阳极
材料科学
基质(水族馆)
离子
锡
灵活性(工程)
储能
电极
粒子(生态学)
纳米技术
导电体
数码产品
图层(电子)
复合材料
化学
物理
冶金
热力学
功率(物理)
海洋学
统计
数学
有机化学
物理化学
地质学
作者
Shujin Cheng,Zicheng Zuo,Yuliang Li
标识
DOI:10.1002/advs.202401240
摘要
Abstract Efficiently reconciling the substantial volume strain with maintaining the stabilities of both interfacial protection and three‐dimensional (3D) conductive networks is a scientific and technical challenge in developing tin‐based anodes for sodium ion storage. To address this issue, a proof‐of‐concept self‐adaptive protection for the Sn anode is designed, taking advantage of the arbitrary substrate growth of graphdiyne. This protective layer, employing a flexible chain doping strategy, combines the benefits of 2D graphdiyne and linear chain structures to achieve 2D mechanical stability, electronic and ion conductions, ion selectivity, adequate elongation, and flexibility. It establishes close contact with the Sn particles and can adapt to dynamic size changes while effectively facilitating both electronic and ion transports. It successfully mitigates the detrimental effects of particle pulverization and coarsening induced by large‐volume changes. The as‐obtained Sn electrodes demonstrate exceptional stability, enduring 1800 cycles at a high current density of 2.5 A g −1 . This strategy promises to address the general issues associated with large‐strain electrodes in next‐generation of high‐energy‐density batteries.
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