通过Cu dopants和高性能超级电容器的氧气空缺来装饰CoO的阴离子和阳离子缺陷
Yamin Feng1, Lingling Sun1, Zhiwen Qi1
1College of physics and telecommunication engineering, Zhoukou Normal University, 466001, Zhoukou, PR China.
Journal of colloid and interface science
|September 1, 2023
概括
工程化氧化物 (CoO) 纳米线与氧空缺和铜剂显著提高了超级电容器的性能. 这种双缺陷策略提高了导电性和储能,为先进的电化学设备铺平了道路.
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:
- 由于其氧化还原活性和高电容性,氧化物 (CoO) 显示出电化学能量储存的希望.
- 然而,CoO的低电导率阻碍了反应动力学,并限制了其在高性能超级电容器中的应用.
研究的目的:
- 通过工程缺陷提高氧化物的电化学性能.
- 提高基于COO的材料的电导率,反应动力学和总体储能能力.
主要方法:
- 采用了多重缺陷策略,将氧气空缺和铜离子剂引入低晶度CoO纳米线中.
- 研究了这些双重缺陷的协同效应,以调节电子结构和电荷分布.
主要成果:
- 设计的Ov-Cu-CoO电极在1A⋅g-1.1时实现了1388.6F⋅g-1的高特异容量.
- 观察到异常速率能力 (81.2%电容保持在20 A⋅g-1) 和循环稳定性 (101.1%在10,000个循环后).
- 一个不对称的超级电容器在800W⋅kg-1.1时显示出高能量密度为44.1W⋅h⋅kg-1.
结论:
- 双缺陷策略有效地提高了CoO的电导率和电化学性能.
- 这种方法为开发高性能超级电容器提供了一种可行的方法,并且可以应用于其他过渡金属氧化物.
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