibly changed field direction and provides extra inside coulombic force to boost the NH4+ diffusion kinetics, resulting in outstanding capacity of 838.56 F g- 1 (186.35 mAh g- 1) at 1 A g- 1 in 0.5 M NH4Ac, which simultaneously outperforms than those in metallic cation electrolyte due to the existed H-bond. Besides, an interlayer pillars effect induced by electrochemical in-situ intercalation of NH4+ stabilizes the layered matrix structure of MnOx/MnS2. As a result, the synergistical optimization of ion kinetics and crystal architectonics enables an ultra-stable NH4+ storage of 96.42 % capacitance retention upon 40000 cycles. The fabricated HSC delivers a high energy density of 79.57 Wh kg- 1 at the power density of 850 W kg- 1, of which the pouch-type device further manifests the practical applicability via powering real-life electric product, such as smartphone and ipad. This work provides new insight into improving NH4+ intercalation chemistry and developing advanced host materials for aqueous energy storage.

Lithium-oxygen batteries (LOBs) with a high theoretical energy density have attracted widespread attention. The large overpotential and poor cycle stability caused by inactive redox reactions are severe challenges for LOBs. NiO is a classic OER electrocatalyst, but its insufficient active sites lead to poor actual performance. Rare earth (RE) elements are regarded as crucial promoters for regulating electrocatalysis due to their unique orbital characteristics. Here, a flower-like Ce-doped NiO (Ce-NiO) nanorod catalyst is constructed to explore the influence of cerium doping on the structure of pure NiO and its application in LOBs. Ce-NiO undergoes significant structural changes, including an increased specific surface area and a more abundant distribution of surface defects. The doping process introduces a large number of oxygen vacancies, which improve the oxygen absorption capacity and reduce the charge transfer impedance. These modifications could effectively enhance the electrochemical performance and improve the OER kinetics. In the application of LOBs, Ce-NiO-based batteries achieve excellent rate performance and a high discharge capacity of 19787 mAh g-1 at a current density of 200 mA g-1. In addition, they could stably cycle more than 255 times at a current density of 200 mA g-1 and a cutoff capacity of 1000 mAh g-1. Notably the initial overpotential in the first cycle is as low as 0.62 V.

Conventional lithium-ion batteries suffer from impaired charge transfer kinetics due to high viscosity and low conductivity at low temperatures, alongside performance degradation, which restricts their applications in polar exploration and aerospace engineering. To address these challenges, we engineered a dual-salt electrolyte through solvent-salt-additive triple synergy. This system employs a LiPF6/LiFSI dual-salt electrolyte system, where the synergistic interaction between the two lithium salts optimizes electrode interfacial compatibility and ion transport kinetics. The solvent matrix is composed of EC (high dielectric constant medium), ethyl methyl carbonate (EMC, wide electrochemical stability window), and propyl acetate (PA, low freezing point), forming a functionalized composite solvent system. The incorporation of film-forming additives facilitates the formation of a dense and stable solid electrolyte interphase (SEI). Through this coordinated design, simultaneous enhancement of interfacial stability and lithium-ion migration kinetics is achieved. Consequently, the conductivity of this electrolyte is greater than 1 mS·cm−1 at -50 ℃. The LiCoO2/graphite lithium-ion battery employing this electrolyte exhibits outstanding performance: > 80

Inefficient hole injection represents a major challenge in achieving stable and cost-effective solution-processed blue quantum dot light-emitting diodes (QLEDs). The development of hole transport materials (HTMs) suitable for high-performance blue QLEDs has proven particularly difficult, mainly due to their inherently low hole mobility and mismatched energy levels. In this study, we designed and synthesized two vinyl-based cross-linkable HTMs: 4,4'-bis(3-vinyl-9H-carbazol-9-yl)-1,1'-biphenyl (CBP-V) and 2,8-bis(3-vinyl-9H-carbazol-9-yl)dibenzo[b,d]furan (KFP-V). Compared to CBP-V, the replacement of biphenyl groups with dibenzofuran groups in KFP-V results in a relatively lower cross-linking temperature of 200 °C and complete solvent resistance. Moreover, KFP-V exhibits exceptional hole transport properties, with a notable high hole mobility of 2 × 10-3 cm2 V-1 s-1. The HOMO level of KFP is reduced to -5.95 eV, effectively lowering the injection barrier between the HTL and QDs layer. When applied in solution-processed blue QLEDs, devices based on KFP-V show outstanding performance, achieving a maximum luminance of 31432 cd m-2 and an external quantum efficiency of 16.67%. Moreover, the cross-linked KFP-V enhances deep-blue emission characteristics, with Commission Internationale de l'Eclairage coordinates of (0.15, 0.03). This work offers valuable insights for the rational design of cross-linkable HTMs aimed at advancing solution-processed blue QLEDs.