期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 10, 页码 10380-10388出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c02291
关键词
microporous carbon nanosphere; Stober method; CO2 activation; supercapacitor; hierarchical; phenolic resin
资金
- Ministry of Science and Technology, Taiwan [MOST 106-3113-E-239-001]
- Advanced Institute of Manufacturing with High-tech Innovations (AIM-HI) from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan
Microporous carbon spheres (MCSs) fabricated using the extended Stober method have unique features, such as a narrow particle size distribution and a variety of applications. Here, we report the synthesis of nanosized MCSs using a modified version of the extended Stober method at an ambient condition, which is a simple, quick, and scalable process. The activation of nanosized MCSs using CO2 is conducted to increase the surface area of MCSs. The activated microporous carbon nanospheres (AMCNSs) have a specific surface area of 3259 m(2)/g and a mean diameter of about 52 nm. To the best of our knowledge, this is the smallest reported particle size for carbon spheres with a very high specific surface area. In addition, AMCNSs have a hierarchical structure, which is beneficial for mass transport. The AMCNSs are evaluated for application in supercapacitors. The results show that a capacitance of 225 F/g at a current density of 0.5 A/g in a 6 M KOH aqueous electrolyte can be achieved, indicating that AMCNSs have a potential for supercapacitor applications.
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