超高功率的基于碳的超级电容器通过秩序-混乱平衡
Dali Mu1,2, He Lin3, Xinglin Jiang1,2
1Institute of Smart City and Intelligent Transportation, Southwest Jiaotong University, Chengdu, 610031, China.
Small (Weinheim an der Bergstrasse, Germany)
|January 27, 2025
概括
研究人员开发了新的超结构管状碳 (SSTC),以克服碳基超级电容器 (SC) 的局限性. 这种材料实现了超高功率密度和稳定的能量密度,为先进的储能解决方案铺平了道路.
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:
- 基于碳的超级电容器 (SC) 提供高功率,但与超高功率密度和能量密度维护扎.
- 这种限制源于碳材料的结构秩序 (导电性) 和混乱 (多孔性) 之间的权衡.
研究的目的:
- 设计一种新的超结构管状碳 (SSTC),平衡结构秩序和混乱,以提高超级电容器的性能.
- 为了应对实现超高功率密度的挑战,同时保持SCs的高能量密度.
主要方法:
- 开发的SSTC使用直接CO2转换和定制的回火处理.
- 使用有机电解质合成的SSTC材料制造的SCs.
- 特性导电性,孔隙结构,功率密度,能量密度保留和循环稳定性.
主要成果:
- 在SSTC中实现了高电导率 (≈19300 S m-1) 和最佳的中孔结构.
- 对于基于SSTC-1000的SC,其最大功率密度为1138.8千瓦千克-1.
- 显示出优异的能量密度保留 (84.6%从0.7到280千瓦的kg-1) 和超高功率的耐用性 (93.7%的容量保留在100,000个周期后在200Ag-1).
结论:
- 新型SSTC材料有效地解决了碳材料中的结构秩序-混乱权衡.
- SSTC使超级电容器能够实现前所未有的超高功率密度,具有显著的能量密度稳定性和耐用性.
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