Interfacing Electrolytes with Electrodes in Li Ion Batteries

Kang Xu (U.S. Army Research Laboratory)

Interphases within Li ion batteries remain the least understood component despite their importance in preserving chemical reversibility as well as dictating the kinetics of Li+-intercalation chemistries. The former relates to cycle/calendar life, while the latter to the power density or rate capability of a Li ion device. In particular, the formation mechanism, chemistry and morphology hierarchy of these interphases have been the topics that have been attracting intensive attention in recent years. In this talk, a general overview of the interphasial processes in Li ion and other "beyond Li ion" chemistries will be conducted, a few new techniques developed at ARL will be reviewed, and challenges to be addressed by other new approaches will be summarized.

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