Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 11, 2024

Abstract Transition‐metal selenides hold great promise as advanced anode candidates for fast‐charging sodium‐ion batteries. However, an unstable solid electrolyte interphase (SEI) caused by their enormous volume expansion and strong catalytic action results in the continuous degradation of sodium‐storage performance with cycling. Herein, a novel structure carbon nanotubes bridging adjacent layers Mxene is constructed host material, which can enrich transport paths electrons ions within electrode triggering two‐electron reaction during decomposition, thereby tailoring ultrathin robust SEI rich Na 2 O inorganic component. Thus prepared demonstrates improved initial Coulombic efficiency (87%) cycling lifespan (442.9 mAh g −1 at 5 A after 1470 cycles). Meanwhile, it delivers high‐rate capacity 394.3 up to 20 , accomplishes retention above 90% current density transitions from 10 . Even when increases cycles, still higher than 90%. This study illustrates feasibility components through engineering opens new avenue controllable modulation electrode‐electrolyte interfacial chemistry.

Язык: Английский