Reasonable Construction of Hollow Carbon Spheres with an Adjustable Shell Surface for Supercapacitors,ACS Applied Materials & Interfaces

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Reasonable Construction of Hollow Carbon Spheres with an Adjustable Shell Surface for Supercapacitors
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-02-25 , DOI: 10.1021/acsami.1c21009
Juan Du ₁ , Aibing Chen ₁ , Xueqing Gao ₁ , Yue Zhang ₁ , Haijun Lv ₁

Affiliation

Hollow carbon spheres (HCS) manifest specific merit in achieving large interior void space, high permeability, wide contactable area, and strong stacking ability with negligible aggregation and have attracted attention due to their high supercapacitor activity. As the key factor affecting supercapacitor performance, the surface chemical properties, shell thickness, roughness, and pore volumes of HCS are the focus of research in this field. Herein, the surface chemical properties and structures of HCS are simultaneously adjusted by a feasible and simple process of in situ activation during assembly of resin and potassium chloride (KCl). This strategy involves KCl participating in resin polymerization and the superior performance of potassium species on activating carbon. The surface N/O content, thickness, defects, and roughness degree of HCS can be controlled by adjusting the dosage of KCl. Electrochemical tests show that optimized HCS has suitable roughness, high surface area, and abundant surface N/O functional groups, which endow it with excellent electrochemical capacitance properties, showing its high potential in supercapacitors.

中文翻译：

超级电容器壳面可调空心碳球的合理构造

空心碳球 (HCS) 在实现大内部空隙空间、高渗透性、宽可接触面积和强堆叠能力和可忽略聚集的强堆叠能力方面表现出特殊的优点，并因其高超级电容器活性而受到关注。作为影响超级电容器性能的关键因素，HCS的表面化学性质、壳层厚度、粗糙度和孔容是该领域研究的重点。在此，在树脂和氯化钾 (KCl) 组装过程中，通过一种可行且简单的原位活化过程同时调整 HCS 的表面化学性质和结构。该策略涉及 KCl 参与树脂聚合和钾物质在活性炭上的优越性能。表面N/O含量、厚度、缺陷、HCS的粗糙度和粗糙度可以通过调节KCl的用量来控制。电化学测试表明，优化后的HCS具有合适的粗糙度、高表面积和丰富的表面N/O官能团，使其具有优异的电化学电容性能，在超级电容器中显示出高潜力。

更新日期：2022-02-25

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