Cornhusk mesoporous activated carbon electrodes and seawater electrolyte: The sustainable sources for assembling retainable supercapacitor module

C. Justin Raj, Ramu Manikandan, Murugesan Rajesh, Periyasamy Sivakumar, Hyun Jung, S. Jerome Das, Byung Chul Kim

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Renewable and sustainable energy sources are essential for modern society especially for the energy storage device owing to the usage of nonrenewable resources and considering the cost of the raw materials. In this work, we design a supercapacitor utilizing activated carbon from the agricultural waste cornhusk (CHAC) as an electrode material and seawater as the electrolyte. Moreover, the supercapacitor is assembled and test employing different substrates such as stainless steel, nickel foam, carbon cloth and titanium. Among them, the Ti-based electrode exhibits comparable electrochemical performances and high stability in the seawater electrolyte than the stainless steel (SS)-based and other electrodes. The supercapacitor with CHAC deposit on Ti substrate shows considerable specific capacitance value (130 F g−1), better energy density (7.74 W h kg−1) and stability ~98% for 10000 cycles in an optimize electrolyte concentration (seawater). Furthermore, a laboratory-scale portable supercapacitor module demonstrates considerable electrochemical performances and also the retainability of the device can maintain by recharging fresh electrolyte after several charging/discharging cycles.

Original languageEnglish
Article number229518
JournalJournal of Power Sources
Volume490
DOIs
StatePublished - 1 Apr 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Funding

This research was supported by, 1) Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future ( NRF-2015M3D1A1069710 ); and 2) Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2014R1A6A1030419 ), Republic of Korea.

FundersFunder number
Ministry of Science, ICT and FutureNRF-2015M3D1A1069710
Ministry of EducationNRF-2014R1A6A1030419
National Research Foundation of Korea

    Keywords

    • Activated carbon
    • Seawater electrolyte
    • Supercapacitor
    • Supercapacitor module

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