阳极
材料科学
硅
小角X射线散射
石墨烯
电化学
粒子(生态学)
电池(电)
粒径
氧化物
化学工程
纳米技术
纳米颗粒
离子
散射
电极
冶金
化学
光学
工程类
物理
有机化学
功率(物理)
海洋学
量子力学
物理化学
地质学
作者
Sashini Neushika Sue Hapuarachchi,Michael W. M. Jones,Kimal Chandula Wasalathilake,Ifra Marriam,Jawahar Nerkar,Nigel Kirby,Dumindu P. Siriwardena,Joseph F. S. Fernando,Dmitri Golberg,Anthony P. O’Mullane,Junchao Zheng,Yan Chen
标识
DOI:10.1002/smtd.202301199
摘要
Abstract Silicon (Si) is recognized as a promising anode material for next‐generation anodes due to its high capacity. However, large volume expansion and active particle pulverization during cycling rapidly deteriorate the battery performance. The relationship between Si anode particle size and particle pulverization, and the structure evolution of Si particles during cycling is not well understood. In this study, a quantitative, time‐resolved “ operando ” small angle X‐ray scattering (SAXS) investigation into the morphological change of unwrapped and reduced graphene oxide (rGO) wrapped Si nanoparticles (Si@rGO) is conducted with respect to the operating voltage. The results provide a clear picture of Si particle size change and the role of nonrigid rGO in mitigating Si volume expansion and pulverization. Further, this study demonstrates the advantage of “ operando ” SAXS in electrochemical environments as compared to other approaches.
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