材料科学
法拉第效率
阳极
锌
化学工程
金属
电池(电)
阴极
水溶液
电极
冶金
有机化学
化学
功率(物理)
物理
量子力学
工程类
物理化学
作者
Hefei Fan,Min Wang,Yanbin Yin,Qianfeng Liu,Bo Tang,Gongquan Sun,Erdong Wang,Xianfeng Li
标识
DOI:10.1016/j.ensm.2022.04.031
摘要
Aqueous rechargeable zinc metal batteries have sparked enormous attention for large-scale energy storage due to their high capacity, high safety, and low cost. However, limited lifespan and Coulombic efficiency of Zn metal anodes arising from plague deposition and parasitic reactions hinder their further application. Herein, a robust Zn2+ ion-exchanged sulfonated poly (ether ketone) (Zn2+-SPEEK) film is constructed on Zn metal anode. The sulfonate groups (-SO3−) in the film can provide abundant coordination sites with Zn2+, which can not only manipulate uniform Zn2+ flux, but also reduce Zn2+ desolvation active energy. Consequently, the modified zinc (SPEEK-Zn) anodes effectively inhibit dendrite formation and side reactions, and endow fast Zn2+ transfer kinetics. Symmetric cells with SPEEK-Zn electrodes display ultralong life of over 4000 h at 1 mA cm−2 and 1 mAh cm−2 with a low voltage hysteresis of 50 mV. Even under the condition of high mass loading (∼10 mg cm−2) of cathode active material, SPEEK-Zn//VO2 full cells retain a high-capacity retention of 93.1% after continuously running for 140 cycles. This work provides a simple and scalable solution for high performance zinc metal batteries.
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