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 LiNi0.90Co0.06Mn0.04O2 material surface, via ethyl a...
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Frontiers Media S.A.
2020-07-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00573/full |
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doaj-5e9057513b2f4af0a53f18e58e56d9782020-11-25T03:45:02ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-07-01810.3389/fchem.2020.00573549972Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage PerformanceYuefeng Su0Yuefeng Su1Gang Chen2Gang Chen3Lai Chen4Lai Chen5Linwei Li6Cong Li7Rui Ding8Jiahui Liu9Zhao Lv10Yun Lu11Yun Lu12Liying Bao13Guoqiang Tan14Guoqiang Tan15Shi Chen16Feng Wu17Feng Wu18Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, ChinaBeijing Institute of Technology Chongqing Innovation Center, Chongqing, ChinaThe 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 LiNi0.90Co0.06Mn0.04O2 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.https://www.frontiersin.org/article/10.3389/fchem.2020.00573/fullNi-rich materialssurface washingboric acidresidual lithium compoundsstorage performance |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Yuefeng Su Yuefeng Su Gang Chen Gang Chen Lai Chen Lai Chen Linwei Li Cong Li Rui Ding Jiahui Liu Zhao Lv Yun Lu Yun Lu Liying Bao Guoqiang Tan Guoqiang Tan Shi Chen Feng Wu Feng Wu |
| spellingShingle |
Yuefeng Su Yuefeng Su Gang Chen Gang Chen Lai Chen Lai Chen Linwei Li Cong Li Rui Ding Jiahui Liu Zhao Lv Yun Lu Yun Lu Liying Bao Guoqiang Tan Guoqiang Tan Shi Chen Feng Wu Feng Wu Clean the Ni-Rich Cathode Material Surface With Boric Acid to Improve Its Storage Performance Frontiers in Chemistry Ni-rich materials surface washing boric acid residual lithium compounds storage performance |
| author_facet |
Yuefeng Su Yuefeng Su Gang Chen Gang Chen Lai Chen Lai Chen Linwei Li Cong Li Rui Ding Jiahui Liu Zhao Lv Yun Lu Yun Lu Liying Bao Guoqiang Tan Guoqiang Tan Shi Chen Feng Wu Feng Wu |
| author_sort |
Yuefeng Su |
| title |
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_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_sort |
clean the ni-rich cathode material surface with boric acid to improve its storage performance |
| publisher |
Frontiers Media S.A. |
| series |
Frontiers in Chemistry |
| issn |
2296-2646 |
| publishDate |
2020-07-01 |
| 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 LiNi0.90Co0.06Mn0.04O2 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. |
| topic |
Ni-rich materials surface washing boric acid residual lithium compounds storage performance |
| url |
https://www.frontiersin.org/article/10.3389/fchem.2020.00573/full |
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