期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 42, 页码 38762-38770出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b13553
关键词
Zn-ion battery; self-healable hydrogel electrolyte; dendrite suppression; reliability; robustness
资金
- National Natural Science Foundation of China [51473041]
Zinc-ion batteries are promising power sources, but their practical application is impeded by the Zn dendrite growth and side reactions at the electrode/electrolyte interface. Here, we report that such issues can be effectively addressed by a self-healable hydrogel electrolyte. The electrolyte is comprised of carboxyl-modified poly(vinyl alcohol) cross-linked by COO-Fe bonding in the presence of Zn(NO3)(2) and MnSO4. A quasi-solid-state Zn-MnO2 battery using the electrolyte delivers a specific capacity up to 177 mAh g(-1) after 1000 cycles with a retention rate of 83%, which is much better than its equivalent using an aqueous electrolyte. The improvement is attributed to efficient suppression of the dendrite growth and side reactions at the electrode/electrolyte by the hydrogel electrolyte. More importantly, the battery autonomously recovery its energy-storage functions even after multiple physical damages, showing excellent robustness and reliability. The present investigation provides an effective strategy to address the energy-storage performance and reliability of a light-metal battery system.
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