Journal
JOURNAL OF POWER SOURCES
Volume 294, Issue -, Pages 150-158Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.06.051
Keywords
Biomass; Binder-free; Flexible; Manganese oxide; Carbon cloth; Supercapacitor
Funding
- National Natural Science Foundation of China [21275136]
- Natural Science Foundation of Jilin Province of China [201215090]
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Successful application of inexpensive energy storage devices lies in the exploitation of fabrication approaches that are based on cost-efficient materials and that can be easily scaled up. Here, inexpensive textile weaved by natural flax fiber is selected as raw material in preparing flexible and binder-free electrode material for supercapacitors. Although carbon fiber cloth obtained from the direct carbonization of flax textile exhibits a low specific capacitance of 0.78 F g(-1), carbon fiber cloth electrode shows a very short relaxation time of 39.1 m s and good stability with almost 100% capacitance retaining after 104 cycles at 5 A g(-1). To extend the application of the resulting carbon cloth in supercapacitor field, a layer of MnO2 nanosheets is deposited on the surface of carbon fiber via in situ redox reaction between carbon and KMnO4. The specific capacitance of MnO2 reaches 683.73 F g(-1) at 2 A g(-1) and still retains 269.04 F g(-1) at 300 A g(-1), indicating the excellent rate capacitance performance of the carbon cloth/MnO2 hybrids. The present study shows that carbon cloth derived from flax textile can provide a low-cost material platform for the facile, cost-efficient and large scale fabrication of binder-free electrode materials for energy storage devices. (C) 2015 Elsevier B.V. All rights reserved.
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