LiBOB as Additive in LiPF[sub 6]-Based Lithium Ion Electrolytes

Lithium bis(oxalato)borate (LiBOB) was tested as an additive in propylene carbonate (PC)-rich electrolytes that uses as the conductive solute. At as low as 5% molar LiBOB showed a distinctive additive effect, i.e., its participation in the initial surface chemistry on graphitic anode surface effectively prevented exfoliation. This property of LiBOB provides an opportunity of formulating PC-rich electrolytes with improvements in rate capabilities and performances at both high and low temperatures, as compared with the electrolytes based on or LiBOB as the sole electrolyte solute.