High energy density PbO2/activated carbon asymmetric electrochemical capacitor based on lead dioxide electrode with three-dimensional porous titanium substrate |
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| Authors: | Wenli Zhang Haibo Lin Haishen Kong Haiyan Lu Zhe Yang Tingting Liu |
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| Affiliation: | 1. College of Chemistry, Jilin University, Changchun 130012, China;2. Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education, Jilin University, Changchun 130012, China |
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| Abstract: | A PbO2/AC asymmetric electrochemical capacitor (AEC) with energy density as high as 49.4 Wh kg−1, power density of 433.2 W kg−1 and specific capacitance of 135.2 F g−1 was fabricated with PbO2 electrodeposited on three-dimensional porous titanium (3D-Ti/PbO2) and activated carbon. The high electrochemical active surface of 3D-Ti/PbO2 resulted in high specific capacity making it suitable for use as positive electrode in PbO2/AC AEC. The fabricated AEC demonstrated good power performance with an energy density conservation of 30 Wh kg−1 at power density of 2078 W kg−1. The fabricated AEC also showed excellent cycling stability with capacitance retention of 99.2% after 1000 cycles. |
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| Keywords: | Lead dioxide electrode Porous titanium substrate Electrodeposition Asymmetric electrochemical capacitor High energy density |
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