Strong bifunctional electrocatalysts capable of sustaining both oxygen reduction (ORR) and oxygen evolution (OER) at high depths-of-discharge are crucial for practical rechargeable zinc-air batteries (ZABs). Here, we present a novel MnFeCoNiCu high-entropy alloy uniformly anchored on nitrogen-doped carbon nanotubes, derived from a high-entropy layered double hydroxide precursor. A dicyandiamide-assisted pyrolysis enabled simultaneous CNT growth, nitrogen doping, and alloy nanoparticle formation, yielding a single-phase face-centered cubic HEA at 900°C (HEA 900). Structural analyses confirmed homogeneous atomic-level metal dispersion, significant lattice distortion, and strong metal-carbon coupling, providing abundant active sites and enhanced conductivity. Owing to these synergistic effects, HEA 900 exhibited excellent bifunctional activity with an OER overpotential of 475 mV at 10 mA/cm2, an ORR half-wave potential of 0.81 V, and a low ΔE of 0.89 V. The HEA-based ZAB showed a near-theoretical specific capacity of 801 mAh/gZn, and a peak power density of 186 mW/cm2. The cell's remarkable reversibility and mechanical robustness were confirmed by extended cycling under high DOD (up to 10 h per cycle) and impressive energy efficiency over 3325 cycles. Flexible gel-polymer ZABs further demonstrated robust mechanical and electrochemical durability, highlighting this HELDH-derived HEA strategy as a promising paradigm for entropy-engineered catalysts in high-performance ZABs.

Uniform rod-like NbSe2 nanostructures were precisely fabricated from bulk NbSe2 using a one-pot, rapid supercritical fluid process, where a mildly basic solution acted as the exfoliating agent. The formation of NbSe2 nanorods was confirmed by microscopic analyses. XRD, Raman, and XPS results further validated the successful exfoliation and indicated partial surface oxidation of NbSe2 into Nb2O5 nanostructures during SCF processing. Interestingly, the formation of rod-like NbSe2 was largely suppressed in the synthesis of RGO-NbSe2 nanocomposites, as the RGO nanosheets hindered the growth of such morphologies. The synthesized RGO-NbSe2 nanocomposites exhibited outstanding electrocatalytic activity toward hydrogen evolution, requiring only similar to 123 mV overpotential to reach 10 mA cm(-2). This performance notably surpassed that of the pristine NbSe2 nanorods, which required similar to 355 mV for the same current density. This enhancement is attributed to the efficient exfoliation of bulk NbSe2 into nanosheets, which enhances the exposure of reactive edge sites and promotes the formation of heterostructures with favourable hydrogen adsorption characteristics. The integration with highly conductive RGO further contributes to charge transfer and overall catalytic synergy.

Metal‐ion decorated covalent organic frameworks (M‐COFs) are prepared by reacting aldehyde‐terminated Cu(I) clustered monomers and amine‐terminated triazine monomers through imine linkages, and the as‐prepared Cu(I) cluster‐based COF is analyzed and tested for its electrocatalytic activity toward oxygen reduction reactions. These M‐COFs are more stable and active under adverse conditions. The annealed sample (ACu‐COF) displays an increased surface area of 120 m 2 g −1 compared to the pristine sample Cu‐COF (19 m 2 g −1 ). Because of its larger specific surface area, and active nitrogen content, the annealed counterpart with flower morphology exhibits exceptional oxygen reduction reaction (ORR) capabilities. The ACu‐COF sample demonstrates a nearly four‐electron ORR process, an onset potential of 0.92 V versus reversible hydrogen electrode (RHE), and a diffusion limiting current density of 3.85 mA cm −2 . It also reached a half‐wave potential of 0.78 V versus RHE. After 2000 cycles, the onset potential of the ACu‐COF only dips by 28 mV, demonstrating its remarkable long‐term durability. Additionally, the homemade primary zinc‐air battery employing ACu‐COF produces a specific capacity of 747 mAh g −1 and a maximum peak power density of 133 mW cm −2 .

