Nickel/Cobalt Molybdate Hollow Rods Induced by Structure and Defect Engineering as Exceptional Electrode Materials for Hybrid Supercapacitor |
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| Authors: | Dawei Chu Xun Zhao Boxin Xiao Alberto Libanori Yihao Zhou Dr. Lichao Tan Prof. Dr. Huiyuan Ma Haijun Pang Xinming Wang Yanxia Jiang Prof. Dr. Jun Chen |
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| Affiliation: | 1. School of Materials Science and Engineering, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, 150040 Harbin, P. R. China;2. Department of Bioengineering, University of California Los Angeles, 90095 Los Angeles, California, USA |
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| Abstract: | Oxygen defects and hollow structures positively impact pseudocapacitive properties of diffusion/surface-controlled processes, a component of critical importance when building high-performance supercapacitors. Hence, we fabricated hollow nickel/cobalt molybdate rods with O-defects (D−H−NiMoO4@CoMoO4) through a soft-template and partial reduction method, enhancing D−H−NiMoO4@CoMoO4’s electrochemical performance, yielding a specific capacitance of 1329 F g−1, and demonstrating excellent durability with 95.8 % capacity retention after 3000 cycles. D−H−NiMoO4@CoMoO4 was used as the positive electrode to construct an asymmetric supercapacitor, displaying an energy density of up to 34.13 Wh kg−1 and demonstrating good predisposition towards practical applications. This work presents an effective approach to fabricate and use hollow nickel/cobalt molybdate rods with O-defects as pseudocapacitor material for high-performance capacitive energy storage devices. |
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| Keywords: | Hollow structure Oxygen defects Partial reduction Soft template Supercapacitor |
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