Al, Zr dual-doped cobalt-free nickel-rich cathode materials for lithium-ion batteries
作者机构：School of Metallurgy and Environment Central South University BASF ShanShan Battery Materials Co. LTD Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy Central South University
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2023年第33卷第1期
页 面：108-115页
核心收录：
学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China (52122407, 62033014, 51874360, 52174285) the Natural Science Foundation for Distinguished Young Scholars of Hunan Province(2020JJ2047) the Science and Technology Innovation Program of Hunan Province (2022RC3048) the Key Research and Development Program of Yunnan Province (202103AA080019) the Innovation-Driven Project of Central South University (2020CX027)
主 题：Lithium-ion batteries Ni-rich Co-free Layered oxide cathode Dual-doping
摘 要：Nickel-rich and cobalt-free cathode materials have obvious advantages in the aspects of energy density and economic efficiency. However, these materials are restricted from being used in commercial lithium-ion batteries due to the problems of poor structural stability and rate capability. In this study, the aluminum and zirconium dual-doped Co-free Ni-rich LiNi0.96Mn0.04O2cathode material(NMAZ) is prepared by a facile high-temperature solid-phase method. The obtained NMAZ shows low cation disordering degree owing to the stability of transition metal slabs induced by strong Al–O and Zr–O bonds. Besides, the kinetics of lithium-ion diffusion is significantly improved by larger c-axis and the fast lithium-ion conducting Li2ZrO3layer on the interface. As a result, NMAZ shows an improved capacity retention of 70.3% at 1C after 100 cycles under an elevated temperature(45°C), compared with 50.5% of pure LiNi0.96Mn0.04O2. In addition, it exhibits splendid rate performance even at higher C-rate and better thermal stability compared to bare LiNi0.96Mn0.04O2. Hence, the Al, Zr dualdoped modification is beneficial to improving the structural stability and electrochemical performance of the Ni-rich and Co-free layered oxide cathodes for Li-ion batteries.
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