期刊
MATTER
卷 5, 期 10, 页码 3402-3416出版社
CELL PRESS
DOI: 10.1016/j.matt.2022.07.015
关键词
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资金
- University of Maryland A. James Clark School of Engineering
- AIMLab
- Research Corporation for Science Advancement [27110]
- Facebook Reality Labs Research
- Maryland Nanocenter, its Surface Analysis Center
A chitosan-Zn electrolyte with high mechanical strength, Zn2+ conductivity, and water bonding capability is demonstrated for high-performance Zn-metal batteries. It enables desirable Zn-deposition morphology and shows exceptional cycling stability and rate performance.
Rechargeable aqueous Zn-metal battery is promising for grid energy storage needs, but its application is limited by issues such as Zn dendrite formation. In this work, we demonstrate a Zn-co-ordinated chitosan (chitosan-Zn) electrolyte for high-performance Zn-metal batteries. The chitosan-Zn electrolyte exhibits high mechanical strength, Zn2+ conductivity, and water bonding capability, which enable a desirable Zn-deposition morphology of parallel hexagonal Zn platelets. Using the chitosan-Zn electrolyte, the Zn anode shows exceptional cycling stability and rate performance, with a high Coulombic efficiency of 99.7% and >1,000 cycles at 50 mA cm(-2). The full batteries show excellent high-rate performance (up to 20C, 40 mA cm(-2)) and long-term cycling stability (>400 cycles at 2C). Furthermore, the chitosan-Zn electrolyte is non-flammable and biodegradable, making the proposed Zn-metal battery appealing in terms of safety and sustainability, demonstrating the promise of sustainable biomaterials for green and efficient energy-storage systems.
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