Electrochemically synthesized large area network of CoxNiyAlz layered triple hydroxides nanosheets: A high performance supercapacitor |
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| Authors: | Vinay Gupta Shubhra Gupta Norio Miura |
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| Affiliation: | 1. Carbon Technology Unit, National Physical Laboratory, New Delhi 110012, India;2. Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga-shi, Fukuoka 816-8580, Japan;3. Japan Science and Technology Agency, Kawaguchi-shi, Saitama 332-0012, Japan |
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| Abstract: | A network of CoxNiyAlz layered triple hydroxides (LTHs) nanosheets was prepared by the potentiostatic deposition process at −1.0 V (vs. Ag/AgCl) onto stainless steel electrodes. X-ray diffraction patterns show that the CoxNiyAlzLTHs belong to the hexagonal system with layered structure. Cyclic voltammetry and charge discharge measurements in the potential range of −0.1 to 0.5 V and 0.0–0.4 V, respectively, vs. Ag/AgCl in 1 M KOH electrolyte indicate that CoxNiyAlzLTHs have excellent supercapacitive characteristics. The maximum specific capacitance of ∼1263 F g−1 was obtained for Co0.59Ni0.21Al0.20LTH. The impedance studies indicated highly conducting nature of the CoxNiyAlzLTHs. |
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| Keywords: | CoxNiyAlz Layered triple hydroxides Potentiostatic deposition Specific capacitance Supercapacitor |
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