Preactivation Strategy for a Wide Temperature Range Gel Electrolyte-Based LiNiCoMnO∥Si-Graphite Battery.

The silicon-based anode has been regarded as the most competitive anode candidate for next-generation lithium-ion batteries based on its high theoretical specific capacity. However, the severe volume expansion of the anode leads to undesirable cycling performance, hindering its further application in full cells. In this work, a preactivation method is carried out in a LiNiCoMnO∥Si-graphite battery with an gel electrolyte composed of carbonate solvents, lithium hexafluorophosphate (LiPF), β-cyanoethyl ether of poly(vinyl alcohol) (PVA-CN), and additive lithium difluoro(oxalato)borate (LiDFOB).