多元组件混合过渡金属氧化物电极富含氧气空位,用于超长寿命超级电容器
Zhihui Zhang1,2,3, Shishuai Sun3,4, Zhihui Xu1,2
1School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 9, 2023
概括
这项研究开发了一种用于超级电容器的新型多元组合-铜氧化物电极,显著提高了电导率和稳定性. 这种新材料证明了先进的储能应用的增强储能能力和寿命.
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:
- 过渡金属氧化物对于超级电容器至关重要,但由于导电性和稳定性不佳而面临挑战.
- 改进这些特性是推动能源存储技术发展的关键.
研究的目的:
- 开发一种新的多元组件-铜氧化物电极材料.
- 为了提高超级电容器的电导率和循环稳定性.
主要方法:
- 合成的多组件Ni-Cu氧化物 (NCO-Ar/H2 -10) 使用热水,回火和等离子处理.
- 在金属氧化物中加入铜,创造氧气空缺并改善导电性.
- 使用NCO-Ar/H2-10电极和活性炭 (AC) 制造了一个不对称的超级电容器 (ASC).
主要成果:
- 该NCO-Ar/H2 -10电极显示出高特异容量 (1524Fg-1在3Ag-1),良好的速率性能 (72%) 和出色的周期稳定性 (109%在40,000次循环后).
- 该ASC装置实现了高能量密度48.6Wh kg-1的799.6W kg-1在良好的循环寿命 (1万个循环后117.5%).
- 性能归因于Cu+/Cu2+氧化还原循环,氧空缺增强了离子吸附,并改善了电子/离子传输.
结论:
- Ni-Cu氧化物与氧气空缺的多元组件杂交为高性能超级电容器提供了一个有前途的战略.
- 这种方法显著提高了电化学性能,特别是循环稳定性.
- 这些发现为开发用于储能的先进电极材料提供了新的途径.
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