期刊
ADVANCED ENERGY MATERIALS
卷 12, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202102780
关键词
aqueous electrolytes; charge shielding; contact ion pairs; quaternary ammonium cations; zinc metal anodes
类别
资金
- National Natural Science Foundation of China [52061160482]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
- Shenzhen Geim Graphene Center
- Guangdong Province Science and Technology Department [2020A0505100014]
This study introduces a dual-function electrolyte additive to address severe side reactions over zinc metal anodes in aqueous zinc metal batteries, resulting in stable cycling for over 2145 hours. The strategy also enhances the reversibility of energy storage devices based on manganese dioxide and activated carbon.
Aqueous zinc metal batteries are receiving broad attention owing to their promising characteristics of low cost, high safety, and environmental benignity. However, severe side reactions over zinc metal anodes (i.e., dendrite growth and by-product formation) dramatically limit their further development. Herein, the key problems are tackled by introducing a dual-function electrolyte additive (ammonium cation-based salts) to achieve long-term and highly reversible zinc plating/stripping. Specifically, the cation can homogenize the zinc deposition via the charge shielding effect and inhibit by-product formation by participating in the constitution of contact ion pairs. In such a way, the Zn||Zn symmetric cell stably cycles over 2145 h at a current density of 1 mA cm(-2) with the overpotential of merely 25 mV. In addition, the reversibility of energy storage devices based on manganese dioxide and an activated carbon cathode is effectively enhanced. This strategy provides a promising approach for the future development of advanced aqueous metal batteries.
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