Dual Carbon Potassium-Ion Capacitors: Biomass-Derived Graphene-like Carbon Nanosheet Cathodes

Pham, Hong Duc and Mahale, Kiran and Hoang, Thi My Linh and Mundree, Sagadevan G. and Gomez-Romero, Pedro and Dubal, Deepak P. (2020) Dual Carbon Potassium-Ion Capacitors: Biomass-Derived Graphene-like Carbon Nanosheet Cathodes. ACS Applied Materials and Interfaces, 12 (43). pp. 48518-48525. ISSN 1944-8244


Abstract

Potassium-ion storage devices are attracting tremendous attention for wide-ranging applications on account of their low cost, fast charge transport in electrolytes, and large working voltage. However, developing cost-effective, high-energy electrodes with excellent structural stability to ensure long-term cycling performance is a major challenge. In this contribution, we have derived two different forms of carbon materials from almond shells using different chemical treatments. For instance, hard carbon (HC) and graphene-like activated carbon (AC) nanosheets are developed by employing simple carbonization and chemical activation routes, respectively. The resultant hard carbon (AS-HC) and activated carbon (AS-AC) exhibit outstanding electrochemical performance as negative and positive electrodes in a potassium-ion battery (KIB), respectively, through their tailor-made surface properties. These promising benefits pave a way to construct a biomass-derived carbon potassium-ion capacitor (KIC) by employing AS-HC as the negative electrode and AS-AC as the positive electrode in a K-based electrolyte. The as-fabricated KIC delivers a reasonable specific energy of 105 Wh/kg and excellent cycling life with negligible capacitance fading over 10 000 cycles. This “waste-to-wealth” approach can promote the development of sustainable KICs at low cost and inspire their use for fast-rate K-based energy storage applications.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Date Deposited: 22 Oct 2020 05:21
Last Modified: 27 Apr 2021 00:12
Uncontrolled Keywords: biomass waste, hard carbon, graphene-like carbon, potassium-ion capacitor, high energy, high power
Fields of Research (2008): 09 Engineering > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Socio-Economic Objectives (2008): B Economic Development > 85 Energy > 8506 Energy Storage, Distribution and Supply > 850699 Energy Storage, Distribution and Supply not elsewhere classified
B Economic Development > 85 Energy > 8506 Energy Storage, Distribution and Supply > 850602 Energy Storage (excl. Hydrogen)
Identification Number or DOI: https://doi.org/10.1021/acsami.0c12379
URI: http://eprints.usq.edu.au/id/eprint/39959

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