Hengjun Liu, Feihu Zou, Shuxuan Liao, Yuanyuan Pan, Zhiqiang Zhao, Fangchao Gu, Xixiang Xu, Xiancheng Sang, Yuanyuan Han, Zeyuan Bu, Lihao Qin, Yukui Wang, Guihuan Chen, Mingyue Ruan, Qinghao Li, Han Hu, Qiang Li
Batteries with intercalation-conversion-type electrodes tend to achieve high-capacity storage, but the complicated reaction process often suffers from confusing electrochemical mechanisms. Here, we reinterpreted the essential issue about the potential of the conversion reaction and whether there is an intercalation reaction in a lithium/sodium-ion battery (LIB/SIB) with the FeP anode based on the evolution of the magnetic phase. Especially, the ever-present intercalation process in a large voltage range followed by the conversion reaction with extremely low potential was confirmed in FeP LIB, while it is mainly the conversion reaction for the sodium storage mechanism in FeP SIB...
April 24, 2024: Journal of Physical Chemistry Letters