Precise tailoring of the surface texture and composition of porous carbon materials is crucial for enhancing the energy storage performance of the supercapacitors. Here, we report the fabrication of high-surface-area, self-nitrogen-oxygen-doped porous carbon materials from the sustainable carbon source, Areca catechu nut, by controlling the carbonization temperature (800 to 1000 degrees C) using alkali (KOH) as an activator in an inert nitrogen atmosphere. The material characterizations revealed ultra-high surface area of the carbon materials (2,337 m2 g-1), with hierarchical micro- and mesoporosity and heteroatom retention (N, O). Activation significantly enhanced the surface textural properties, increasing the specific surface area and pore volumes from 57 to 2,337 m2 g-1 and from 0.14 to 2.59 cm3 g-1, respectively. The electrochemical performance of the prepared carbon materials was then studied in a 3-electrode cell configuration in an aqueous electrolyte (1 M H2SO4). The optimal sample, ANC_K1000, achieved a very high gravimetric capacitance of 410 F g-1 at a current density of 1 A g-1. The symmetric supercapacitor cell constructed with the optimal material delivered a decent energy density of 10.3 Wh kg-1 at the power density of 600 W kg-1, coupled with a capacity retention of 90.6% after 10,000 charge-discharge cycles. These results demonstrate a simple, facile, and sustainable method for fabricating biomass-derived porous carbon materials from A. catechu nuts, which show immense potential as electrode materials for efficient energy storage in supercapacitors.

Photocatalytic water splitting is recognized as one of the most promising and sustainable approaches for green hydrogen production. In recent years, ternary nanocomposite materials have demonstrated remarkable potential in achieving high solar-to-hydrogen conversion efficiencies. In this study, TiO2-SiO2-activated carbon (TSAC) ternary nanocomposites were synthesized from naturally abundant minerals via an acid-base extraction followed by ball milling. The incorporation of SiO2 into TiO2 enhances diffused photon scattering due to its high light reflectance, effectively redistributing incident photons in multiple directions within the nanocomposite during photocatalysis. Meanwhile, activated carbon, serving as a cocatalyst, facilitates efficient charge separation by trapping photogenerated electrons on its conductive surface, where water reduction occurs. The optimized nanocomposite containing 7.5 wt.% activated carbon (TSAC 7.5) exhibited the highest hydrogen evolution rate of 19.8 mmol/h/gcat, which is 14.8 times higher than that of pristine TiO2. Therefore, the enhanced activity arises from the synergistic effect of SiO2 induced internal light reflection and the electron-trapping ability of activated carbon. Furthermore, the prepared ternary nanocomposite demonstrated excellent stability, retaining consistent activity over five consecutive photocatalytic cycles. This work presents a sustainable, scalable, and efficient strategy for developing photocatalysts derived from natural resources for green hydrogen generation.

Poly(vinyl alcohol) (PVA)-based gel/solid-state electrolytes are favored for flexible supercapacitors (FSCs) due to their biodegradability, cost-effectiveness, nontoxicity, hydrophilicity, high dielectric constant, and mechanical strength. However, the low ionic conductivity of these gel electrolytes limits the specific capacitance, energy density, rate performance, and cycle life of the supercapacitors. Also, the supercapacitor's high self-discharge rate adversely affects the device's overall electrochemical performance. To overcome these challenges, we demonstrated a straightforward strategy to enhance the ionic conductivity while concurrently reducing the self-discharge rate of FSCs by incorporating poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT-PSS) in the PVA/H2SO4 gel electrolyte, and utilizing B,S-codoped graphene (BSGO) as an electrode. The ionic conductivity of the PVA/H2SO4 gel electrolyte with PEDOT-PSS increased substantially from 2.6 to 14 mS/cm, the energy density experienced a twofold enhancement from 4 to 10 Wh/kg, and the rate capability exhibited a remarkable uplift from 50 to 80%. Notably, the self-discharge characteristics of the FSC were significantly mitigated by incorporating PEDOT-PSS in PVA/H2SO4. The fabricated FSC device with modified electrolyte exhibited an impressive voltage retention of 72% of its maximum working voltage after 2400 s in open-circuit conditions, while it was only 43% for PVA/H2SO4. The observed performance enhancement can be attributed to the reversible redox reactions between the sulfonate ions in PEDOT-PSS and the H+ ions in the electrolyte, thereby facilitating improved ionic transport and electrochemical stability.

