Investigation on the storage performance of LiMn2O4 at elevated temperature with the mixture of electrolyte stabilizer

In order to investigate the effect of different electrolytes of LiPF6-based and LiPF6-based with the mixed additives of ethanolamine and heptamethyldisilazane on the storage performance of LiMn2O4, the commercial LiMn2O4 are added into these different electrolytes for storing deliberately at 60 °C in air for 4 h. The results show that the electrolyte with additives can prevent LiMn2O4 from being eroded by HF to a certain extent, and improve the storage performance of the material. The initial discharge capacities are 97.7 and 88.4 mAh g−1 at 0.1 and 1 C, respectively, which are much higher than that 84.4 and 63.6 mAh g−1 of LiMn2O4 stored in the electrolyte without additives. Moreover, the former LiMn2O4 retains 89.1 % of its initial discharge capacity at 1 C after 150 cycles, while this is not up to 84 % for the latter.