DataVXACS Applied Energy MaterialsPaper
journal article·2021-08-23

Ultralong and Millimeter-Thick Graphene Oxide Supercapacitors with High Volumetric Capacitance

Chang Su Yeo, Young-Jung Heo, Min Kyoon Shin, Jong-Hoon Lee, Yong Yeol Park, Seong-Jun Mun, Yahya A. Ismail, Le Hoang Sinh, Soo-Jin Park, Sang Yoon Park

ACS Applied Energy Materials· Volume 4· Issue 8
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Source abstract

Abstract

The fabrication of a high energy density supercapacitor 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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Research context

Energy storageNanomaterials

OpenAlex topics: Supercapacitor Materials and Fabrication · Graphene research and applications · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Advanced Institutes of Convergence Technology, Seoul National University, Suwon 16229, Republic of Korea

Department of Chemistry, Inha University, Incheon 22212, Republic of Korea

Department of Chemistry, University of Calicut, Thenhipalam, Kerala 673635, India

Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang 550000, Vietnam

VN-UK Institute for Research and Executive Education, University of Danang, Danang City 550000, Vietnam

Funding

Korea Evaluation Institute of Industrial Technology · Ministry of Science, ICT and Future Planning · Qu??? ?????i m???i s??ng t???o Vingroup

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