斯宾尔合金矿的溶液加工:脱皮机制,分散稳定性和应用
Ramesh Chandra Sahoo1,2, Priyabrata Sahoo1,2, Manish Kumar Mohanta3
1Energy Materials Laboratory, Centre for Nano and Soft Matter Sciences, Bangalore 562162, India.
Inorganic chemistry
|April 18, 2024
概括
研究人员通过液相脱皮,将无层合金 (NiCo2O4) 脱皮成几层纳米薄膜. 这些-乙烯纳米板显示出高性能超级电容器的前景,在4000个循环后保持98%的电容.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 电化学 电化学 电化学
背景情况:
- 在先进的应用中,对非层材料进行对2D纳米片的剥皮是至关重要的.
- 合金 (NiCo2O4) 是一种具有旋转结构的无层材料,在各种领域显示出潜力.
- 开发生产单层或少层合金的高效方法具有重要意义.
研究的目的:
- 合成和剥离合金 (NiCo2O4) 成为单层或几层合金纳米板.
- 研究脱皮机制并优化各种溶剂中的分散稳定性.
- 为了评估脱皮纳米片作为超级电容器中的活性材料的性能.
主要方法:
- 层层的NiCo2双氧化物的拓化学转化为NiCo2O4.
- 在低沸点溶剂中大量NiCo2O4的液相脱皮.
- 分析超离心法用于分散稳定性分析.
- 密度函数理论 (DFT) 计算用于机制阐明.
主要成果:
- 成功合成了NiCo2O4,并将其剥离成合金纳米板.
- 确定水/异醇辅溶剂,以获得最佳的分散稳定性.
- DFT的计算显示,Co-O债券表面终结需要最小的脱皮能量.
- 制造的超级电容器用合金烯纳米片实现了10.2mFcm-2的电容.
- 证明了强大的超级电容器稳定性,在4000个循环后保留了~98%的电容.
结论:
- 液相脱皮是一种有效的方法,用于从NiCo2O4中生产合金纳米板.
- 优化溶剂系统和了解脱皮机制是2D材料生产的关键.
- 合金乙烯纳米板是高性能固态超级电容器没有添加剂的有希望的电极材料.
更多相关视频
相关概念视频
01:09Colloidal precipitates
574
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
574
00:52Washing, Drying, and Ignition of Precipitates
911
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
911
01:03Precipitation Gravimetry
6.3K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
6.3K