INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Electrochemical Preparation and Performance of Reduced Graphene Oxide/Carbon Paper Air Electrode |
XIAO Shuai, WANG Zhenfei, ZHANG Ping, HE Gang, HONG Jianhe
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Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China |
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Abstract Reduced graphene oxide/carbon paper (rGO/CP) electrode was prepared by a new electrophoretic sedimentation combined with in situ reduction method. The rGO/CP electrode sheets were synthesized by covalent bond recombination in alkaline electrophoresis solution under ultrasonic dispersion, group dissociation and electric field force. SEM, FT-IR and Raman spectra showed that GO was loaded on carbon paper surface and reduced to rGO. The rGO/CP electrode prepared by reduction in the electrophoresis solution with conductivity of 12 mS·cm-1 at 20 V for 10 min was studied in detail. Electrochemical results show that under current density of 0.05 mA·cm-2, the first discharge capacity reached 4.161 mAh, which is 18.5 times of that of pure carbon paper electrode. With the cut-off capacity of 0.1 mAh and potential of 2.0—4.5 V, the rGO/CP electrode leaded to a decrease in charging potential by 0.19 V at the first turn, and presented much better cycle stability.
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Published: 06 November 2020
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Fund:Natural Science Foundation of Hubei Province of China (2017CFB688). |
About author:: Shuai Xiaois a master’s candidate of China University of Geosciences (CUG). Graduated with his bachelor’s degree from Faculty of Materials Science and Enginee-ring,CUG. His main research content is the lithium ion battery cathode material, involves the exploration of LiFePO4 process with high efficiency and the synthesis of lithium air cathode carbon-based materials. Jianhe Hongis an associate professor of China University of Geosciences (CUG). The main research direction is new energy materials (lithium ion battery mate-rials), functional materials and physical chemistry. |
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