硅
材料科学
流变学
电极
化学工程
泥浆
X射线光电子能谱
小角X射线散射
散射
复合材料
化学
光电子学
光学
物理化学
物理
工程类
作者
Mary K. Burdette-Trofimov,Beth L. Armstrong,Alexander M. Rogers,Luke Heroux,M. Doucet,Guang Yang,Nathan D. Phillip,Michelle K. Kidder,Gabriel M. Veith
标识
DOI:10.1021/acs.jpcc.0c03660
摘要
The conformation of poly(acrylic acid) (PAA) as a function of shear during slurry processing to construct silicon-based anodes is elucidated via rheology-coupled ultra-small-angle neutron scattering (rheo-USANS). Rheo-USANS shows that PAA with encapsulated silicon exists as discrete aggregates that do not interact with one another. As a result, a well-connected matrix of silicon and carbon black dispersed in PAA does not exist; thus, the electrode is inhomogeneous. Raman mapping and X-ray photoelectron spectroscopy were used to confirm the electrode heterogeneity and further understand the cycling properties. These results are correlated to silicon surface chemistry to provide a pathway to making better electrodes.
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