A Simple and Green Preparation Method of Nitrogen‐Doped Carbon Nanocages for Supercapacitor Application,ChemNanoMat

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A Simple and Green Preparation Method of Nitrogen‐Doped Carbon Nanocages for Supercapacitor Application
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-01-16 , DOI: 10.1002/cnma.201900629
Liang Jiang ₁ , Shuhan Yang ₂ , Wenna Song ₂ , Jianhua Zhao ₂ , Zhihua Lu ₂ , Qianqian Zhai ₂ , Jing Wang ₂

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The exploration of porous carbon materials with excellent electrochemical capacity is urgently needed for the development of the next generation of energy storage devices. Cage‐like carbon nanomaterials have been extensively studied for their excellent capacitive properties, but the current preparation methods for carbon nanocages are generally costly. A simple and green preparation method for nitrogen‐doped carbon nanocages is proposed in this study. In the synthesis process, the growth of the carbon nanocages is realized by using potassium chloride as a hard template, which can be removed by washing with hot water, avoiding the use of corrosive reagents and realizing the reuse of the template by recrystallization. The carbon materials exhibit unique nanocage morphology with macropores, which can provide fast ion diffusion pathways. Meanwhile, nitrogen doping enhances electrolyte ion interactions with carbon surfaces, leading to improved capacitances and rate capabilities. By the synthetical effect of the above characteristics, the specific capacitance reaches 251 F g⁻¹ at 0.1 A g⁻¹ and 201 F g⁻¹ at 10 A g⁻¹. This work introduces a new method for preparing high‐performance carbon electrode materials.

中文翻译：

一种用于超级电容器的氮掺杂碳纳米笼的简单而绿色的制备方法

下一代储能装置的开发迫切需要探索具有优异电化学容量的多孔碳材料。笼状碳纳米材料因其出色的电容性能而受到了广泛研究，但当前的碳纳米笼制备方法通常成本较高。这项研究提出了一种简单的绿色制备氮掺杂碳纳米笼的方法。在合成过程中，碳纳米笼的生长是通过使用氯化钾作为硬模板来实现的，可以通过用热水洗涤去除碳纳米笼，避免使用腐蚀性试剂，并通过重结晶实现模板的再利用。碳材料显示出具有大孔的独特的纳米笼形态，可提供快速的离子扩散途径。同时，氮掺杂增强了电解质离子与碳表面的相互作用，从而改善了电容和速率能力。通过上述特性的综合作用，比电容达到251 F g^-1在0.1 A克^-1和201 F G ^-1以10 A G ^-1。这项工作介绍了一种制备高性能碳电极材料的新方法。

更新日期：2020-01-16

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