Oxygen reduction reaction electrocatalysts are crucial for the advancement of high-efficiency fuel cells and metal-air batteries. However, the development of cost-effective catalysts with high activities and durabilities remains challenging. Here, a cost-effective method is presented for synthesising Co-Nx doped hierarchically porous carbon (ZC-N/C) from a conducting polymer, delivering excellent ORR activity and stability. The high performance is attributed to the dense Co-Nx active sites formed via Zn ion incorporation, which increases the surface area and prevents cobalt oxide/sulfide formation, stabilising the Co2+/Co3+ states. The synergistic effect of Zn, Co, and the N-doped carbon matrix modifies the electronic structure, enhancing the reaction site density and boosting the ORR activity. ZC-N/C exhibits ORR onset and half-wave potentials that are comparable to those of commercial Pt/C under alkaline conditions. The doped Co/Zn-Nx moieties provide excellent stability, with a Delta E1/2 of only 16 mV after 10 000 cycles (0.6 - 1 V vs RHE). As a cathode in an anion membrane fuel cell, ZC-N/C achieves a peak power density of 215 mW cm-2, similar to Pt/C. In a zinc-air cell, it delivers 136 mW cm-2 power density and 780 mAh gZn -1 capacity at 5 mA cm-2 demonstrating strong potential as a low-cost ORR electrocatalyst.

Zinc-air batteries, with their high energy density, offer an environmentally friendly energy solution. However, the sluggish kinetics of oxygen reduction and oxygen evolution reactions at the air cathode limits their practical application. Therefore, designing a long-lasting and efficient bifunctional oxygen electrocatalyst for the air cathode of zinc-air batteries is highly crucial. This study introduces a low-cost bifunctional oxygen electrocatalyst synthesized by integrating a copper cobalt oxide over a nitrogen-doped hollow carbon sphere through a single-step silica template method. The catalyst exhibited a superior bifunctional performance that rivals the benchmark RuO2 and Pt/C 20% catalysts. When integrated into the air cathode of the zinc-air battery, the catalyst exhibits remarkable performance by achieving a high peak power density of 176 mW cm-2 and a specific capacity of 781 mAh g-1, nearing the theoretical capacity. Furthermore, the catalyst has exhibited superior durability during prolonged charge-discharge cycles with minimal degradation over 200 h. These studies validate the copper-cobalt oxide integrated nitrogen-doped hollow carbon spheres as a promising air cathode material for high-performance zinc-air batteries.

An advanced catalyst drives innovation in zinc–air battery technology, delivering exceptional performance, stability, and efficiency with successfully powering a mobile phone.

Correction for ‘Ionic-liquid-engineered, interfacial π–π-anchored, cobalt-dispersed, and N-, F-, B-doped carbon matrix as an oxygen electrocatalyst for advanced zinc–air batteries’ by Nadar Allwyn et al., J. Mater. Chem. A, 2025, 13, 13935–13950, https://doi.org/10.1039/D5TA00770D.

The rational design of electrode materials is pivotal for optimizing the performance of energy storage and conversion systems such as supercapattery and electrocatalysis. In this study, a one-step supercritical fluid synthesis is presented to craft a unique heteroepitaxial composite, incorporating nickel di-selenide nanoparticles on niobium carbide MXene nanosheets in various ratios. The integration of 2D nanosheets enhances the kinetics of the electrode reaction process, while NiSe2 facilitates efficient charge transport in MXene. The composite demonstrated superior performance with the 1:2 ratio of NiSe2/Nb(2)CTx demonstrates an impressive specific capacitance of 1309 C g(-1) at 2 A g(-1) current density in a three-electrode system. Furthermore, the asymmetric supercapattery, featuring NiSe2/Nb(2)CTx 1:2 (positive electrode) and bio-derived activated carbon (AC) (negative electrode) achieves a gravimetric capacitance of 205 C/g at 0.5 A g(-1) current density, a power density of 10,800 W kg(-1) at the energy density of 64 Wh kg(-1), with 90% retention after 12 000 cycles. As a catalyst for water oxidation, the NiSe2/Nb(2)CTx 1:2 exhibits the lowest over potential of 359 mV at the current density 10 mA cm(-2) and Tafel slope of 105 mV dec(-1). This investigation introduces an innovative approach for developing high-performance supercapattery electrode materials and electrocatalysts using MXene.

