纳米孔
电极
材料科学
锂(药物)
集电器
电池(电)
镍
化学工程
离子
体积热力学
纳米技术
电解质
化学
冶金
有机化学
医学
功率(物理)
物理
量子力学
内分泌学
物理化学
工程类
作者
Haoyu Wang,Huanyan Liu,Tao Pan,Shichao Zhang,Wenbo Liu
标识
DOI:10.1002/smtd.202400411
摘要
Abstract Sn‐based materials with high capacity showcase great potential for next‐generation lithium‐ion batteries (LIBs). Yet, the large volume change and limited ion/electron transfer efficiency of Sn‐based materials upon operation significantly compromises the battery performance. In this study, a unique 3D copper‐nickel nanoporous column array current collector is rationally developed via a facile template‐free galvanostatic electrodeposition method, followed by electrodepositing SnS active material onto it (denoted as 3D SnS@CNCA). Excitingly, the morphology of the 3D SnS@CNCA electrode perfectly inherited the nanoporous column array structure of the 3D current collector, which not only endows the electrode with a large specific surface area to provide more active sites and sufficient ion/electron transport pathways, but also effectively alleviates the volume expansion of SnS upon repeated charge–discharge cycles. Therefore, the binder‐free 3D SnS@CNCA electrode showcases a significantly enhanced Li storage performance, showing a high initial reversible capacity of 1019.7 mAh g −1 with noteworthy cycling stability (a capacity retention rate of 89.4% after 200 cycles). Moreover, the designed electrode also manifests high rate performance with a high capacity of 570.6 mAh g −1 at 4 A g −1 . This work provides a novel design idea for the preparation of high‐performance electrodes beyond LIBs.
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