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Title: Unveiling the Influence of Carbon Impurity on Recovered NCM622 Cathode Material

Abstract

With the proliferation of market demand for lithium-ion batteries (LIBs) over the past decades, battery recycling has aroused extensive attention due to the environmental, supply, and economic issues caused by waste batteries. Here, the hydrometallurgical recycling method has been widely adopted to recover cathode materials as a result of its wide applicability and high productivity. However, it is hard to completely eliminate impurities such as copper, aluminum, and carbon, which could bring significant impacts on recovered materials. Here, the influence of the carbon impurity on recovered LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode material is systematically investigated. It shows that the carbon impurity promotes nucleation during coprecipitation and forms holes in the cathode secondary particles after sintering which could enhance cyclability of the NCM622 cathode. The cathode with 0.2 atom % of carbon impurity displays the highest capacity of 159.9 mAh/g with a striking capacity retention rate of 97.9% after 100 cycles at 0.33C, but performs worse at high rates. Nonetheless, excess carbon (5 atom %) results in severe cation disorder and lattice distortion which significantly deteriorates the electrochemical properties of the NCM622 cathode. Therefore, it is important to strictly control carbon impurity during the recycling process for spent LIBs.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1]
  1. Worcester Polytechnic Inst., MA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
OSTI Identifier:
1781800
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 9; Journal Issue: 17; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Carbon impurity; Electrochemistry; Hydrometallurgical recycling; LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode; Lithium-ion batteries; Impurities; Precursors; Nanoparticles; Electrodes; Transition metals

Citation Formats

Zheng, Yadong, Zhang, Ruihan, Vanaphuti, Panawan, Fu, Jinzhao, Yang, Zhenzhen, and Wang, Yan. Unveiling the Influence of Carbon Impurity on Recovered NCM622 Cathode Material. United States: N. p., 2021. Web. doi:10.1021/acssuschemeng.1c01510.
Zheng, Yadong, Zhang, Ruihan, Vanaphuti, Panawan, Fu, Jinzhao, Yang, Zhenzhen, & Wang, Yan. Unveiling the Influence of Carbon Impurity on Recovered NCM622 Cathode Material. United States. https://doi.org/10.1021/acssuschemeng.1c01510
Zheng, Yadong, Zhang, Ruihan, Vanaphuti, Panawan, Fu, Jinzhao, Yang, Zhenzhen, and Wang, Yan. Thu . "Unveiling the Influence of Carbon Impurity on Recovered NCM622 Cathode Material". United States. https://doi.org/10.1021/acssuschemeng.1c01510. https://www.osti.gov/servlets/purl/1781800.
@article{osti_1781800,
title = {Unveiling the Influence of Carbon Impurity on Recovered NCM622 Cathode Material},
author = {Zheng, Yadong and Zhang, Ruihan and Vanaphuti, Panawan and Fu, Jinzhao and Yang, Zhenzhen and Wang, Yan},
abstractNote = {With the proliferation of market demand for lithium-ion batteries (LIBs) over the past decades, battery recycling has aroused extensive attention due to the environmental, supply, and economic issues caused by waste batteries. Here, the hydrometallurgical recycling method has been widely adopted to recover cathode materials as a result of its wide applicability and high productivity. However, it is hard to completely eliminate impurities such as copper, aluminum, and carbon, which could bring significant impacts on recovered materials. Here, the influence of the carbon impurity on recovered LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode material is systematically investigated. It shows that the carbon impurity promotes nucleation during coprecipitation and forms holes in the cathode secondary particles after sintering which could enhance cyclability of the NCM622 cathode. The cathode with 0.2 atom % of carbon impurity displays the highest capacity of 159.9 mAh/g with a striking capacity retention rate of 97.9% after 100 cycles at 0.33C, but performs worse at high rates. Nonetheless, excess carbon (5 atom %) results in severe cation disorder and lattice distortion which significantly deteriorates the electrochemical properties of the NCM622 cathode. Therefore, it is important to strictly control carbon impurity during the recycling process for spent LIBs.},
doi = {10.1021/acssuschemeng.1c01510},
journal = {ACS Sustainable Chemistry & Engineering},
number = 17,
volume = 9,
place = {United States},
year = {Thu Apr 22 00:00:00 EDT 2021},
month = {Thu Apr 22 00:00:00 EDT 2021}
}

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