Enhanced Electrochemical Capacitive Properties of Nickel‐Cobalt Oxide Nano‐flakes Materials |
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Authors: | Lingbin Kong Li Deng Junwei Lang Xu Ji Yongchun Luo Long Kang |
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Institution: | 1. State Key Laboratory of Gansu Advanced Non‐ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, Gansu 730050, China;2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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Abstract: | Nickel‐cobalt oxide nano‐flakes materials are successfully synthesized by a facile chemical co‐precipitation method followed by a simple calcination process. The studies show that the as‐prepared nickel‐cobalt oxides with different Ni/Co ratio are composed of NiO and Co3O4 compounds. The Co0.56Ni0.44 oxide material, which exhibits a mesoporous structure with a narrow distribution of pore size from 2 to 7 nm, possesses markedly enhanced charge‐discharge properties at high current density compared with the pure NiO and pure Co3O4. The Co0.56Ni0.44 oxide electrode shows a specific capacitance value of 1227 F/g at 5 mA/cm2, which is nearly three times greater than that of the pure NiO electrode at the same current density. |
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Keywords: | electrochemical capacitors nickel‐cobalt oxide nanostructures electrochemistry composite materials |
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