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Co2(OH)3Cl xerogels with 3D interconnected mesoporous structures as a novel high-performance supercapacitor material

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Abstract

Co2(OH)3Cl xerogel interconnected mesoporous structures have been prepared by a facile one pot sol-gel process and heat treated at 200 and 400 °C. All samples are studied for their morphology, structure, and electrochemical stability upon cycling. The specific capacitance of the as-prepared Co2(OH)3Cl from single electrode study is 450 F/g, when the electrodes are cycled in 3 M KOH at a specific current 2 A/g. Interestingly, capacity retention after 500 and 1000 cycles is about 92 and 75 %, respectively. Sample heated at 200 °C exhibits 308 F/g at 2 A/g and that heated at 400 °C shows only 32 F/g at 0.2 A/g. With an increase in preparation temperature, amorphous Co2(OH)3Cl is converted to crystalline Co3O4 phases with lower electrochemical performance. In full cell study, as-prepared Co2(OH)3Cl showed a capacity of about 49 F/g as asymmetric capacitor and 32 F/g as symmetric capacitor at 2 A/g current density. Co2(OH)3Cl being a novel porous material with merits of homogeneous porosity, high surface area, and an interconnected three dimensional (3D) structure exhibits considerably high capacitance. With a significant specific capacity and electrochemical stability, the synthesized material is a novel potential candidate for supercapacitors.

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Acknowledgment

Dr. S Ranganatha acknowledges the financial support from the University Grant Commission (UGC), Government of India, under Dr. D.S. Kothari postdoctoral fellowship program [Ref. No. F.4-2/2006(BSR)/CH/14-15/0133].

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Authors and Affiliations

  1. Department of Inorganic & Physical Chemistry, Indian Institute of Science, C V Raman Avenue, Bengaluru, 560012, India

    S. Ranganatha, Surender Kumar, Tirupathi Rao Penki, Brij Kishore & N. Munichandraiah

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  1. S. Ranganatha
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  2. Surender Kumar
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  3. Tirupathi Rao Penki
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  4. Brij Kishore
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  5. N. Munichandraiah
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Correspondence to S. Ranganatha.

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Ranganatha, S., Kumar, S., Penki, T.R. et al. Co2(OH)3Cl xerogels with 3D interconnected mesoporous structures as a novel high-performance supercapacitor material. J Solid State Electrochem 21, 133–143 (2017). https://doi.org/10.1007/s10008-016-3348-7

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  • DOI: https://doi.org/10.1007/s10008-016-3348-7

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