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Xiao J, Zhai P, Wei Y, Zhang X, Yang W, Cui S, Jin C, Liu W, Wang X, Jiang H, Luo Z, Zhang X, Gong Y. In-Situ Formed Protecting Layer from Organic/Inorganic Concrete for Dendrite-Free Lithium Metal Anodes. Nano Lett 2020; 20:3911-3917. [PMID: 32323995 DOI: 10.1021/acs.nanolett.0c01085] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this work, a separator modified by composite material of graphite fluoride nanosheets and poly(vinylidene difluoride) (GFNs-PVDF) is fabricated to in-situ construct a protective layer on Li metal anodes. The much-improved mechanical properties of this organic/inorganic protecting layer ensure efficient restriction on the growth of Li dendrites. The LiF and graphene nanosheets generated by the reaction of GFNs with lithium metal can not only provide fast transport channels for Li ions but also protect the Li metal anode from continuous corrosion of electrolytes. In addition, GFNs' lithiophilic nature guarantees the uniform Li nucleation site and perfect contact between li metal and the protecting layer without void space, leading to a low interfacial impedance and layer-by-layer lithium deposition. Together with the scalable method and cheap raw materials, this strategy provides new insights toward practical applications of Li metal batteries.
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Affiliation(s)
- Jing Xiao
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Pengbo Zhai
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Yi Wei
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xinyue Zhang
- National Engineering Laboratory for Modern Materials Surface Engineering Technology, The Key Lab of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510651, China
| | - Weiwei Yang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Shiqiang Cui
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Chunqiao Jin
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Wei Liu
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Xingguo Wang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Huaning Jiang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Zilu Luo
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Xiaokun Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yongji Gong
- School of Materials Science and Engineering, Beihang University, Beijing 100191, China
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Xie M, Ai S, Yang J, Yang Y, Chen Y, Jin Y. In-Situ Generation of Oxide Nanowire Arrays from AgCuZn Alloy Sulfide with Enhanced Electrochemical Oxygen-Evolving Performance. ACS Appl Mater Interfaces 2015; 7:17112-21. [PMID: 26181359 DOI: 10.1021/acsami.5b03805] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study, AgCuZn sulfide is fabricated on the surface of AgCuZn alloys by hydrothermal sulfuration. This ternary metal sulfide is equipped with enhanced activity toward oxygen evolution reaction (OER) in an alkaline electrolyte. Through comparison of the alloys with diverse compositions, we find out the best electrochemical property of a particular alloy sulfide forming on a AgCuZn substrate (Ag:Cu:Zn=43:49:8). The alloy sulfide exhibits an onset overpotential (η) of 0.27 V with a Tafel slope of 95±2 mV dec(-1) and a current density of 130 mA cm(-2) at η of 0.57 V. Moreover, the obtained AgCuZn sulfide displays excellent stability, where the current density can increase to 130% of the initial value after a water electrolysis test for 100,000 s (27.7 h). Through investigating the electrode before and after the electrocatalysis, we find a remarkable activated process during which self-supported copper-silver oxide nanowire (CuO-Ag2O NW) arrays in situ form on the surface of the electrode. This work provides a feasible strategy for synthesis of high performance nonprecious metal electrocatalysts for water splitting.
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Affiliation(s)
- Minghao Xie
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
| | - Shiqi Ai
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jian Yang
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yudi Yang
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yihan Chen
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yong Jin
- Department of Materials Science and Engineering, Sichuan University, Chengdu 610064, People's Republic of China
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