氧缺陷介导的NiCo2O4纳米板作为具有提高速率能力的伪电容器的电极
Wen You1, Mengyuan Li2, Qiong Li2
1Editorial Department of Journal of Wuhan Institute of Technology, Wuhan Institute of Technology, Wuhan 430205, China.
Physical chemistry chemical physics : PCCP
|September 7, 2023
概括
研究人员使用减少策略开发了缺氧合金 (NiCo2O4) 纳米薄膜. 这种增强显著提高了电导率,提高了超级电容器的性能和储能应用的速率能力.
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:
- 过渡金属氧化物显示出超级电容器的前景,因为它具有很高的理论电容.
- 较差的电导率和材料利用率限制了这些超级电容器的速率性能.
- 开发提高导电性的策略对于推进超级电容技术至关重要.
研究的目的:
- 为了制造氧缺陷介导的NiCo2O4纳米薄膜 (r-NiCo2O4NSs) 以提高电导率.
- 研究氧缺陷和低价值金属物种对电化学性能的影响.
- 为了证明这一战略在增强储能装置中的电极方面的潜力.
主要方法:
- 合成的NiCo2O4纳米板.
- 使用博化物 (NaBH4) 来引入氧气缺陷的制造后减少.
- 结构性,电气性和电化学性质的表征.
- 在高电流密度下进行超级电容器性能测试.
主要成果:
- 制造的r-NiCo2O4 NSs具有增强的电导率 (1.9 S m-1与原始NiCo2O4 NSs的0.2 S m-1相比).
- 这些材料具有板状形态,氧气缺陷增加和低价值金属物种.
- 达到1812 F g-1的高特异电容,在20 A g-1保持91.5%,证明了优越的速率能力.
结论:
- 氧缺陷介导策略有效地提高了NiCo2O4纳米板的电导率和电化学性能.
- 由此产生的r-NiCo2O4 NSs提供了与碳基电极可比的竞争性速率能力.
- 这种方法可用于其他过渡金属氧化物,用于先进的能量存储和转换应用.
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