阴极
阳极
电解质
材料科学
电化学
水溶液
电池(电)
三氟甲磺酸
锌
储能
化学工程
混合材料
无机化学
化学
纳米技术
电极
冶金
催化作用
物理化学
有机化学
量子力学
物理
工程类
功率(物理)
作者
Gang Ni,Hao Zhao,Guo Yin Zou,Fu‐Hu Cao,Ling Qin,Cheng Zhou
标识
DOI:10.1002/celc.202101351
摘要
Abstract Abstract : Aqueous rechargeable zinc‐based batteries with the advantages of sustainability, safety, and low cost, are suitable for large‐scale electrochemical energy storage applications. In this work, aqueous zinc‐based batteries with low defect Berlin green (FeHCF) cathode, a hybrid zinc triflate and potassium triflate electrolyte, and zinc anodes are developed. In the hybrid electrolyte, the K + ions with the weak solvation effect and small electrostatic interaction are the dominant intercalation species in the FeHCF, resulting in the fast charge transfer process and rapid diffusion kinetics. The Zn 2+ ions stay at the surface rather than penetrate into the bulk phase. Thus, the hybrid batteries deliver a high specific capacity of 169.2 mAh g −1 at 100 mA g −1 , excellent rate performance with 45.7 mAh g −1 at 6 A g −1 , and good long‐term cyclability with a capacity retention of 57 % over 1000 cycles at 1 A g −1 . The results suggest using aqueous K/Zn hybrid electrolytes can improve the electrochemical performance of FeHCF.
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