Microwave-assisted hydrothermal synthesis of cobalt phosphide nanostructures for advanced supercapacitor electrodes,CrystEngComm

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Microwave-assisted hydrothermal synthesis of cobalt phosphide nanostructures for advanced supercapacitor electrodes
CrystEngComm ( IF 2.6 ) Pub Date : 2018-03-21 00:00:00 , DOI: 10.1039/c8ce00054a
Feng Liang _{1,

2,

3,

4} , Liang Huang _{1,

2,

3,

4} , Liang Tian _{1,

2,

3,

4} , Junyi Li _{1,

2,

3,

4} , Haijun Zhang _{1,

2,

3,

4} , Shaowei Zhang _{5,

6,

7,

8,

9}

Affiliation

Cobalt phosphide (Co₂P) nanoshuttles were synthesized via simple microwave-assisted hydrothermal treatment of cobalt chloride and yellow phosphorus at 220 °C for 30 min. Their crystalline structure and morphology were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The as-prepared nanoshuttles were ∼20 μm long, and their diameter decreased from about 300 nm in the central part to <30 nm at their terminal tips. A combined oriented attachment and Ostwald ripening mechanism is proposed for the Co₂P nanoshuttle formation, based on the experimental results and density functional theory calculations. The as-prepared Co₂P nanoshuttles exhibited excellent electrochemical properties, e.g., a specific capacitance of 246 F g⁻¹ at a discharge current density of 1 A g⁻¹ along with excellent cycling stability, suggesting their great application potential in high-performance energy storage/conversion devices.

中文翻译：

微波辅助水热合成高级超级电容器电极的磷化钴纳米结构

通过简单的微波辅助氯化钴和黄磷在220°C下30分钟的微波辅助水热处理，合成了磷化钴（Co ₂ P）纳米梭。通过扫描电子显微镜，透射电子显微镜，X射线衍射和X射线光电子能谱表征它们的晶体结构和形态。所制备的纳米梭的长度约为20μm，其直径从中心部分的约300 nm减小到其末端的<30 nm。基于实验结果和密度泛函理论计算，提出了结合定向附着和奥斯特瓦尔德成熟机制的Co ₂ P纳米梭的形成。准备好的Co ₂P纳米梭表现出优异的电化学性能，例如，在1 A g ^-1的放电电流密度下的比电容为246 F g ^-1，同时具有出色的循环稳定性，这表明它们在高性能储能/转换装置中具有巨大的应用潜力。

更新日期：2018-03-21

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