Abstract
AbstractSupercapacitor has gained significant attention due to its fast charging/discharging speed, high power density and long-term cycling stability in contrast to traditional batteries. In this review, state-of-the-art achievements on supercapacitor electrode based on carbon materials is summarized. In all-carbon composite materials part, various carbon materials including graphene, carbon nanotube, carbon foam and carbon cloth are composited to fabricate larger specific surface area and higher electrical conductivity electrodes. However, obstacles of low power density as well as low cycling life still remain to be addressed. In metal-oxide composites part, carbon nanotube, graphene, carbon fiber fabric and hollow carbon nanofibers combine with MnO2respectively, which significantly address drawbacks of all-carbon material electrodes. Additionally, TiO2is incorporated into graphene electrode to overcome the low mechanical flexibility of graphene. In organic active compounds part, conducting polymers are employed to combinate with carbon materials to fabricate high specific capacitance, long-term thermal stability and outstanding electroconductivity flexible textile supercapacitors. In each part, innovation, fabrication process and performance of the resulting composites are demonstrated. Finally, future directions that could enhance the performance of supercapacitors are discussed.
Highlights
Supercapacitor has gained significant attention due to its fast charging/discharging speed, high power density and long-term cycling stability in contrast to traditional batteries
This review summarizes the latest research on supercapacitor electrodes based on carbon materials
Carbon materials have been widely employed for fabricating SC electrodes owing to their satisfactory corrosion resistance, low density, excellent stability and low cost, and all-carbon composite materials can hold larger specific surface area and higher electrical conductivity
Summary
Abstract: Supercapacitor has gained significant attention due to its fast charging/discharging speed, high power density and long-term cycling stability in contrast to traditional batteries. In organic active compounds part, conducting polymers are employed to combinate with carbon materials to fabricate high specific capacitance, long-term thermal stability and outstanding electroconductivity flexible textile supercapacitors. Carbon materials are utilized as scaffolds, and MnO2 nanostructures are deposited in situ on the surfaces of carbon materials This innovational design has been validated to reduce the electronic/ion transport way, offer larger surface area with extensive active sites for fast Faradic reactions on electrode/electrolyte interfaces, in a way, realize the enhancement of electrochemical performance [43]. To overcome some of the drawbacks of pure PANI [51], PANI is usually employed to combine with carbon materials to fabricate flexible textile supercapacitors with excellent performance [52], including enhancing specific capacitance, increasing thermal stability, improving electroconductivity and so on. Compositions that use at least one carbon basic and one active basic are demonstrated
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