Conductive\nPolymer Binder-Enabled SiO–Sn_<i>x</i>Co_<i>y</i>C_<i>z</i> Anode for\nHigh-Energy Lithium-Ion Batteries

Abstract

A SiOSnCoC composite anode is assembled\nusing a conductive polymer\nbinder for the application in next-generation high energy density\nlithium-ion batteries. A specific capacity of 700 mAh/g is achieved\nat a 1C (900 mA/g) rate. A high active material loading anode with\nan areal capacity of 3.5 mAh/cm² is demonstrated by mixing\nSiOSnCoC with graphite. To compensate for the lithium loss in the\nfirst cycle, stabilized lithium metal powder (SLMP) is used for prelithiation;\nwhen paired with a commercial cathode, a stable full cell cycling\nperformance with a 86% first cycle efficiency is realized. By achieving\nthese important metrics toward a practical application, this conductive\npolymer binder/SiOSnCoC anode system presents great promise to enable\nthe next generation of high-energy lithium-ion batteries.