A fast ionic conductor and stretchable solid electrolyte artificial interphase layer for Li metal protection in lithium batteries

Lithium nitride (LiN) and stretchable polymer solid electrolyte which conduct Li ions and blocks electrons are synthesized and applied to fabricate self-healing artificial solid electrolyte interface layer aiming to solve the issue of electrochemical degradation in Li electrodes. An ingenious artificial solid electrolyte interface layer by in situ reaction of CuN with Li metal using CuN particles and solid electrolyte is designed. The artificial LiN solid electrolyte interface (SEI) layer can restrain the unfavorable reaction between the Li metal and the electrolyte and Li dendrite growth can also be restrained in Lithium batteries. It is found that the LiN layer exhibit exceptional abilities of promoting battery lifetime and stabilizing the cycling behavior after galvanostatic measurements are performed on both symmetric cells and Li/LiTiO half cells