电解质
阳极
锂(药物)
材料科学
电化学
中子衍射
石墨
离子
电化学电池
分析化学(期刊)
无机化学
化学
电极
复合材料
结晶学
色谱法
晶体结构
物理化学
内分泌学
有机化学
医学
作者
Martin J. Mühlbauer,Dominik Petz,Volodymyr Baran,Oleksandr Dolotko,M. Hofmann,Robert Kostecki,Anatoliy Senyshyn
标识
DOI:10.1016/j.jpowsour.2020.228690
摘要
Carbonate-based electrolytes in Li-ion batteries exhibit long range order in a frozen state, which enables their non-destructive analysis by diffraction methods. In the current study the spatial distribution of lithium and electrolyte inside the graphite anode was determined in cycled Li-ion cells using monochromatic spatially-resolved neutron diffraction measurements at 150 K. The results indicate a loss of lithium and electrolyte and their non-uniform distribution in the graphite anode in aged Li-ion cells. The observed lithium and electrolyte losses are directly correlated with two electrochemical performance degradation mechanisms, which are responsible for the cell capacity fade.
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