Tri(ethylene glycol)-substituted trimethylsilane/lithium bis(oxalate)borate electrolyte for LiMn2O4/graphite system

► Tri(ethylene glycol)-substituted trimethylsilane (1NM3)-LiBOB enabled the LiMn2O4/MAG graphite lithium ion battery chemistry. ► This new electrolyte can afford the SEI formation by LiBOB decomposition on the surface of electrode. ► Excellent cycling performance was achieved both at room temperature and at 55 °C, which is comparable with the state-of-the-art electrolyte. ► Activation energy obtained from charge transfer impedance was higher than that of EC/EMC-LiPF6 and 1NM3 solvent has slower kinetics due to the strong coordination with Li+. ► Impedance measurements during first charging process revealed SEI formation by LiBOB decomposition leading to the decrease of the electrolyte conductivity.