Lithium-ion batteries (LiBs) are widely used in various applications because of their high energy density, low self-discharge rate, and portability. The requirements for LiBs continue to increase drastically every year; however, the disposal of spent LIBs is a cumbersome task. To resolve this issue, spent LiB anodes are customized into high-performance supercapacitor (SC) electrodes via supercritical water exfoliation. The specific capacitance of spent LiB anodes (289 F g-1 at 2 A g-1) significantly improved after exfoliation (351 F g-1 at 2 A g-1). Furthermore, the electrochemical performance of the exfoliated LiB anode mushroomed upon the addition of dopamine (as a redox-additive for the first time) with a conventional H2SO4 electrolyte. The specific capacitance of the exfoliated LiB anode is incredibly improved after the addition of dopamine with H2SO4, from 286 to 571 F g-1 at 4 A g-1. A flexible SC is also fabricated using PVA/H2SO4 and dopamine/PVA/H2SO4 as the gel electrolyte. The fabricated flexible SC with dopamine/PVA/H2SO4 exhibited an enormously high energy density of 44 Wh kg-1 at 700 W kg-1. The increased specific capacitance and energy density of the SC after the addition of dopamine with H2SO4 and PVA/H2SO4 may be due to the reversible reaction of dopamine to dopamine-o-quinone with H+ ions. Spent Li-ion battery anodes are customized into high-performance supercapacitor electrodes via supercritical water exfoliation.image

NASICON structured Na3V2(PO4)(3) (NVP) has captured enormous attention as a potential cathode for next-generation sodium-ion batteries (SIBs), owing to its sturdy crystal structure and high theoretical capacity. Nonetheless, its poor intrinsic electronic conductivity has led to inferior electrochemical performance in terms of rate capability and long cycling performance. To address this problem, a combined strategy is adopted, such as (1) carbon coating and (2) high valent Sn4+ ion doping in the lattice site of vanadium in the NVP cathode. Carbon coating can effectively enhance the surface electronic conductivity, wherein high-valent Sn4+ improves the bulk intrinsic electronic conductivity of the materials. Moreover, Sn is a well-known alloying/dealloying type anode for SIBs; thus, doping of such metal in cathode materials will assume the role of structure stabilizing pillars and establishing high-performing cathode materials. Herein, Na3V2-xSnx(PO4)(3)/C (denoted as Sn(x)-NVP/C, where x = 0.00, 0.03, 0.05, 0.07, 0.1) were synthesized via sol-gel route, followed by calcination at 800 degrees C. XRD, Raman, XPS, and electron microscopy data confirmed the high purity of the synthesized cathode. The optimized Sn(0.07)-NVP/C exhibited excellent electrochemical performance in terms of high rate capability and long cycling performance, a high appreciable capacity of 98 mAh g(-1) with capacity retention of 85% after 500 cycles. Similarly, at a high current of 20C, it is still able to deliver a stable capacity of 76 mAh g(-1) with 85% capacity retention after 3000 cycles. The rate capability study indicates the high current tolerance of Sn(0.07)-NVP/C up to 70 C with a capacity delivery of 55 mAh g(-1). It is worth mentioning that CV and EIS analysis for Sn(0.07)-NVP/C cathode displayed minimum voltage polarization and enhanced diffusion coefficient. Moreover, DFT calculation also proved that the electronic and ionic conductivity of NVP is promoted by Sn doping. Hence, the present results demonstrated that Sn(0.07)-NVP/C is considered a promising cathode for sodium-ion battery application.

The reality of long-term rechargeable and high-performance zinc-air batteries relies majorly on cost-effective and eminent bifunctional electrocatalysts, which can perform both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). Herein, we demonstrate a new approach for the synthesis of in-situ-grown layered double hydroxide of iron and cobalt over a cobalt nanoparticle-enriched nitrogen-doped carbon frame (CoL 2:1) by a simple coprecipitation reaction with facile scale-up and explore its electrocatalytic ORR and OER activity for an electrically rechargeable zinc-air battery. Consequently, the developed composite displays excellent ORR and OER activity with an ORR half-wave potential of 0.84 V, a limiting current density of 5.85 mA/cm(2), and an OER overpotential of 320 mV with exceptional stability. The outstanding bifunctionality index of the catalyst (Delta E = 0.72 V) inspired us to utilize it as a cathode catalyst in an in-house developed prototype zinc-air battery. The battery could easily supply a specific capacity of 804 mAh/g with a maximum peak power density of 161 mW/cm(2). The battery exhibits an attractive charge-discharge profile with a lesser voltage gap of 0.76 V at 10 mA/cm(2) with durability for a period of 200 h and a voltage efficiency of 97%, which surpassed the corresponding Pt/C + RuO2-based zinc-air battery. Further, a maximum load of 50 mA/cm(2) could easily be sustained during cycling, revealing its outstanding stability. A series-connected two CoL 2:1-based zinc-air batteries effortlessly enlighten a pinwheel fan and LED panel simultaneously, revealing its practicality. The high electrical conductivity and greater specific surface area of Co/N-C and its robust attachment with Fe/Co LDH preserves both active sites, thereby resulting in exceptional performance. Our method is capable of being flexible enough to create various bifunctional Co/N-C-based composite electrodes, opening up a feasible pathway to rechargeable zinc-air batteries with maximum energy density.

