Financially supported by Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) for 2020, and invited by Prof. Junhu Wang, Dr. Moulay Tahar Sougrati (French National Centre for Scientific Research) worked with us in France from 01 May to 31 July, 2021, for carrying for a joint project “Advanced Operando Characterization of Affordable and Abundant Electrode Materials for Energy Storage”.