Highly mesoporous LaNiO3/NiO composite with high specific surface area as a battery-type electrode |
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| Affiliation: | 1. Center for Applied Chemistry, University of Electronic Science and Technology of China, Chengdu 610054, PR China;2. Materials Research Institute, Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, United States;1. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;2. Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology, Xi’an 710048, China;3. Material Corrosion and Protection Key Laboratory of Sichuan Province, Zigong 643000, China;1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;2. College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;3. Shanghai Institute of Space Power-Sources, Shanghai, 200000, China;1. Interdisciplinary Laboratory of Electrochemistry and Ceramics, LIEC – Chemistry Institute, São Paulo State University – UNESP, Araraquara, SP, Brazil;2. Faculty of Engineering of Guaratinguetá, São Paulo State University – UNESP, Guaratinguetá, SP, Brazil;1. Nanomaterials Laboratory, Department of Physics, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India;2. Electrodics and Electrocatalysis (EEC) Division, CSIR–Central Electrochemical Research Institute (CSIR–CECRI), Karaikudi, 630 003, Tamil Nadu, India;3. Department of Physics, School of Science and Humanities, Karunya University, Karunya Nagar, Coimbatore, 641 114, Tamil Nadu, India;1. Instituto de Catálisis y Petroleoquímica CSIC. C/Marie Curie 2, 28049, Madrid, Spain;2. Instituto de Ciencia de Materiales de Madrid, CSIC. C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;3. Institut Laue-Langevin, BP156X, Grenoble, F-38042, France |
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| Abstract: | This study reports the fabrication and characterization of mesoporous LaNiO3/NiO composite with a very high specific surface area for a battery-type electrode. The mesoporous LaNiO3/NiO composite was synthesized via a sol–gel method by using silica gel as a template, the colloidal silica gel was obtained by the hydrolysis and polymerization of tetraethoxysilane in the presence of La and Ni salts. We investigated the structure and the electrochemical properties of mesoporous LaNiO3/NiO composite in detail. The mesoporous composite sample showed a specific surface area of 372 m2 g−1 with 92.7% mesoporous area and displayed remarkable electrochemical performance as a battery-type electrode material for supercapacitor. The specific capacity values were found to be 237.2 mAh g−1 at a current density of 1 A g−1 and 128.6 mAh g−1 at a high current density of 20 A g−1 in 1 M KOH aqueous electrolyte. More importantly, this mesoporous composite also showed an excellent cycling performance with the retention of 92.6% specific capacitance after 60,000 charging and discharging cycles. |
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| Keywords: | High specific surface area Battery-type electrode Sol-gel method Cycling performance |
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