Ion Transport and Electrochemical Reaction in LiNi0.5Co0.2Mn0.3O2-Based High Energy/Power Lithium-Ion Batteries

Jinmei Xu; Jiandong Yang; Shaofei Wang; Jiangmin Jiang; Quanchao Zhuang; Xiangyun Qiu; Kai Wu; Honghe Zheng

doi:10.3390/nano13050856

Ion Transport and Electrochemical Reaction in LiNi_0.5Co_0.2Mn_0.3O₂-Based High Energy/Power Lithium-Ion Batteries

Nanomaterials (Basel). 2023 Feb 25;13(5):856. doi: 10.3390/nano13050856.

Authors

Jinmei Xu^{1

2}, Jiandong Yang², Shaofei Wang², Jiangmin Jiang³, Quanchao Zhuang³, Xiangyun Qiu⁴, Kai Wu², Honghe Zheng¹

Affiliations

¹ College of Energy, Soochow University, Suzhou 215006, China.
² Contemporary Amperex Technology Co., Ltd., Ningde 352100, China.
³ School of Material and Physics, China University of Mining and Technology, Xuzhou 221116, China.
⁴ Power & Energy Storage System Research Center, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China.

Abstract

The high energy/power lithium-ion battery using LiNi_0.5Co_0.2Mn_0.3O₂ (NCM523 HEP LIB) has an excellent trade-off between specific capacity, cost, and stable thermal characteristics. However, it still brings a massive challenge for power improvement under low temperatures. Deeply understanding the electrode interface reaction mechanism is crucial to solving this problem. This work studies the impedance spectrum characteristics of commercial symmetric batteries under different states of charge (SOCs) and temperatures. The changing tendencies of the Li⁺ diffusion resistance R_ion and charge transfer resistance R_ct with temperature and SOC are explored. Moreover, one quantitative parameter, § ≡ R_ct/R_ion, is introduced to identify the boundary conditions of the rate control step inside the porous electrode. This work points out the direction to design and improve performance for commercial HEP LIB with common temperature and charging range of users.

Keywords: NCM523 HEP LIB; de Levie-Finite Length Pore-Ls; § ≡ Rct/Rion.

Grants and funding

The project was supported by the National Natural Science Foundation of China (21875154, 21473120), the National High Technology Research and Development Program of China (2015AA034601), and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (BK20190829).