在梯度有孔碳中编排五元素相互作用,用于先进的离子混合电容器
Yangjie Liu1,2, Yao Guo1, Yu Zhang1
1State Key Laboratory of Structural Chemistry, and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
我们开发了一种用于离子混合电容的新型五元素合碳材料. 这种材料提高了能量和功率密度,同时确保了先进的能源存储的长期稳定性.
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 (SIHC) 旨在将电池的高能量密度与超级电容器的高功率密度相结合.
- 在SIHC中,一个关键的挑战是法拉代式阳极和电容式阴极之间的动力和容量不匹配.
- 开发先进的电极材料对于克服这些局限性至关重要.
研究的目的:
- 为了设计一种具有纳米圈架构的新型五元素化梯度多孔碳 (PE-GPC) 材料.
- 研究多种兴奋剂在SIHC中对电荷存储和离子传输的协同作用.
- 提高SIHC的能量密度,功率密度和循环稳定性.
主要方法:
- 使用高的原理合成五个元素合的梯度多孔碳 (PE-GPC) 材料.
- 材料的纳米圈架构和孔隙结构的表征.
- 操作光谱和机器学习潜力,以研究元素相互作用和机制.
- SIHC全电池的制造和电化学测试.
主要成果:
- PE-GPC材料呈现出一种独特的纳米圈架构,具有渐变孔隙性.
- 协同的S,F,N,B和P剂的相互作用增强了伪容量存储和SEI稳定性.
- 全电池SIHC的能量密度为196Wh kg-1,功率密度为10.4kW kg-1,9000个循环后,容量保留率为88.2%.
- 高稳定范式有效地解决了电荷转移不平衡.
结论:
- 开发的PE-GPC材料为SIHC中平衡动力学和容量提供了一个有前途的解决方案.
- 高性兴奋剂策略为设计先进的储能材料提供了一种通用方法.
- 这项工作为下一代多离子存储设备铺平了道路,其性能和寿命得到了改进.
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