A facile chemical process for the synthesis of ZnS/ZnSe composites and theoretical and experimental insights into their sunlight-driven photocatalytic H2 production via watersplitting reactions are demonstrated. ZnSe systems are varied by synthesizing at various temperatures such as 80, 150, and 180 degrees C for 12 h via hydrothermal process to tune their crystalline properties while maintaining ZnS as the host material, which is the main driving force to achieve increased photocatalytic H2 production efficiency in this study. The prepared composite photocatalyst is found to have cubic ZnS and wurtzite ZnSe phases with good overall crystalline properties. The morphological investigation revealed that the composite consists of ZnS with a spherical structure coupled with irregular-structured ZnSe particles. The optimized ZnS/ZnSe (ZnSe prepared at 150 degrees C) photocatalyst showed the highest H2 generation of around 84.8 mmol h-1 g-1cat, with a UTH (i.e., UV-visible-toH2) conversion efficiency and turnover frequency of 20.4% and 0.097 Atom-1 s-1, respectively. This observed photocatalytic efficiency is presumed to be the formation of type-I heterojunction channelizing the effective transfer of hot photocarriers from ZnS to ZnSe for the rapid production of protons (H+) and their subsequent reduction to H2 molecules. The achieved highest efficiency of the composite is around 56.4 and 4.2 folds higher than the pristine ZnSe and ZnS, respectively. In addition, the recycle experiments of the optimized catalyst showed consistent H2 production for upto 5 cycles. Further, the developed composite systems are investigated via density functional theory and validated through various physio and electrochemical analyses to understand their structure-property relationships and photocatalytic mechanisms toward water splitting for H2 production.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Oxide nanomaterials have attracted significant attention as energy storage materials. The combination of spinel-perovskite oxides as nanocomposites creates dense oxygen vacancies (VO) at the hetero-interface. VO present in the complex oxides are indispensable for energy conversion applications. Herein, we demonstrated the one pot synthesis of spinel-perovskite NiFe2O4-xLaFeO(3) nanocomposite and investigated the phase formation using variable temperature powder X-ray diffraction of the gel precursor. The role of oxygen-vacancy mediated tuneable redox transitions in NiFe2O4-xLaFeO(3) nanocomposite has been understood. The anion-intercalation-based pseudocapacitance and the oxygen intercalation have been exploited for high-performance electrochemical energy storage. The NiFe2O4-2LaFeO(3) exhibited a high specific capacity of 652 C g(-1) at a current density of 2 A g(-1). The fabricated NiFe2O4-2LaFeO(3)||NiCo2O4 asymmetric supercapacitor device (ASC) exhibited excellent cyclability over 20,000 cycles with superior capacity retention and high Coulombic efficiency (92 %) and achieved a high energy density of 42.5 Wh kg(-1) at a power density of 1500 W kg(-1). The presence of VO and the mixed-valence states of Fe2+/3+ were confirmed by XPS-depth profiling. The tuneable redox transition of Fe2+/3+ and VO contribute to the higher pseudocapacitance response.

