Dual-modification of Gd2O3 on the high-voltage electrochemical properties of LiNi0.8Co0.1Mn0.1O2 cathode materials via the solid-state method

• Published in: Journal of solid state electrochemistry 2020-04, Vol.24 (4), p.863-872
• Main Authors: Li, Yunjiao, Chang, Shenghong, Zheng, Junchao, Zhang, Dianwei, Yang, Jiachao, Chen, Yongxiang, Guo, Jia, Zhu, Jie, Xiong, Yike, Li, Wei
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemical analysis; Electrochemistry; Electrode materials; Electrode polarization; Energy Storage; Gadolinium; Gadolinium oxides; Original Paper; Physical Chemistry; Solid state; Structural stability; Voltage drop
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-020-04523-3

In this paper, the dual-modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 via Gd 2 O 3 is successfully obtained by the solid-state method. The phenomenon of Li/Ni cation mixing and structural stability of materials has been improved after Gd 2 O 3 modification. Additionally, the lower average discharge voltage drop (Δ E d ) and electrochemical polarization of the batteries are obtained after modification. Simultaneously, the dual-modified material via Gd 2 O 3 exhibits the high capacity retention of 94.50% compared with that (83.40%) of the Pristine (3.0–4.4 V, 1 C (180 mA g −1 ), 25 °C, after 100 cycles). The excellent electrochemical properties ascribe to the higher bond dissociation energies of Gd-O (716 kJ mol −1 ) and the stable coating layer of Gd 2 O 3 .