作为双功能材料的NiFe协调聚合物衍生层状双氧化物:Ni:Fe比率对电化学性能的影响
Trivender Kumar1, Bandhana Devi2, Aditi Halder1
1School of Chemical Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh, 175075, India.
ChemPlusChem
|July 1, 2023
概括
这项研究开发了用于电化学设备的金属有机框架 (MOF) 的NiFe层双氧化物 (LDH). 优化的NiFe-LDHs显示出有希望的氧气演化反应活性和高性能超级电容器能力.
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
- 纳米技术 纳米技术
背景情况:
- 对于电解剂和超级电容器等电化学设备而言,高效和成本效益的材料至关重要.
- 金属有机框架 (MOFs) /协调聚合物 (CPs) 可以转化为有层的双氧化物 (LDHs),具有可取的特性,如多孔性,高表面积和可调节的电子结构.
研究的目的:
- 通过一种简单的方法,通过不同的Ni/Fe比率合成NiFe-LDHs.
- 评估这些NiFe-LDHs的电化学性能,用于氧化演化反应 (OER) 和超级电容器应用.
主要方法:
- 易于在室温下性水解NiFe-CPs前体以制备NiFe-LDHs.
- 电化学表征包括OER活动和超级电容器性能测试.
- 一个固态不对称超级电容器装置的制造和测试.
主要成果:
- 具有高Fe含量的NiFe-LDH (Ni1.2Fe1-LDH) 具有很好的OER活性,具有较低的Tafel斜率 (65 mV dec-1).
- 含有高Ni的NiFe-LDH (Ni11.7Fe1-LDH) 显示出高超级电容性能 (702F g-1在0.25A g-1下).
- 制造的Ni11.7Fe1-LDH/AC装置在1A g-1下显示了18F g-1的特定电容,并在7000个循环后保持了88%的电容.
结论:
- /铁比率显著影响-LDHs的电化学性能.
- 来自MOF的NiFe-LDH是OER电催化剂和高性能超级电容器的有希望的候选者.
- 这项工作为开发用于增强电化学应用的基于NiFe-LDH的先进电催化剂提供了洞察力.
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