锂(药物)
锰
电化学
兴奋剂
磷酸铁锂
磷酸钒锂电池
阴极
无机化学
过渡金属
电池(电)
化学
材料科学
离子电导率
化学工程
电极
光电子学
冶金
物理化学
催化作用
热力学
内分泌学
工程类
功率(物理)
物理
医学
电解质
生物化学
作者
Bo Zhang,Li Wang,Hao Zhang,Hong Xu,Xiangming He
标识
DOI:10.1002/bte2.20220020
摘要
Abstract Lithium iron phosphate (LiFePO 4 ) has been widely used due to its high theoretical capacity and good cycle stability, but lithium manganese phosphate (LiMnPO 4 ) with a higher operating voltage (4.1 V) has not been used, so it is necessary to conduct theoretical research on its inherent performance improvement strategy. The large‐scale application of LiMnPO 4 is limited by its relatively low electronic and ionic conductivity. Improving the electronic and ionic conductivity of electrode materials by selective doping is an effective strategy. To determine the effect of doping of transition metals on the electrochemical properties of LiMnPO 4 and to screen out doping models of cathode materials with excellent battery performance, we established all 3d, 4d, and 5d transition‐metal doping models of LiMnPO 4 . Through screening by first principles, the structural properties, band gap, doping formation energy, elastic properties, isotropy, and lithium/delithium voltage of the above models were compared and analyzed. According to the screening results, LiMnPO 4 doped with Sc, Ti, V, Fe, Co, Mo, Rh, Re, and Ir has excellent electrochemical properties and can be used as a good cathode material for lithium‐ion batteries; the inherent mechanism of the above materials is revealed.
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