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Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance

The existence of residual lithium compounds (RLCs) on the surface of layered Ni-rich materials will deteriorate the electrochemical properties and cause safety problem. This work presents an effective surface washing method to remove the RLCs from LiNi(0.90)Co(0.06)Mn(0.04)O(2) material surface, via...

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Autores principales: Su, Yuefeng, Chen, Gang, Chen, Lai, Li, Linwei, Li, Cong, Ding, Rui, Liu, Jiahui, Lv, Zhao, Lu, Yun, Bao, Liying, Tan, Guoqiang, Chen, Shi, Wu, Feng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7393980/
https://www.ncbi.nlm.nih.gov/pubmed/32793553
http://dx.doi.org/10.3389/fchem.2020.00573
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author Su, Yuefeng
Chen, Gang
Chen, Lai
Li, Linwei
Li, Cong
Ding, Rui
Liu, Jiahui
Lv, Zhao
Lu, Yun
Bao, Liying
Tan, Guoqiang
Chen, Shi
Wu, Feng
author_facet Su, Yuefeng
Chen, Gang
Chen, Lai
Li, Linwei
Li, Cong
Ding, Rui
Liu, Jiahui
Lv, Zhao
Lu, Yun
Bao, Liying
Tan, Guoqiang
Chen, Shi
Wu, Feng
author_sort Su, Yuefeng
collection PubMed
description The existence of residual lithium compounds (RLCs) on the surface of layered Ni-rich materials will deteriorate the electrochemical properties and cause safety problem. This work presents an effective surface washing method to remove the RLCs from LiNi(0.90)Co(0.06)Mn(0.04)O(2) material surface, via ethyl alcohol solution that contains low concentration of boric acid. It is a low-cost process because the filter liquor can be recycled. The optimal parameters including washing time, boric acid concentration, and solid–liquid ratio were systematically studied. It has been determined by powder pH and Fourier transform infrared spectra results that the amount of RLCs was reduced effectively, and the storage performance was significantly enhanced for the washed samples. The 150th capacity retentions after storing had increased from 68.39% of pristine material to 85.46–94.84% of the washed materials. The performance enhancements should be ascribed to the surface washing process, which removed not only the RLCs, but also the loose primary particles effectively.
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spelling pubmed-73939802020-08-12 Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance Su, Yuefeng Chen, Gang Chen, Lai Li, Linwei Li, Cong Ding, Rui Liu, Jiahui Lv, Zhao Lu, Yun Bao, Liying Tan, Guoqiang Chen, Shi Wu, Feng Front Chem Chemistry The existence of residual lithium compounds (RLCs) on the surface of layered Ni-rich materials will deteriorate the electrochemical properties and cause safety problem. This work presents an effective surface washing method to remove the RLCs from LiNi(0.90)Co(0.06)Mn(0.04)O(2) material surface, via ethyl alcohol solution that contains low concentration of boric acid. It is a low-cost process because the filter liquor can be recycled. The optimal parameters including washing time, boric acid concentration, and solid–liquid ratio were systematically studied. It has been determined by powder pH and Fourier transform infrared spectra results that the amount of RLCs was reduced effectively, and the storage performance was significantly enhanced for the washed samples. The 150th capacity retentions after storing had increased from 68.39% of pristine material to 85.46–94.84% of the washed materials. The performance enhancements should be ascribed to the surface washing process, which removed not only the RLCs, but also the loose primary particles effectively. Frontiers Media S.A. 2020-07-24 /pmc/articles/PMC7393980/ /pubmed/32793553 http://dx.doi.org/10.3389/fchem.2020.00573 Text en Copyright © 2020 Su, Chen, Chen, Li, Li, Ding, Liu, Lv, Lu, Bao, Tan, Chen and Wu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Su, Yuefeng
Chen, Gang
Chen, Lai
Li, Linwei
Li, Cong
Ding, Rui
Liu, Jiahui
Lv, Zhao
Lu, Yun
Bao, Liying
Tan, Guoqiang
Chen, Shi
Wu, Feng
Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title_full Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title_fullStr Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title_full_unstemmed Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title_short Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance
title_sort clean the ni-rich cathode material surface with boric acid to improve its storage performance
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7393980/
https://www.ncbi.nlm.nih.gov/pubmed/32793553
http://dx.doi.org/10.3389/fchem.2020.00573
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