Hollow bimetallic selenides polyhedrons bridged by graphene with fast and stable lithium/sodium storage performance

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 112, P. 115506 - 115506

Published: Jan. 28, 2025

Language: Английский

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Hollow-Structured Carbon-Coated CoxNiySe2 Assembled with Ultrasmall Nanoparticles for Enhanced Sodium-Ion Battery Performance

Inorganics, Journal Year: 2025, Volume and Issue: 13(3), P. 96 - 96

Published: March 20, 2025

Transition metal selenides are considered one of the most promising materials for sodium-ion battery anodes due to their excellent theoretical capacity. However, it remains challenging suppress volume variation and resulted capacity decay during charge–discharge process. Herein, hollow-structured CoNiSe2 dual transition wrapped in a carbon shell (HS-CoxNiySe2@C) were deliberately designed prepared through sequential coating polyacrylonitrile (PAN), ion exchange ZIF-67 with Ni2+ ions, carbonization/selenization. The hollow structure was evidenced by transmission electron microscopy, crystalline confirmed X-ray diffraction. ample internal space HS-CoxNiySe2@C effectively accommodated expansion charge discharge processes, large surface area enabled sufficient contact between electrode electrolyte shortened diffusion path sodium ions feasible electrochemical reaction. ionic conductivity strongly dependent on ratio Co Ni. synergistic effect Ni enhanced mobility HS-CoxNiySe2@C, thereby improving transfer efficiency. By taking into account structural advantages rational selenide ratios, significant improvements can be achieved cycling performance, rate overall stability batteries. optimized demonstrated reversible remained at 334 mAh g−1 after 1000 cycles high current 5.0 A g−1.

Language: Английский

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Tin Phosphide Hollow Nanospheres Enveloped by MXene as a Conversion‐Type Anode Enabling Rapid and Stable Ion Storage in Diverse Energy Storage Systems

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract The design of a single anode material compatible with both Li⁺ and Na⁺ storage represents critical advancement in the development advanced lithium‐ion (LIBs) sodium‐ion batteries (SIBs), particularly from cost‐effectiveness perspective. Tin phosphide, conversion‐type material, presents an energy mechanism without specific constraints on ion size or alloy properties can provide high capacity respect to Li Na ions, making it ideal candidate for dual applications LIBs SIBs. However, its large volumetric expansion during conversion reaction low electronic conductivity lead rapid degradation. Herein, coated hollow Sn 4 P 3 sphere structure is designed, wherein nanospheres (Sn HNs) are tightly encapsulated by MXene nanosheets. nanosphere provides space inward expansion, while coating prevents outward enhances conductivity, endowing composite excellent cyclic stability rate capabilities. For storage, exhibits retention 92.75% 95% at 1 A g −1 after 1200 1500 cycles, respectively. remarkable electrochemical demonstrated this study indicate that highly competitive option simultaneous application batteries.

Language: Английский

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In Situ Phase Transformation of Nanoporous Fe₂O₃ Dendrite to Fe₂O₃/FeS₂ Polycrystalline Texture Achieving Superior Rate Capability and Ultra‐Long Cycling Stability with High Capacity

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Structural design combined with crystal engineering is an external and internal modifying strategy for metal oxides sulfides as anode materials lithium/sodium‐ion batteries (LIBs/SIBs). In this paper, the low‐cost iron‐based oxide of Fe 2 O 3 shaped into dendritic nanostructure locally in situ phase converted to FeS form porous /FeS polycrystalline texture. The maintains original porous, cross‐linked low‐dimension structural advantages precursor electron transport ions exchange alleviating volume expansion. Then, abundant heterogeneous dramatically enhances diffusion stability at boundary. prepared achieves superior rate capability ultra‐long cycling high capacity both LIBs SIBs. Specially, it shows 1017 1016 mAh g −1 10 A SIBs, separately. After 3000 cycles, electrodes maintain 266 279 addition, LiFePO 4 //Fe (Na V (PO ) )//Fe full cells are successfully packaged also show satisfactory electrochemical performances.

Language: Английский

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Cu@MOF based composite materials: High performance anode electrodes for lithium-ion and sodium-ion batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 104, P. 114570 - 114570

Published: Nov. 13, 2024

Language: Английский

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Synthesis of yolk-shell structured microspheres consisting of heterogeneous nickel cobalt selenide@nickel cobalt selenite core–shell nanospheres and their application of anode materials for sodium-ion batteries

Applied Surface Science, Journal Year: 2024, Volume and Issue: unknown, P. 162094 - 162094

Published: Dec. 1, 2024

Language: Английский

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Ultra-high pseudocapacitive contribution in free-standing O-Cu2Se/Cu electrode induces excellent kinetics and stability for sodium-ion storage

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158310 - 158310

Published: Dec. 9, 2024

Language: Английский

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