Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (6): 1641-1650.doi: 10.19799/j.cnki.2095-4239.2020.0199

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Research progress of the organic acid of the hydrometallurgical recovery technology in spent Li ion batteries

Linlin LI(), Linjuan CAO, Yongxiong MAI, Yifei MEN, Wei YANG(), Shengzhou CHEN   

  1. College of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China
  • Received:2020-06-02 Revised:2020-07-06 Online:2020-11-05 Published:2020-10-28
  • Contact: Wei YANG E-mail:764169405@qq.com;wyang@zhu.edu.cn

Abstract:

In the recent years, the number of spent lithium-ion batteries has rapidly increased with the popularity of electric vehicles. Hence, the development of a recycling technology has become an urgent matter from the viewpoint of environmental protection and resource utilization. However, the recycling technology for spent lithium-ion batteries has not been widely used because of secondary pollution and high cost, which has consequently resulted to an urgent call for a green, economical, and efficient recycling technology. The hydrometallurgical technology is the most promising technology in recycling spent lithium-ion batteries because of its low energy demand, high purity, and low cost. This paper reviews the effects of organic acids on the hydrometallurgical recovery technology on metal leaching in spent lithium-ion batteries, introduces the characteristics of malic acid, citric acid, oxalic acid, and other organic acids in the acid leaching process, compares the reaction conditions of various organic acids in the leaching process and the efficiency of metal leaching, and analyzes the leaching kinetics between organic acids and active substances during the leaching process. The comprehensive analysis shows that the factors affecting metal leaching can be optimized; the metal leaching efficiency can be improved; and the overall recovery efficiency of the hydrometallurgical recovery technology can be elevated by exploring the leaching kinetics. In the future, the leaching kinetics of organic acids is expected to become an important research direction in the hydrometallurgical recovery process.

Key words: spent lithium-ion batteries, hydrometallurgy, organic acid, mechanis

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