文献类型：期刊文献

英文题名：Synergistic Effect of Na and B Co-Doping on the Electrochemical Properties of LiNi0.865Co0.095Al0.04O2 Cathode Materials for Li-Ion Batteries

作者：Ge, Wujie Fu, Yuanxiang Wang, Chaonan Yan, Lirong Feng, Qi Yan, Bing Li, Xiang

第一作者：Ge, Wujie

机构：[1] Department of Materials Science and Engineering, Shanxi Institute of Technology, Yangquan, 045000, China; [2] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [3] Materials Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China

第一机构：Department of Materials Science and Engineering, Shanxi Institute of Technology, Yangquan, 045000, China

年份：2025

外文期刊名：SSRN

收录：EI(收录号：20250103560)

语种：英文

外文关键词：Aluminum compounds - Cobalt alloys - Crystal lattices - Lithium compounds - Semiconductor doping - Single crystals

摘要：The high-nickel cathode material LiNi0.865Co0.095Al0.04O2 (NCA) has garnered significant attention due to its high energy density and cost-effectiveness in production. However, this material is also prone to rapid capacity degradation, primarily due to phase transitions occurring during the redox process. In this paper, the co-modification with Na and B cations is employed to stabilize the lattice structure and enhance the electrochemical performance of the NCA material. It can be found that the incorporation of Na and B cations in the lattice can reduce cation mixing, expand the Li-layer spacing and improve crystal stability, thereby increasing the specific capacity and cyclic stability of the NCA material. Specifically, the co-doped NCA-2 sample exhibits a specific capacity of 202.1 mAh/g at 0.1 C and maintains a capacity retention of 78.75% at 1 C after 300 cycles, representing a substantial improvement over the pristine material (187.2 mAh/g and 61.68% capacity retention). Moreover, at a current density of 10 C, the co-doped NCA-2 sample demonstrates a high specific capacity of 133.9 mAh/g, compared to 110.1 mAh/g for the pristine material. The Na/B co-doping strategy presented in this study offers a straightforward method to improve the cyclability and rate behavior of cathode materials, highlighting its potential for commercial applications. ? 2025, The Authors. All rights reserved.