The Stable 3D Zn Electrode for High-Power Density Zn Metal Batteries

Author(s)
Zhu, Yun Guang; Narayanan, Thaneer Malai; Katayama, Yukihisa; Shao-Horn, Yang
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Abstract
A stable Zn metal electrode can develop rechargeable zinc metal batteries (RZMBs) which have the high theoretical capacity (820 mAh g<jats:sup>−1</jats:sup>), low redox potential, and intrinsic safety. However, the corrosion of Zn metal in aqueous electrolytes and Zn dendrite formation during the plating process lead to poor cycling and thus hinder the development of RZMBs. Here, we employed ionic liquid-based gel polymer (poly(vinylidene fluoride)-co-hexafluoropropylene, PVDF-HFP) and acetylene black (AB) to achieve a stable and flexible three-dimensional (3D) Zn/AB/PVDF-HFP film electrode with ionic and electronic conductive networks and high surface area, showing 26 times higher plating/stripping current than planar Zn plate. By developing a continuous structure between the ionic liquid-based gel polymer membrane and the flexible 3D Zn/AB/PVDF-HFP electrode, the low resistance, high rate capability and long cycle life (&gt; 800 h) was obtained. Our work shows a flexible Zn film electrode and ionic liquid-based gel polymer electrolyte, could pave the path for rechargeable and high-cycle life thin-film RZMBs.</
Date issued
2021-12-01
URI
https://hdl.handle.net/1721.1/141376
Department
Massachusetts Institute of Technology. Research Laboratory of Electronics; Massachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Journal of the Electrochemical Society
Publisher
The Electrochemical Society
Citation
Zhu, Yun Guang, Narayanan, Thaneer Malai, Katayama, Yukihisa and Shao-Horn, Yang. 2021. "The Stable 3D Zn Electrode for High-Power Density Zn Metal Batteries." Journal of the Electrochemical Society, 168 (12).
Version: Final published version
ISSN
0013-4651
1945-7111
Keywords
Materials Chemistry, Electrochemistry, Surfaces, Coatings and Films, Condensed Matter Physics, Renewable Energy, Sustainability and the Environment, Electronic, Optical and Magnetic Materials
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