电解质
材料科学
电池(电)
电极
化学工程
电化学
储能
纳米技术
功率(物理)
化学
量子力学
物理
工程类
物理化学
作者
Qingxin Li,Ximing Cui,Qinmin Pan
标识
DOI:10.1021/acsami.9b13553
摘要
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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