用于高性能超级电容器的金属有机框架和木制碳的表面改性复合材料
Wanning Xiong1, Linlin Zhao1, Jie Ouyang1
1Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China.
Journal of colloid and interface science
|October 3, 2024
概括
研究人员使用和金属有机框架来增强木制碳电极,以获得更优质的能量储存. 这种新的方法显著提高了超级电容器的电容和能量密度,克服了以前的局限性.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 来自木材的碳提供了一个可持续的,等级结构,非常适合用于储能应用中的自载电极.
- 表面积和电导率的限制阻碍了传统的木制碳电极的电荷储存能力.
- 有效的表面改造策略对于释放这些材料在电化学能量储存中的全部潜力至关重要.
研究的目的:
- 开发一种新的表面装饰技术,用于使用金属有机框架 (MOF) 的木制碳电极.
- 提高木制超级电容器的电化学储能性能,特别是电容和能量密度.
- 解决木炭复合材料中低能量密度和低于最佳的循环稳定性的共同挑战.
主要方法:
- 用/基金属有机框架 (Ni/Co-MOF) 装饰木质气管.
- 序列修改包括碳化,氧化激活和酸蚀刻.
- 使用修改的Ni/NiO/CoO-CW-4电极制造和测试固态超级电容器.
主要成果:
- Ni/NiO/CoO-CW-4电极表现出优异的表面积,最佳的孔径分布,高图形化和优异的导电性.
- 在5 mA cm-2.2时达到16.76 F cm-2的异常高面积容量.
- 固态超级电容器的能量密度为0.67 mWh cm−2 (8.38 mWh cm−3),在10,000个周期内保持96.21%的电容.
结论:
- MOF装饰策略显著提高了木制碳电极的电化学性能.
- 开发的超级电容器在能量密度和稳定性方面超过了现有的木制设备.
- 这种方法为从木材中创建高性能,可持续的储能解决方案提供了有希望的途径.
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