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Visualization of Electrode–Electrolyte Interfaces in LiPF 6 /EC/DEC Electrolyte for Lithium Ion Batteries via in Situ TEM

2014; American Chemical Society; Volume: 14; Issue: 4 Linguagem: Inglês

10.1021/nl403922u

1530-6992

Zhiyuan Zeng, Wen‐I Liang, Hong‐Gang Liao, Huolin L. Xin, Ying‐Hao Chu, Haimei Zheng,

Electron and X-Ray Spectroscopy Techniques

We report direct visualization of electrochemical lithiation and delithiation of Au anodes in a commercial LiPF6/EC/DEC electrolyte for lithium ion batteries using transmission electron microscopy (TEM). The inhomogeneous lithiation, lithium metal dendritic growth, electrolyte decomposition, and solid-electrolyte interface (SEI) formation are observed in situ. These results shed lights on strategies of improving electrode design for reducing short-circuit failure and improving the performance of lithium ion batteries.