Microanalysis of the Substances in Positive and Negative Electrodes of a LiMn2O4 Battery for Road Vehicles under Over-charge and Over-dischargeHongwei Wang, Jun Liu, Zhengjian Gu, Haiqing Xiao, Yusong Zhu and Qing ZhangE3S Web Conf., 299 (2021) 03004DOI: https://doi.org/10.1051/e3sconf/202129903004