Phosphorus modification of Li-rich and Mn-based Li1.2[Co0.13Ni0.13Mn0.54]O2 cathode material for lithium-ion battery
BAN Li-qing1,2, GAO Min1,2, PANG Guo-yao1,2, BAI Xiang-tao1,2, LI Zhao1,2, ZHUANG Wei-dong1,2
1. General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. China Automotive Battery Research Institute Co., Ltd., Beijing 101400, China
Abstract：The enhanced electrochemical performance of the lithium-rich solid solution Li1.2[Co0.13Ni0.13Mn0.54]O2 (LMNCO) cathode was enhanced by phosphorus incorporation. The various phosphorus contents were introduced by adding NH4H2PO4 into the raw materials. The pristine sample and the sulfur incorporated samples were characterized by X-ray diffraction(XRD), high resolution transmission electron microscopy(HRTEM), electrochemical impedance spectroscopy(EIS). Electrochemical performance was assessed by measuring parameters such as charge and discharge capacity, rate capability in lithium ion cells. The results show that the LMNCOP-03 material has the best initial discharge capacity of 280 mAh·g-1. Moreover, it has about 212.2 mAh·g-1 and 170.6 mAh·g-1 at 1.0 C and 3.0 C rate, respectively. The LMNCOP-03 material shows an improved rate performance attributed to the enhanced electrical conductivity and lithium ion diffusion, which is proved by EIS tests.
班丽卿, 高敏, 庞国耀, 柏祥涛, 李钊, 庄卫东. 富锂锰基Li1.2[Co0.13Ni0.13Mn0.54]O2锂离子正极材料的磷改性研究[J]. 材料工程, 2020, 48(7): 103-110.
BAN Li-qing, GAO Min, PANG Guo-yao, BAI Xiang-tao, LI Zhao, ZHUANG Wei-dong. Phosphorus modification of Li-rich and Mn-based Li1.2[Co0.13Ni0.13Mn0.54]O2 cathode material for lithium-ion battery. Journal of Materials Engineering, 2020, 48(7): 103-110.
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2020, Vol. 48 
