3D Structure Analysis for Understanding of Li Electrodeposition and Dissolution Mechanism

Li metal was electrodeposited and electrochemically dissolved on an ultra-micro-electrode to model the transition of morphology three-dimensional structure a electrode during cycles. The first electrodeposition produced uniform dense column structure, but solid electrolyte interphase (SEI) remained next electrochemical dissolution. accumulation SEI residue obstructs in following cycles increases resistance, accelerating degradation causing isolated form “dead lithium.”