New insights into the formation of silicon–oxygen layer on lithium metal anode via in situ reaction with tetraethoxysilane

Lithium metal-based secondary batteries are very promising for next generation power battery due to their high energy density. However, lithium anodes suffer from poor electrochemical reversibility in organic electrolytes Li dendrites and instability of the solid electrolyte interphase. Recent research demonstrated that problem can be alleviated via tetraethoxysilane (TEOS) treated metal form a silicon oxide layer on surface, however, its reaction mechanism is controversial. Herein, we deeply explore between TEOS propose: Fresh directly react with even though no hydroxide exists participation water will accelerate process. Moreover, it was found promote uniform deposition ions by providing lithiophilic nucleation sites, thereby achieving long cycle life batteries.