Dual Carbon Potassium-Ion Capacitors: Biomass-Derived Graphene-like Carbon Nanosheet Cathodes
Article
Article Title | Dual Carbon Potassium-Ion Capacitors: Biomass-Derived Graphene-like Carbon Nanosheet Cathodes |
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ERA Journal ID | 40638 |
Article Category | Article |
Authors | Pham, Hong Duc (Author), Mahale, Kiran (Author), Hoang, Thi My Linh (Author), Mundree, Sagadevan G. (Author), Gomez-Romero, Pedro (Author) and Dubal, Deepak P. (Author) |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 12 (43), pp. 48518-48525 |
Number of Pages | 8 |
Year | 2020 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.0c12379 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acsami.0c12379 |
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, hard carbon, graphene-like carbon, potassium-ion capacitor, high energy, high power |
ANZSRC Field of Research 2020 | 400803. Electrical energy generation (incl. renewables, excl. photovoltaics) |
Byline Affiliations | Queensland University of Technology |
School of Civil Engineering and Surveying | |
Catalan Institute of Nanoscience and Nanotechnology, Spain | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5z1y/dual-carbon-potassium-ion-capacitors-biomass-derived-graphene-like-carbon-nanosheet-cathodes
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