Effect of carbon black addition on thermal stability and capacitive performances of supercapacitors

In this study, we propose a simple way to improve thermal stability of solid-state supercapacitors (SCs) by adding carbon black (CB) into reduced graphene oxide (rGO) electrodes. The CB used as a heat-resistant additive contributes to stable operation of the rGO-CB SC even after 1000 charge/discharg...

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Bibliographic Details
Published in:Scientific reports 2018-08, Vol.8 (1), p.11989-7, Article 11989
Main Authors: Yang, Kyungwhan, Cho, Kyoungah, Kim, Sangsig
Format: Article
Language:English
Subjects:
140/146
639/301/357/918/1055
639/4077/4079/4105
Black carbon
Capacitance
Carbon black
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
Thermal stability
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Summary:In this study, we propose a simple way to improve thermal stability of solid-state supercapacitors (SCs) by adding carbon black (CB) into reduced graphene oxide (rGO) electrodes. The CB used as a heat-resistant additive contributes to stable operation of the rGO-CB SC even after 1000 charge/discharge cycles at 90 °C. In the case of the rGO SC without CB, it fails after the 166th cycles at 90 °C. Compared with the rGO SC, the rGO-CB SC exhibits the decrease in internal resistance from 42 to 18 Ω and the increase in specific capacitance from 115 to 160 F/g. Moreover, the rGO-CB SC shows a smaller variation in specific capacitance (12%) than that of rGO SC (30%) as the temperature increases from 30 to 90 °C. The observation reveals that the addition of CB being a heat-resistant additive helps improve performance of thermal stable SCs.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-30507-5