Facile synthesis of NiMn2O4 nanosheet arrays grown on nickel foam as novel electrode materials for high-performance supercapacitors期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Facile synthesis of NiMn2O4 nanosheet arrays grown on nickel foam as novel electrode materials for high-performance supercapacitors

Affiliation:	1. Unité de physique des dispositifs a semi-conducteurs, Faculté des sciences de Tunis, Tunis El Manar University, 2092 Tunis, Tunisia;2. Faculté des Sciences de Bizerte Laboratoire de Physique des Matériaux Département de Physique, Zarzouna, 7021 Bizerte, Tunisia;3. Laboratoire de photovoltaïque, Centre de Recherches et des Technologies de l’Énergie, Technopole de Borj-Cédria BP 95, 2050 Hammam-Lif, Tunisia;4. Physics Department, Faculty of Arts and Sciences, Marmara University, Göztepe, 34722 Istanbul, Turkey;5. Phothermal laboratory IPEIN, Mrezka, BP 62, 8000 Nabeul, Tunisia;1. Unité de Physique des Dispositifs à Semi-conducteurs, Faculté des Sciences de Tunis, Tunis El Manar University, 2092, Tunis, Tunisia;2. Faculté des Sciences de Bizerte, Université de Carthage, Tunisia;3. Unité de Recherche de Physique des Semiconducteurs et Capteurs, IPEST, Université de Carthage, BP 51, La Marsa, 2070, Tunis, Tunisia;1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. Device Mechanism Research Institute, Beijing BOE sensor Technology Co., Ltd., Beijing 100176, China;3. School of Energy and Power Engineering, Beihang University, Beijing 100191, China;4. School of Basic Education, Beijing Polytechnic College, Beijing 100142, China;1. Department of Physics, Selvamm Arts and Science College (Autonomous), Namakkal-03,Tamilnadu, India;2. Department of Electronic Engineering, Yeungnam University, Gyeongsan 38541, South Korea;3. Department of Physics, Periyar University, Salem 636 011, Tamil Nadu, India;4. Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;5. Department of Chemistry and University Centre for Research & Development, Chandigarh University, Mohali 140413, Punjab, India;6. Laboratory of Thermal Processes, Center for Energy Research and Technology, Borj-Cedria, BP: 95, Tunisia;7. Department of Physics, Arignar Anna Government Arts College, Namakkal-02, Tamilnadu, India;1. Centre of Nanotechnology, IIT Roorkee, Roorkee-247667, India;2. Department of Physics, IIT Roorkee, Roorkee-247667, India

Abstract:	Nanostructured spinel NiMn₂O₄ arrays have been fabricated by a facile hydrothermal approach and further investigated as binder-free electrode for high-performance supercapacitors. Compared with Mn₃O₄, NiMn₂O₄ exhibited higher specific capacitances (662.5 F g^?1 and 370.5 F g^?1 in different electrolytes at the current density of 1 A g^?1) and excellent cycling stability (~96% capacitance retention after 1000 cycles) in a three-electrode system. Such a novel microstructure grown directly on the conductive substrate provided sufficient active sites for redox reaction resulting in their enhanced electrochemical behaviors. Their improved performances suggested that ultrathin sheet-like NiMn₂O₄ arrays on Ni foam substrate were a promising electrode material for supercapacitors.

Keywords:	Spinel Nanosheet arrays Supercapacitors
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