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Journal of Advanced Ceramics

Article Title

Solvents adjusted pure phase CoCO3 as anodes for high cycle stability

Authors

Liming LIU, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Xiaoxiao HUANG, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Zengyan WEI, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Xiaoming DUAN, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Bo ZHONG, School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264009, China
Long XIA, School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264009, China
Tao ZHANG, School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264009, China
Huatao WANG, School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264009, China
Dechang JIA, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Yu ZHOU, Department of Materials Science, School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory of Advanced Structural Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
Rui ZHANG, College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Keywords

lithium ion battery (LIB), cobalt carbonate, solvothermal method, morphological control, solvent, pure phase

Abstract

CoCO3 with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries (LIBs). However, the electrochemical performance of CoCO3 itself, especially the cyclic stability at high current density, hinders its application. Herein, pure phase CoCO3 particles with different particle and pore sizes were prepared by adjusting the solvents (diethylene glycol, ethylene glycol, and deionized water). Among them, CoCO3 synthesized with diethylene glycol (DG-CC) as the solvent shows the best electrochemical performance owing to the smaller particle size and abundant mesoporous structure to maintain robust structural stability. A high specific capacity of 690.7 mAh/g after 1000 cycles was achieved, and an excellent capacity retention was presented. The capacity was contributed by diverse electrochemical reactions and the impedance of DG-CC under different cycles was further compared. Those results provide an important reference for the structural design and stable cycle performance of pure CoCO3.

Publisher

Tsinghua University Press

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