Zhang Dawei, Shen Shaodian, Xiao Xiuzhen, Mao Dongsen, Yan Baoman
Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology Shanghai 201418 China
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology Shanghai 200237 China.
RSC Adv. 2020 Jul 14;10(44):26546-26552. doi: 10.1039/d0ra02935a. eCollection 2020 Jul 9.
Nitrogen-doped hollow carbon spheres (NHCSs) are well prepared by using CuO microspheres as a hard template and 3-aminophenol formaldehyde resin polymer as carbon and nitrogen precursors. The thickness of the carbon shell can be easily controlled in the range of 15-84 nm by simply adjusting the weight ratios of the precursors to CuO microspheres, and the CuO templates can also be further reused. Physicochemical characterization demonstrates that the obtained NHCSs possess a well-developed hollow spherical structure, thin carbon shell and high nitrogen doping content. Due to these characteristics, when further utilized as electrodes for supercapacitors, the NHCSs with the carbon shell thickness of 15 nm show a high capacitance of 263.6 F g at 0.5 A g, an outstanding rate performance of 122 F g at 20 A g and an excellent long-term cycling stability with only 9.8% loss after 1000 cycles at 5 A g in 6 M KOH aqueous electrolyte. This finding may push forward the development of carbon materials, exhibiting huge potential for electrochemical energy storage applications.
以氧化铜微球为硬模板，3-氨基苯酚甲醛树脂聚合物为碳源和氮源前驱体，成功制备了氮掺杂空心碳球（NHCSs）。通过简单调节前驱体与氧化铜微球的重量比，碳壳厚度可轻松控制在15-84nm范围内，氧化铜模板还可进一步重复使用。物理化学表征表明，所得的NHCSs具有发达的空心球形结构、薄碳壳和高氮掺杂含量。由于这些特性，当进一步用作超级电容器电极时，碳壳厚度为15nm的NHCSs在0.5A g下表现出263.6F g的高电容，在20A g下具有122F g的出色倍率性能，并且在6M KOH水溶液电解质中于5A g下循环1000次后仅损失9.8%，具有优异的长期循环稳定性。这一发现可能会推动碳材料的发展，在电化学储能应用中展现出巨大潜力。
