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Yuan GQ, Wei X, Su YC, Zhou TY, Hu JL, An Y, Zhou SL, Zhao WQ, Xia J, Liu YY. Enhancing Zn 2+ Storage Performance by Constructing the Interfaces Between VO 2 and Co-N-C Layers. Small 2023:e2308851. [PMID: 38112252 DOI: 10.1002/smll.202308851] [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: 10/04/2023] [Revised: 11/27/2023] [Indexed: 12/21/2023]
Abstract
Vanadium oxides have aroused attention as cathode materials in aqueous zinc-ion batteries (AZIBs) due to their low cost and high safety. However, low ion diffusion and vanadium dissolution often lead to capacity decay and deteriorating stability during cycling. Herein, vanadium dioxides (VO2 ) nanobelts are coated with a single-atom cobalt dispersed N-doped carbon (Co-N-C) layer via a facile calcination strategy to form Co-N-C layer coated VO2 nanobelts (VO2 @Co-N-C NBs) for cathodes in AZIBs. Various in-/ex situ characterizations demonstrate the interfaces between VO2 layers and Co-N-C layers can protect the VO2 NBs from collapsing, increase ion diffusion, and enhance the Zn2+ storage performance. Additional density functional theory (DFT) simulations demonstrate that Co─O─V bonds between VO2 and Co-N-C layers can enhance interfacial Zn2+ storage. Moreover, the VO2 @Co-N-C NBs provided an ultrahigh capacity (418.7 mAh g-1 at 1 A g-1 ), outstanding long-term stability (over 8000 cycles at 20 A g-1 ), and superior rate performance.
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Affiliation(s)
- Guo-Qiang Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China
| | - Xing Wei
- School of Electrical Engineering, Engineering Technology Research Center of Optoelectronic Technology Appliance, Tongling University, Tongling, Anhui, 244061, P. R. China
| | - Yi-Chun Su
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China
| | - Tian-Yu Zhou
- School of Electrical Engineering, Engineering Technology Research Center of Optoelectronic Technology Appliance, Tongling University, Tongling, Anhui, 244061, P. R. China
| | - Jin-Liang Hu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China
| | - Yang An
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China
| | - Song-Lin Zhou
- School of Electrical Engineering, Engineering Technology Research Center of Optoelectronic Technology Appliance, Tongling University, Tongling, Anhui, 244061, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei, Anhui, 230051, P. R. China
| | - Wen-Qiang Zhao
- School of Electrical Engineering, Engineering Technology Research Center of Optoelectronic Technology Appliance, Tongling University, Tongling, Anhui, 244061, P. R. China
| | - Jun Xia
- Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Yang-Yi Liu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China
- School of Electrical Engineering, Engineering Technology Research Center of Optoelectronic Technology Appliance, Tongling University, Tongling, Anhui, 244061, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei, Anhui, 230051, P. R. China
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