Origin of zonal polarization in Mn3+/Mn2+ plateau and its influence on the electrochemical performance of LiMnγFe1− γPO4
Origin of zonal polarization in Mn3+/Mn2+ plateau and its influence on the electrochemical performance of LiMnγFe1− γPO4
研究概述
研究锰铁磷酸锂中Mn分布引起的无序锂占位，揭示其阻塞一维锂空位通道并导致低电压Mn3+还原平台。循环中金属离子占据锂位进一步恶化扩散；提出以该低电压反应比例描述占位无序、倍率性能及循环衰退。
谱图与表征信息
Fig. 5. Mn K-edge XAS spectra (a) and corresponding WT-EXAFS results (b) of LMFP; Li+ migration energy barriers of LMFP at MnI reaction region (c1, d1) and MnII