Study on Capacitance of Zn-Based Electrode in Redox Electrolyte System

• 作者: Hongfeng Xu Shaomin Zhu Xinmei Fan Yubin Yang
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 化学
• 关键词: HYDROXIDE Zinc CARBONATE SUPERCAPACITOR [Fe(CN)6]3? Redox ELECTROLYTE
• 年，卷（期）: 2020,（1）
• 页码范围: 35-43
• 页数: 9页
• 分类号: O64

摘要

Electrode material is one of the most important factors affecting the performance of supercapacitors, and electrolyte solution is another. In this work, electrochemical properties of hydroxide zinc carbonate composite electrode (HZC) in KOH + K3[Fe(CN)6] electrolyte were studied. It was proved that [Fe(CN)6]3−in electrolyte participated in electrochemical reactions and promoted electron transfer. The specific capacitance of HZC electrode was as high as 920.5 F·g−1 at 1.0 A·g−1 in 1 mol·L−1 KOH and 0.04 mol·L−1 K3[Fe(CN)6] electrolyte, which is 172.9% higher than that in KOH. The combination of HZC electrode and low alkalinity aqueous electrolyte provided the supercapacitor system with good capacitance performance, safety, and environmentally friendly.