探索氧化还原活性电解质,以提高碳基超级电容器的能量密度
Yang Luo1, Shanshun Wang1, Yamin Xu1
1School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou 310018 China.
Journal of colloid and interface science
|January 16, 2025
概括
研究人员通过向硫酸电解质添加三氨基enzoquinone (TACBQ) 来提高超级电容器的能量密度. 这种氧化还原活性分子显著提高了电容和能量储存,为先进的能源设备提供了有前途的途径.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 超级电容器 (SC) 对于更广泛的应用,需要更高的能量密度.
- 水性电解质提供安全性和成本优势,但通常具有有限的能量密度.
- 反氧活性分子可以通过参与法拉代反应来提高电化学性能.
研究的目的:
- 为了提高水性超级电容器的能量密度.
- 研究氧化还原活性分子作为电解质添加剂的有效性.
- 为SC应用合成和表征三氨基二基 (TACBQ).
主要方法:
- 复合分析以确定合适的氧化还原活性分子.
- 使用FT-IR,NMR和XPS等技术合成和对三氨基enzoquinone (TACBQ) 的结构特征.
- 超级电容器的电化学测试,在1M H2SO4 电解质中使用不同TACBQ度的超级电容器,使用三电极和两电极设置.
主要成果:
- TACBQ已成功合成和表征.
- 在1M H2SO4中2 mg mL-1的最佳TACBQ度显著提高了SC性能.
- 特定电容从141 Fg-1增加到358 Fg-1 (三电极),27 Fg-1增加到35 Fg-1 (两电极).
- 电压窗口扩展到1.6V,能量密度提高到12.43Wh kg-1,在10,000个循环后保持了84%的电容.
结论:
- 三氨基enzoquinone (TACBQ) 是水性超级电容器的有效氧化还原添加剂.
- 将TACBQ添加到H2SO4电解质中,可以大大提高能量密度和电容.
- 这种方法为开发高性能超级电容器提供了一个可行的策略.
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