期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 873, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159808
关键词
Lithium-ion battery; Cathode; Recycling; Sodium; Rate and cycle capability
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Republic of Korea [2020R1A6A1A03038540]
- Ministry of Science and ICT, Republic of Korea [2020R1F1A1053911]
- Korea Ministry of Environment, Republic of Korea (MOE)
- National Research Foundation of Korea [2020R1F1A1053911] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study shows that Na from the leachate of spent LIBs can be incorporated into the resynthesized cathode active materials, which is beneficial for improving battery performance.
The explosion of spent Li-ion batteries (LIBs) during the LIB recycling process is often avoided by the discharging process where spent LIBs are soaked into NaCl solutions. Because Na can be incorporated into resynthesized cathode active materials, we synthesize LiNi0.8Co0.1Mn0.1O2 active materials with extra Na in the simulated coprecipitation solution whose composition was matched to the actual industrial leachate composition. The morphological, structural, and electrochemical properties of the active materials are investigated. The addition of Na does not affect the precursor particle growth during the coprecipitation and the resulting morphology of active materials. Structural analyses show that Na-containing active materials have a favorable environment for the diffusion of Li ions. Overall, Na from the leachate of spent LIBs could be incorporated into the resynthesized cathode active materials unless they are washed thoroughly. Although excessive Na affects the electrochemical properties of cathode active materials adversely, the residual Na after the thorough washing has a beneficial effect on cyclability and rate performance as confirmed by low charge transfer and surface film resistances and high Li ion coefficients. (c) 2021 Elsevier B.V. All rights reserved.
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