Role of Al(III) in Zn-Based Electrode Synthesis for Supercapacitor

• 作者: Hongfeng Xu Shaomin Zhu Yubin Yang Yue Yu
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 化学
• 关键词: SUPERCAPACITOR Hydrotalcite Zn-Based Electrode Aluminium Ion Doping
• 年，卷（期）: clkxyyyqkyw_2020,（10）
• 页码范围: 659-667
• 页数: 9页
• 分类号: O64

摘要

Supercapacitor is considered as one of the most promising energy storage systems because of its high power density, long life and low production cost. Electrode materials play important roles in the performance of Supercapacitor (SC). In this study, Zn-based hydrotalcite structure materials are prepared by hydrothermal method. The influence of Zn/Al ratio in precursors on electrochemical properties of electrode materials is investigated. The results show that Al(III) promotes the formation of relatively ordered active substances and participates in redox reaction on electrode surface. Specific capacitance of Zn-based electrode reaches 2557 F<span style="white-space:nowrap;">·</span>g^-1 (1.0 A<span style="white-space:nowrap;">·</span>g^-1) at Zn/Al molar ratio of 1:1 in precursors. This method is simple and environmentally friendly. The electrode exhibits excellent electrochemical activity and stability, showing this material application prospect for supercapacitor.