离子混合电容器可控制结构的多孔和石墨碳纳米板
Xiaohua Zhang1, Chao Jiang1, Jixin Zhao1
1College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Journal of colloid and interface science
|March 9, 2024
概括
有孔的石墨碳纳米板被合成来改进离子混合电容器 (ZIHC). 这种优化的结构增强了离子和电子的运输,导致了优越的能量储存和长期稳定性.
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:
- 离子混合电容器 (ZIHC) 面临由于存储容量和碳阴极和阳极之间的反应动力学失衡的局限性.
- 优化碳材料结构对于增强Zn2+储存和ZIHCS中的离子电子动力学至关重要.
研究的目的:
- 为高性能ZIHCS开发多孔石墨碳纳米板 (PGCN).
- 研究孔隙结构,石墨化和兴奋剂对电化学性质的影响.
主要方法:
- 合成PGCN使用K3[Fe(C2O4) 3-和尿素辅助泡策略与聚烯,随后是激活和石墨化.
- 描述了合成的PGCN的多孔结构,石墨化程度和兴奋剂含量.
主要成果:
- 对于高效的质量转移而言,PGCN的孔径 (0.80-1.94 nm) 非常匹配,对于加速的电子转移而言,它具有很高的石墨化度.
- 高兴奋剂 (7.2%) 提供了丰富的Zn2+储存场所,增加了容量.
- 基于PGCN的ZIHC在0.5Ag-1时实现了181mAhg-1的特定容量,能量密度为145Whkg-1,并且在没有容量衰减的情况下实现了超过10,000个周期.
结论:
- 简单的合成策略使PGCN具有增强的存储能力和快速反应动力学.
- PGCN是高性能,灵活的固态ZIHCS的一个有前途的材料.
- 优化的多孔石墨碳结构是推进ZIHC技术的关键.
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