Carbon Nanotube Intertwined Nano‐Nested Heterojunction Cubes with Double Shell Layers FeSe2‐CoSe2@NC for Efficient Lithium/Sodium Ion Storage Anode DOI

Jia‐Ting Lei,

Wan‐Xin Wen,

Peipei Chen

et al.

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

Published: April 22, 2025

Abstract Transition metal selenides (TMSes) have been extensively researched as anode materials of lithium/sodium‐ion batteries (LIBs/SIBs). However, the serious volume expansion, unsatisfying initial coulombic efficiency (ICE), and ion diffusion extremely limited their further application. Therefore, nanostructure design construction heterogeneous structures can effectively alleviate above problems. Herein, elaborately designed carbon nanotube‐intertwined nano‐nested heterojunction cubes, FeSe 2 ‐CoSe @NC (FeSe @NC/CNT), with unique double shell layers, are successfully prepared. Electrochemical tests theoretical calculations show that transition selenide heterostructures CNTs inter‐transfer networks promotes transport kinetics. Furthermore, double‐layer nested cubic structure contributes to alleviating expansion over charging/discharging. Thanks these merits, @NC/CNT composite exhibits enhanced Li + storage capacity (1479.7 mAh g −1 after 500 cycles at a high current density A ), outstanding rate capabilities. When used in SIB, is maintained 300.1 for 1 . In addition, full cell displays nice reversible 100.1 0.5 C cycling 115 cycles, demonstrating vast potential feasible synthesis, superior performance, efficient lithium/sodium anodes.

Language: Английский

Carbon Nanotube Intertwined Nano‐Nested Heterojunction Cubes with Double Shell Layers FeSe2‐CoSe2@NC for Efficient Lithium/Sodium Ion Storage Anode DOI

Jia‐Ting Lei,

Wan‐Xin Wen,

Peipei Chen

et al.

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

Published: April 22, 2025

Abstract Transition metal selenides (TMSes) have been extensively researched as anode materials of lithium/sodium‐ion batteries (LIBs/SIBs). However, the serious volume expansion, unsatisfying initial coulombic efficiency (ICE), and ion diffusion extremely limited their further application. Therefore, nanostructure design construction heterogeneous structures can effectively alleviate above problems. Herein, elaborately designed carbon nanotube‐intertwined nano‐nested heterojunction cubes, FeSe 2 ‐CoSe @NC (FeSe @NC/CNT), with unique double shell layers, are successfully prepared. Electrochemical tests theoretical calculations show that transition selenide heterostructures CNTs inter‐transfer networks promotes transport kinetics. Furthermore, double‐layer nested cubic structure contributes to alleviating expansion over charging/discharging. Thanks these merits, @NC/CNT composite exhibits enhanced Li + storage capacity (1479.7 mAh g −1 after 500 cycles at a high current density A ), outstanding rate capabilities. When used in SIB, is maintained 300.1 for 1 . In addition, full cell displays nice reversible 100.1 0.5 C cycling 115 cycles, demonstrating vast potential feasible synthesis, superior performance, efficient lithium/sodium anodes.

Language: Английский

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