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- Title
Functional Surface Coating to Enhance the Stability of LiNi 0.6 Mn 0.2 Co 0.2 O 2.
- Authors
Xie, Yingying; Li, Matthew; Li, Jiantao; Huang, Xiaozhou; Cai, Jiyu; Yang, Zhenzhen; Nguyen, Hoai; Shaik sulaiman, Baasit ali; Karami, Niloofar; Chernova, Natalya A.; Upreti, Shailesh; Prevel, Brad; Wang, Feng; Chen, Zonghai
- Abstract
Parasitic reactions are responsible for continuous performance loss during the normal operation and storage of lithium-ion batteries, particularly for those using nickel-rich cathode materials. Among many contributors, residual Li2CO3 on the surface of nickel-rich cathodes plays a detrimental role in promoting parasitic reactions, and hence accelerates the performance loss of those cathode materials. In this work, a wet impregnation process was utilized to convert the detrimental Li2CO3 and LiOH impurities into a beneficial functional surface coating comprising phosphates. Specifically, hydro-phosphates were used as the functional surface modification agents to mitigate the detrimental effect of surface residuals. The best electrochemical performance was achieved by modifying LiNi0.6Mn0.2Co0.2O2 with a diluted dihydro-phosphate solution (pKa = 7.2), while the metal cation had a negligible impact on the electrochemical performance. This work provides a cheap and simple method for enabling the high performance of nickel-rich cathodes.
- Subjects
PHOSPHATE coating; LITHIUM-ion batteries; CATHODES
- Publication
Batteries, 2023, Vol 9, Issue 10, p485
- ISSN
2313-0105
- Publication type
Article
- DOI
10.3390/batteries9100485