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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...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2020
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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. |
format | Online Article Text |
id | pubmed-7393980 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
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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