Wearable superhigh energy density supercapacitors using a hierarchical ternary metal selenide composite of CoNiSe2 microspheres decorated with CoFe2Se4 nanorods

文献情報

出版日 2018-03-19

DOI 10.1039/C8TA01141A

インパクトファクター 12.732

著者

Chandu V. V. Muralee Gopi, Araveeti Eswar Reddy, Hee-Je Kim

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要旨

A rational and multicomponent design of hierarchical CoFe2Se4 (CFS) nanorods adhered to CoNiSe2 (CNS) microsphere composites is prepared for the first time via facile and eco-friendly synthesis methods. The hierarchical CFS–CNS robust architectures enhance the specific surface area and porosity and also increase the availability of electrochemically active sites, which provides ideal pathways for electrolyte diffusion and facilitates electron transportation. As a result, the as-prepared fabric-based CFS–CNS electrode delivers a maximum specific capacity of 183.4 mA h g−1 at a current density of 1 A g−1, with an excellent rate capability of 172.4 mA h g−1 at 8 A g−1 and outstanding cycling stability with 99.2% retention over 3000 cycles in aqueous 3 M KOH electrolyte solution. Moreover, the assembled fabric-based CFS–CNS//CFS–CNS symmetric SC achieves a high energy density of 80.2 W h kg−1 at 1000 W kg−1 and delivers an exceptional cycling stability with 97.02% retention over 3000 cycles as well as exhibiting excellent flexibility to sustain various deformations including bending and twisting. Utilizing the outstanding energy storage performance, the symmetric SC can light up a light-emitting diode for real-time applications.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Wearable superhigh energy density supercapacitors using a hierarchical ternary metal selenide composite of CoNiSe2 microspheres decorated with CoFe2Se4 nanorods

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