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Cheng W, Wang X, Huang J, Wang Y, Yin L, Li J, Kong X, Feng Q. Electrochemical study of reduced graphene oxide@Zn2Ti3O8 nanocomposites as a superior anode for Li-ion battery. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wang X, Cheng W, Hu J, Yu H, Kong X, Uemura S, Kusunose T, Feng Q. Topochemical synthesis of Mn 2O 3/TiO 2 and MnTiO 3/TiO 2 nanocomposites as lithium-ion battery anodes with fast Li + migration and giant pseudocapacitance via the mesocrystalline effect. NANOSCALE 2022; 14:13696-13710. [PMID: 36093859 DOI: 10.1039/d2nr03516b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Transition metal compounds are a promising substitute for graphite as lithium-ion battery (LIB) anodes. In this study, mesocrystalline Mn2O3/TiO2 and MnTiO3/TiO2 nanocomposites were synthesized using a layered titanic acid H1.07Ti1.73O4 (HTO) precursor. The β-MnOOH layer is intercalated into the interlayer of HTO by Mn2+-exchange treatment of H2O2-intercalated HTO, which includes ion-exchange of Mn2+ with H+ in the interlayer and oxidation of Mn2+ to the β-MnOOH layer by H2O2 in the interlayer space. Mesocrystalline Mn2O3/TiO2 and MnTiO3/TiO2 nanocomposites with a platelike morphology were obtained by heat treatment of a sandwich layered HTO/β-MnOOH under air and H2/Ar atmospheres, respectively. The electrochemical results suggest that the mesocrystalline Mn2O3/TiO2 and MnTiO3/TiO2 nanocomposites show a synergistic effect for enhanced cycling stability and a mesocrystalline effect for enhanced discharge-charge specific capacity by improving the Li+ mobility and enhancing the pseudocapacitance of the mesocrystalline nanocomposites as LIB anode materials. The discharge-charge specific capacity of the mesocrystalline Mn2O3/TiO2 nanocomposite is twice as high as that of the polycrystalline one caused by the mesocrystalline effect. Furthermore, the synergistic and mesocrystalline effects led to a stable large discharge-charge specific capacity of 710 mA h g-1 for the mesocrystalline Mn2O3/TiO2 nanocomposite. This work proposes a new concept to enhance the performance of anode materials for LIBs using mesocrystalline materials.
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Affiliation(s)
- Xing Wang
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan.
| | - Weijie Cheng
- School of Materials Science and Engineering, Shaanxi University of Science and Technology, Weiyang, Xi'an, Shaanxi, 710021, PR China
| | - Jiaqiao Hu
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan.
| | - Han Yu
- College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, 721013, China
| | - Xingang Kong
- School of Materials Science and Engineering, Shaanxi University of Science and Technology, Weiyang, Xi'an, Shaanxi, 710021, PR China
| | - Shinobi Uemura
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan.
| | - Takafumi Kusunose
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan.
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi, 761-0396, Japan.
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