Sodium-ion batteries are receiving a lot of interest in new electrochemical storage systems because they are less expensive than lithium-ion batteries. NaSICON-structured cathode materials such as Na3MnZr(PO4)(3), Na4MnV(PO4)(3), and Na4MnCr(PO4)(3) are attractive because of their high voltage and capacity. As with different transition metals, the performance of cathode materials varies. In the present research, the partial substitution of Na4MnxFeyCrz (PO4)(3) with three different Fe concentrations was performed and their electrochemical performance was investigated. The refined X-ray diffraction (XRD) patterns of synthesized materials show a rhombohedral structure over an R(3) over bar c space group. The Fe substitution had an unfavorable influence on the electrochemical performance, resulting in a reduced capacity of 86 mAh g(-1). Aside from diminished specific capacity, replacing Mn with Fe improved the rate performance in the three compositions by reducing polarization in redox pairs. The enhanced rate performance when incorporating more Fe atoms was explained by the sodium-ion migration barrier in the material, which was predicted using theoretical bond valence site energy (BVSE) analysis and reflected by the diffusion coefficient calculated using the experimental galvanostatic intermittent titration technique (GITT) approach.

A low-cost, highly stable, bifunctional electrocatalyst is crucial for advancing zinc-air battery technology. This study introduces a cobalt oxide-decorated nitrogen sulfur dual-doped hollow carbon sphere, as a promising candidate for the air cathode of a zinc-air battery. Synthesized using a novel single-step hard template method, the catalyst exhibits exceptional performance in both oxygen evolution and oxygen reduction reactions, rivaling commercial RuO2 and Pt/C catalysts. This enhanced bifunctional activity is due to the synergistic effects of metal oxide decoration and heteroatom doping (nitrogen, sulfur). When integrated into a zinc-air battery, the catalyst delivers an impressive power density (205 mW cm-2) and specific capacitance (737 mA h g-1), surpassing commercial alternatives. The catalyst demonstrates exceptional long-term stability, maintaining its performance for over 160 h, a significant improvement compared with commercial Pt/C + RuO2. These results highlight the outstanding stability and durability of cobalt oxide-decorated nitrogen sulfur dual-doped hollow carbon sphere as a promising candidate for air cathode materials in future zinc-air batteries.

Photocatalytic hydrogen generation from water is one of the promising approaches for direct solar-to-fuel conversion to address the energy crisis. Developing an efficient, cost-effective, durable photocatalyst for sustainable hydrogen production is a great challenge in this technology. Metal chalcogenides are widely used potential materials in the photocatalysis field; however, metal sulfides are photocorrosive in nature compared to metal selenides, which limits their application. Herein, supercritical fluid becomes completely compatible with photocatalyst preparation, as it controls the morphology of materials. The synthesis of CoSe and NiSe using a homogeneous, one-pot synthesis of supercritical fluid processing with a very short reaction time of 30 min has been demonstrated, and then they are coupled with a TiO2 photocatalyst to improve the hydrogen production rate. Due to the conductive nature of metal selenides (CoSe and NiSe), fast electron transfer and charge separation are highly feasible, which help to improve the hydrogen production rate. Various weight percentages of the metal selenide (CoSe or NiSe)/TiO2 nanocomposite were prepared, and photocatalytic activity was examined using glycerol and lactic acid as hole scavengers. The CoSe/TiO2 and NiSe/TiO2 nanocomposites showed maximum hydrogen evolution rates of 202.2 and 169 mmol/h/gcat, respectively, which are very close to that of 1 wt % Pt/TiO2. In this context, metal selenides (CoSe/NiSe) are promising cocatalysts for TiO2 toward viable hydrogen production.

Cognitive design with controlled nanostructure, crystal phase, and electronic configuration would allow the realization of fundamental and functional properties of transition metal selenides in a variety of energy storage/conversion devices. A systematic synthesis approach was developed to produce spindle like NixCo1-xSe2 nanobelts. Comprehensive spectroscopic studies divulge the optimal conditions for an enriched redox reaction, eminent conductivity, and formation of solid solutions. When employed as a supercapattery electrode, physicochemical amendments of a series of solid solutions ameliorated the specific capacity from 103 to 368 mAh/g (capacitance 822 to 2964F/g) at 2 A/g and upgraded the retention rate from 63 to 82 % at a maximum current of 20 A/g. Owing to the superior performance, the fabricated NixCo1-xSe2 // G hybrid supercapattery cell delivers a high energy density of 56 Wh/kg, a maximum power density of 16 kW/kg at 40 Wh/kg, and maintains 96 % of the capacity after 10,000 cycles. These results not only hallmark the symptomatic role of the synthesis method but also interpret the relationship between the nanostructure, physicochemical properties, and electrochemical performances of bimetal selenides. Which could potentially be used to set the stage to detour the bottlenecks of electrode materials that need to be improved for next-generation electrochemical energy storage technologies.