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REWAS 2019 pp 421-435 | Cite as

Study on Vacuum Pyrolysis Process of Cathode Sheets from Spent Lithium-Ion Batteries

  • Weilun Li
  • Shenghai Yang
  • Nannan Liu
  • Yongming ChenEmail author
  • Yan Xi
  • Shuai Li
  • Yafei Jie
  • Fang Hu
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Spent lithium-ion batteries(LIBs) contain lots of valuable metals such as nickel, cobalt, and lithium, together with organic solvents, binders, and other toxic materials. Therefore, recycling of spent LIBs is of great importance for comprehensive resource recovery and environmental protection. In this study, vacuum pyrolysis was used to dispose of the cathode sheets of LIBs. The effects of pyrolysis temperature and vacuum degree on the separation of cathode sheets and phase transition of valuable metal of cathode active powder were investigated in detail. The results showed that the effective separation of active powder and Al foil can be achieved under the optimized conditions of pyrolysis temperature of 600 °C and a vacuum degree of 1000 Pa, and the recovery rate of cathode active powder reached 98.04%. In the temperature range of 450–650 °C, with the increase of pyrolysis temperature, the XRD patterns of the cathode active powder showed that the characteristic peak of Li[NixCoyMn1-x-y]O2 gradually weakened and eventually disappeared.

Keywords

Vacuum pyrolysis Spent lithium ion batteries Cathode sheets Recovery rate Phase transition 

Notes

Acknowledgements

We are grateful to Anhui Province Research and Development Innovation Project for Automotive Power Battery Efficient Recycling System and the Research Fund Program of State Key Laboratory of Rare Metals Separation and Comprehensive Utilization (No. GK-201806) for providing financial support.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Weilun Li
    • 1
  • Shenghai Yang
    • 1
  • Nannan Liu
    • 1
  • Yongming Chen
    • 1
    Email author
  • Yan Xi
    • 1
  • Shuai Li
    • 1
  • Yafei Jie
    • 1
  • Fang Hu
    • 2
  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangsha HunanChina
  2. 2.College of Chemistry and Chemical EngineeringCentral South UniversityChangsha HunanChina

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