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https://hdl.handle.net/2440/131586
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Type: | Journal article |
Title: | Dual carbon potassium-ion capacitors: biomass-derived graphene-like carbon nanosheet cathodes |
Author: | Pham, H.D. Mahale, K. Hoang, T.M.L. Mundree, S.G. Gomez-Romero, P. Dubal, D.P. |
Citation: | ACS Applied Materials and Interfaces, 2020; 12(43):48518-48525 |
Publisher: | ACS Publications |
Issue Date: | 2020 |
ISSN: | 1944-8244 1944-8252 |
Statement of Responsibility: | Hong Duc Pham, Kiran Mahale, Thi My Linh Hoang, Sagadevan G. Mundree, Pedro Gomez-Romero and Deepak P. Dubal |
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. |
Keywords: | biomass waste graphene-like carbon hard carbon high energy high power potassium-ion capacitor |
Rights: | © 2020 American Chemical Society |
DOI: | 10.1021/acsami.0c12379 |
Grant ID: | http://purl.org/au-research/grants/arc/FT180100058 |
Published version: | http://dx.doi.org/10.1021/acsami.0c12379 |
Appears in Collections: | ARC Research Hub for Graphene Enabled Industry Transformation publications Aurora harvest 8 Chemical Engineering publications |
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