MnO anchored reduced graphene oxide nanocomposite for high energy applications of Li-ion batteries: The insight of charge-discharge process |
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| Affiliation: | 1. Department of Research, Nagoya Industrial Science Research Institute, 2F Noah Yotsuya Bld., 1-13, Yotsuyatori, Chikusa-ku, Nagoya 464-0819, Japan;2. Faculty of Science and Technology, Meijo University, 1-501, Shiogamaguchi, Tempaku-ku, Nagoya 468-8052, Japan;3. Faculty of Science and Engineering, Iwate University, 4-3-5, Ueda, Morioka 020-8551, Japan;4. Quantum Science and Engineering Center, Graduate School of Engineering, Kyoto University, Gokasho, Uji 611-0011, Japan;1. Satyendra Nath Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata-700106, India;2. School of Computer Science and Software Engineering, University of Western Australia, Perth, WA 6009, Australia;1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, and Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China;2. Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan 030024, China;1. School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China;2. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore |
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| Abstract: | In the present work, a new class of anode material for high energy applications of Li-ion battery is prepared by easy and large-scale producible process. Herein, the nanocomposite of MnO and reduced graphene oxide (rGO) is prepared by anchoring MnO nanoparticles into 3D matrix of rGO hydrogel followed by annealing process. The composite which has homogeneous distribution of MnO particles on conducting rGO layers demonstrated superior electrochemical performance such as high reversible capacity, stable cycle life and better rate capability. It has shown initial discharge capacity of 2358 mAh g−1 and retained 570 mAh g−1 after 100 cycles as compared to pristine MnO which shown initial discharge capacity of 820 mAh g−1 and retained only 45 mAh g−1 after 100 cycles. The retained capacity of new MnO/rGO anode is much higher than the theoretical capacity of conventional graphite anode. Moreover, the MnO/rGO nanocomposite shows six times higher Li+ ion diffusion of 4.18 × 10−12 cm2 s−1 as compared to 6.84 × 10−13 cm2 s−1 of MnO. In addition, the study provides insight of charge-discharge process, which conducted in initial, discharge and charge states of pristine MnO and MnO/rGO composite using ex-situ X-ray diffraction and X-ray photon spectroscopy techniques. |
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| Keywords: | Li-ion battery MnO Graphene oxide Electrochemical performance Hydrothermal synthesis |
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