The effects of lithium bisoxalatoborate (LiBOB) and lithium difluorooxalatoborate (LiDFOB) as electrolyte additives on the high voltage cycling performance of lithium-ion cells are investigated. With traces of 0.2 wt. % LiBOB or 0.5 wt. % LiDFOB added, the cycling performance of Li/LiNi 1/3 Co 1/3 Mn 1/3 O 2 cells charged to 4.6 V is improved. The electrochemical impedance...
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