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Ultra-High Mass-Loading Cathode for Aqueous Zinc-Ion Battery Based on Graphene-Wrapped Aluminum Vanadate Nanobelts

Authors :
Wenyu Zhang
Shuquan Liang
Guozhao Fang
Yongqiang Yang
Jiang Zhou
Source :
Nano-Micro Letters, Vol 11, Iss 1, Pp 1-12 (2019)
Publication Year :
2019
Publisher :
SpringerOpen, 2019.

Abstract

Abstract Rechargeable aqueous zinc-ion batteries (AZIBs) have their unique advantages of cost efficiency, high safety, and environmental friendliness. However, challenges facing the cathode materials include whether they can remain chemically stable in aqueous electrolyte and provide a robust structure for the storage of Zn2+. Here, we report on H11Al2V6O23.2@graphene (HAVO@G) with exceptionally large layer spacing of (001) plane (13.36 Å). The graphene-wrapped structure can keep the structure stable during discharge/charge process, thereby promoting the inhibition of the dissolution of elements in the aqueous electrolyte. While used as cathode for AZIBs, HAVO@G electrode delivers ideal rate performance (reversible capacity of 305.4, 276.6, 230.0, 201.7, 180.6 mAh g−1 at current densities between 1 and 10 A g−1). Remarkably, the electrode exhibits excellent and stable cycling stability even at a high loading mass of ~ 15.7 mg cm−2, with an ideal reversible capacity of 131.7 mAh g−1 after 400 cycles at 2 A g−1.

Details

Language :
English
ISSN :
23116706 and 21505551
Volume :
11
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Nano-Micro Letters
Publication Type :
Academic Journal
Accession number :
edsdoj.609fe61b5c7743b78e45827f6c05a369
Document Type :
article
Full Text :
https://doi.org/10.1007/s40820-019-0300-2