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三重外的Ni@MnO/C空心球体具有可充电离子电容器的增强性能
Tao Xiang1, Zaiting Qu1, Daohong Zhang1,2
1Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, China. daohong.zhang@mail.scuec.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|November 7, 2024
概括
研究人员开发了可充电水性离子电容器 (ZIC) 的新型Ni/MnO@C纳米圈. 这些多结构提高了电化学性能,为先进的储能解决方案提供了更好的容量和长期耐用性.
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:
- 可充电的水性离子电容器 (ZIC) 需要先进的电极材料来提高性能.
- 多结构和电化学激活是增强ZIC阴极的关键策略.
研究的目的:
- 为高性能ZIC合成具有多结构的Ni/MnO@C纳米球.
- 研究电化学激活过程及其对ZIC性能的影响.
- 评估组装ZIC的能量密度,功率密度和循环稳定性.
主要方法:
- 作为模板的Ni3Mn-MOFs的溶热合成.
- 在Ar气氛下通过受控加热制备Ni/MnO@C纳米球.
- 对Ni/MnO@C阴极和组装ZIC的电化学表征.
主要成果:
- Ni/MnO@C 阴极的初始容量为 500 mA h g-1 在 0.3 A g-1.
- 在5200个循环后,在3Ag-1下实现了90.9%的容量保留.
- 组装的ZIC显示能量密度为90.14 W h kg-1,功率密度为2750.17 W kg-1.
- 在6000个循环后,ZIC表现出了很好的长期耐用性,在3A g-1下保持了80.3%的容量.
结论:
- 多的Ni/MnO@C纳米球是高性能ZIC的有效阴极材料.
- 电化学激活和氧气空隙生成显著增强Zn2+吸附和离子扩散.
- 这项研究为开发下一代ZIC阴极提出了一个有前途的战略.
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