储能科学与技术 ›› 2022, Vol. 11 ›› Issue (11): 3548-3557.doi: 10.19799/j.cnki.2095-4239.2022.0606

• • 上一篇    下一篇

  

  • 出版日期:2022-11-05 发布日期:2022-11-09

Study on the effects of carbon coating on lithium-storage kinetics for soft carbon

Fanju MENG1(), Xi ZHANG2, Zhijun QIAO2, Bin YANG3, Miao YU1, Yuzuo WANG2, Dianbo RUAN2()   

  1. 1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
    2.Faculty of Mechanical Engineering and Mechanics, Ningbo University
    3.Hesheng Alternatuve Energy Technology Co. , Ltd. , Ningbo 315211, Zhejiang, China
  • Online:2022-11-05 Published:2022-11-09
  • Contact: Dianbo RUAN E-mail:15110082897@163.com;ruandianbo@nbu.edu.cn
  • About author:MENG Fanju (1991—), male, master, research interests: energy storage, E-mail: 15110082897@163.com; Corresponding author:
    RUAN Dianbo, professor, research interests: advanced energy storage, E-mail: ruandianbo@nbu.edu.cn.
  • Supported by:
    Science and Technology Program of Zhejiang Province(2022C01071);Major Science and technology projects in Ningbo(2022Z026)

Abstract:

Carbon-coating is a simple and practical method to improve the electrochemical performance of soft carbon anode for fast-charging lithium-ion battery, e.g., reducing the loss of active lithium during the formation of the solid electrolyte interface (SEI) film, and thereby improving the initial coulombic efficiency. However, the systematic study of relationships between carbon-coating layer properties and electrochemical performances is still lacking. Therefore, two soft carbon materials with different carbon-coating layers were used as model materials, which were prepared by vapor-phase method and solid-phase method, respectively. SEM, TEM, XRD and Raman were conducted to characterize the structural evolution of the soft carbon in the coating process. CV, GCPL, EIS and GITT were conducted to analyze the electrochemical performance of carbon-coating soft carbon. This work provides a good guidance for the development of fast-charging soft carbon material.

Key words: lithium-ion battery, anode, soft carbon, carbon coating, kinetics

中图分类号: