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Water-in-oil microemulsion method preparation and capacitance performance study of Li4Mn5O12

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Abstract

Spinel Li4Mn5O12 nanoparticles are successfully prepared by water-in-oil microemulsion method and characterized by X-ray diffraction and scanning electron microscopy. The Li4Mn5O12 nanoparticles have sphere-like morphology with particle size less than 50 nm. The Li4Mn5O12 and activated carbon (AC) were used as electrodes of Li4Mn5O12/AC supercapacitor, respectively. The electrochemical capacitance performance of the supercapacitor was investigated by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The results showed that the single electrode was able to deliver specific capacitance 252 F g−1 within potential range 0–1.4 V at a scan rate of 5 mV s−1 in 1 mol L−1 Li2SO4 solution, and it also showed high coulombic efficiency close to 100%. This material exhibited a good cycling performance.

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Acknowledgment

This work was supported by the National Natural Science Foundation of China (no. 20701029). The authors gratefully thank the help of Xiaoyang Ji and Xinwan Zhang, Analytical and Testing Center at Sichuan University, for the XRD test and SEM morphology.

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Authors and Affiliations

  1. College of Chemistry, Sichuan University, Chengdu, 610064, People’s Republic of China

    Yan Zhao, Xiaoyun Xu, Qiongyu Lai, Yanjing Hao, Ling Wang & Zhien Lin

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  1. Yan Zhao
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  2. Xiaoyun Xu
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  3. Qiongyu Lai
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  4. Yanjing Hao
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  5. Ling Wang
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Correspondence to Qiongyu Lai.

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Zhao, Y., Xu, X., Lai, Q. et al. Water-in-oil microemulsion method preparation and capacitance performance study of Li4Mn5O12 . J Solid State Electrochem 14, 1509–1513 (2010). https://doi.org/10.1007/s10008-009-0970-7

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  • DOI: https://doi.org/10.1007/s10008-009-0970-7

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