1
|
Qi MY, Zhang SD, Guo S, Ji PX, Mao JJ, Wu TT, Lu SQ, Zhang X, Chen SG, Su D, Chen GH, Cao AM. Integrated Surface Modulation of Ultrahigh Ni Cathode Materials for Improved Battery Performance. Small Methods 2023:e2300280. [PMID: 37086111 DOI: 10.1002/smtd.202300280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Indexed: 05/03/2023]
Abstract
Ni-rich layered cathodes with ultrahigh nickel content (≥90%), for example LiNi0.9 Co0.1 O2 (NC0.9), are promising for next-generation high-energy Li-ion batteries (LIBs), but face stability issues related to structural degradation and side reactions during the electrochemical process. Here, surface modulation is demonstrated by integrating a Li+ -conductive nanocoating and gradient lattice doping to stabilize the active cathode efficiently for extended cycles. Briefly, a wet-chemistry process is developed to deposit uniform ZrO(OH)2 nanoshells around Ni0.905 Co0.095 (OH)2 (NC0.9-OH) hydroxide precursors, followed by high temperature lithiation to create reinforced products featuring Zr doping in the crust lattice decorated with Li2 ZrO3 nanoparticles on the surface. It is identified that the Zr4+ infiltration reconstructed the surface lattice into favorable characters such as Li+ deficiency and Ni3+ reduction, which are effective to combat side reactions and suppress phase degradation and crack formation. This surface control is able to achieve an optimized balance between surface stabilization and charge transfer, resulting in an extraordinary capacity retention of 96.6% after 100 cycles at 1 C and an excellent rate capability of 148.8 mA h g-1 at 10 C. This study highlights the critical importance of integrated surface modulation for high stability of cathode materials in next-generation LIBs.
Collapse
Affiliation(s)
- Mu-Yao Qi
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Si-Dong Zhang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Sijie Guo
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Peng-Xiang Ji
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
| | - Jian-Jun Mao
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - Ting-Ting Wu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Si-Qi Lu
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Xing Zhang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Shu-Guang Chen
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - Dong Su
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
| | - Guan-Hua Chen
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - An-Min Cao
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| |
Collapse
|