作为超级电容应用的活性材料复合材料的氧化物和氧化降解石墨烯氧化物作为活性材料复合物
Navid Noor1, Thomas Baker1, Hyejin Lee1,2
1Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada.
ACS omega
|March 11, 2024
概括
研究人员开发了一种用添加剂减少的氧化石墨烯和9,10-phenanthrenequinone复合物用于超级电容器. 这种材料通过将电双层电容与来自氧化还原活性分子的伪电容相结合,显著提高了能量密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于碳的超级电容因依赖电双层电容 (EDLC) 而受到低能量密度的限制.
- 结合氧化还原活性有机分子来实现伪电容,为提高电极材料中的能量密度提供了一个可行的策略.
研究的目的:
- 为超级电容器开发一种新的复合电极材料,以提高能量密度.
- 为了研究配合的减少石墨烯氧化物 (N-HtrGO) 和9,10-phenanthrenequinone (PQ) 的协同效应,以提高电化学性能.
主要方法:
- 使用一种简单的一步物理吸附方法来合成多孔的N-HtrGO/PQ复合物.
- 电化学性能通过循环电压测量和充/放电循环在1M H2SO4.4中进行评估.
- 福里埃变换红外光谱法 (FTIR) 用于分析复合体内的相互作用.
主要成果:
- 该N-HtrGO/30PQ复合物在1M H2SO4中达到605 Fg-1的高电容,显著超过纯N-HtrGO (257 Fg-1).
- 复合材料在20,000个充/放电周期后显示出94.9%的优异容量保留.
- 确定了PQ和N-HtrGO之间强大的π-π相互作用是增强电子转移和结构稳定性的关键.
结论:
- 开发的N-HtrGO/PQ复合物是高性能超级电容器的有希望的电极材料.
- 通过π-π相互作用促进的EDLC和伪电容的组合,导致更高的能量密度和稳定性.
- 这项工作为通过分子设计和复合材料工程设计先进的储能材料提供了一条途径.
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