Title

Highly durable aqueous Zn ion batteries based on a Zn anode coated by three-dimensional cross-linked and branch-liked bismuth-PVDF layer

Publication Name

Journal of Colloid and Interface Science

Abstract

Rechargeable aqueous Zn ion batteries have been regarded as one of the most promising candidates for next-generation energy storage devices due to their low cost, non-toxicity and high safety. However, the dendrite growth of Zn anode and severe undesired side-reactions largely limited their practical application. Here, we developed a bismuth (Bi)-PVDF layer with unique 3D cross-linked and branch-liked structures as a protective layer on the Zn surface (Zn@Bi-PVDF) to suppress the formation of Zn dendrites and side-reactions, leading to the uniform plating and stripping of Zn during the cycles. Consequently, the symmetric cell with Zn@Bi-PVDF electrodes exhibits long cycling life over 2400 h at a current density of 1 mA cm−2 with a fixed capacity of 1 mAh cm−2. When the Zn@Bi-PVDF anode is paired with a NaV3O8·1.5H2O (NVO) cathode, the fabricated Zn@Bi-PVDF//NVO cell maintains a high reversible capacity of 175.5 mAh g−1 at 1 A g−1 after 500 cycles with an initial capacity retention of 64.1%.

Open Access Status

This publication is not available as open access

Volume

617

First Page

422

Last Page

429

Funding Number

2019ZT08L075

Funding Sponsor

Guangdong Innovative and Entrepreneurial Research Team Program

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.jcis.2022.03.010