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Synthesis of cobalt phosphate nanoflakes for high-performance flexible symmetric supercapacitors

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Abstract

Herein, leaf-like Co3(PO4)2 was synthesized via a simple and low-cost approach without adding any additional surfactant. Such leaf-like Co3(PO4)2 showed the high crystallinity as proved by spectra analysis. The electrochemical performance of as-synthesized Co3(PO4)2 was firstly characterized in a three-electrode system, which shows the specific capacitance of 410 F g− 1 at the current density of 1.0 A g− 1. Furthermore, flexible symmetric supercapacitor was fabricated with PVA-KOH gel electrolyte, exhibiting the specific capacitance of 165 F g− 1 at a current density of 0.5 A g− 1 with a high energy density of 52.8 Wh kg− 1 at a power density of 756 W kg− 1. This superior performance is attributed to the unique morphology and fast surface redox reaction. These excellent results suggested that Co3(PO4)2 nanoflakes are promising materials for potential application in high-performance flexible energy storage devices.

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Acknowledgements

This work is supported by Zhejiang Provincial Natural Science Foundation of China (LQ15E080007). H. Mao thanks the support from **hua Science and Technology Bureau (2018-4-105).

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Authors and Affiliations

  1. Pharmaceutical and Material Engineering School, **hua Polytechnic, **hua, 321000, Zhejiang, People’s Republic of China

    Hui Mao, Fangfang Zhang, Jian** Qiu & Zhunian **

  2. Department of Institute for Basic Science (IBS) and Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea

    **nghui Liu

  3. Department of Materials Science and Engineering, KAIST, Daejeon, 34141, Republic of Korea

    Bing Li

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  1. Hui Mao
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Correspondence to Hui Mao or Zhunian **.

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Mao, H., Zhang, F., Liu, X. et al. Synthesis of cobalt phosphate nanoflakes for high-performance flexible symmetric supercapacitors. J Mater Sci: Mater Electron 29, 16721–16729 (2018). https://doi.org/10.1007/s10854-018-9765-x

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