期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 8, 页码 8059-8069出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c01366
关键词
graphene fibers; graphene oxide; conductive; supercapacitor; textiles; yarn type
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIP, Ministry of Science, ICT & Future Planning) [2016M3A7B4910458, 2016M3A7B4910457, 2018M3A7B4070990, 2020R1F1A1076359, 2020R1A2C2103137]
- Traditional Culture Convergence Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2018M3C1B5052283]
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [10080293]
- Vingroup Big Data Institute (Vingroup)
- Vingroup Innovation Foundation (VINIF) [VINIF.2020.DA20]
- National Research Foundation of Korea [2020R1A2C2103137, 2020R1F1A1076359] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study successfully developed ultra-long and millimeter-thick supercapacitors using gel graphene oxide fibers with an ultrahigh aspect ratio, without the need for post-treatment. These supercapacitors have a large electrochemical volumetric capacitance, which enables practical applications.
The fabrication of a high energy density super-capacitor with electrodes bearing ultrahigh aspect ratio active materials is still a big challenge. Here, we successfully developed ultralong and millimeter-thick supercapacitors, which enable practical applications due to the large electrochemical volumetric capacitance overcoming the limits of previous carbon-based materials. The gel graphene oxide fibers (GOFs) with an ultrahigh aspect ratio of over 20,000,000 were completely reduced at room temperature and biscrolled with a conductive Korean traditional paper used as the matrix material for the supercapacitors without any post-treatment. The average cell capacitance value of the yarn-type supercapacitors containing 80 reduced GOFs is maximized at a scan rate of 100 mV/s. The capacitance measured at a scan rate of 1000 mV/s is over 75% of that measured at 100 mV/s.
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