Effects of lithium difluoro(oxalate)borate on the performance of Li-rich composite cathode in Li-ion battery

► Effect of 2 wt.% LiDFOB/LiBOB on Li-rich composite based cells was investigated. ► About 92% of initial capacity after 100 cycles was preserved in LiDFOB added cells. ► Utilization of LiDFOB has the positive effect on the rate capability of cells. ► Improved performances of LiDFOB added cells are due to thin and stable SEI films.