在自承载3D石墨烯气凝中高密度Co和N双,以协同增强超级电容性能
Rong Hu1, Jing Yang1, Xi Zhang2
1Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, and School of Physics and Optoelectronic, Xiangtan University, Hunan, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 9, 2026
概括
我们开发了一种新的/联合化石墨烯气凝 (Co-NGA),用于先进的超级电容器. 这种材料通过将多孔结构与增强的离子吸附和氧化还原活性相结合,显著提高了能量储存.
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
- 纳米技术 纳米技术
背景情况:
- 石墨烯气凝 (GA) 是超级电容器的关键材料,因为它的导电性和表面积.
- 提高超级电容器性能需要超越物理离子吸附,包括伪电容.
- (Co) 具有多重价值态和高理论电容,非常适合伪电容.
研究的目的:
- 为了合成一种新的/联合化石墨烯气凝 (Co-NGA) 材料.
- 为了研究多孔结构和Co/N联合兴奋剂对电化学性能的协同作用.
- 评估Co-NGA作为高性能超级电容器的电极材料的潜力.
主要方法:
- 为了合成Co-NGA,采用了一步的热水联合兴奋剂策略.
- 在石墨烯网格中的原子被利用来实现原子级分散和原子的稳定定.
- 电化学性能使用循环电压测量,静电电荷放电和电化学阻抗光谱学进行了评估.
主要成果:
- 合成的5.6%Co-NGA在1A/g时表现出2092F/g的特定电容,远远超过NGA (390F/g) 和GA (239F/g).
- Co/N 联合兴奋剂策略确保了 Co 原子的稳定定,增强了电化学稳定性.
- 一个使用5.6%Co-NGA的不对称超级电容器展示了显著的储能能力.
结论:
- 联合/非联合兴奋剂是一种有效的策略,可以提高基于石墨烯气凝的超级电容器的性能.
- 开发的Co-NGA材料对下一代储能设备有很大的前景.
- 这项工作为设计超级电容器的先进电极材料提供了新的途径.
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