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Facile method to prepare biochar–NiO nanocomposites as a promisor material for electrochemical energy storage devices

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Abstract

A new nanocomposite material based on biochar and nickel oxide (BC–NiO) was prepared by a simple co-precipitation method, using exhausted Acacia mearnsii de Wild as the biomass and nickel salts. The nanocomposite was obtained by pyrolysis at 700 °C and characterized by Raman spectroscopy, transmission electronic microscopy and DRX. Electrodes were assembled and the electrochemical properties were evaluated by cyclic voltammetry and galvanostatic charge/discharge curves. The specific capacitance of 10.66 F g−1 was found in an asymmetric configuration, presenting an interesting alternative for energy storage devices.

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Acknowledgements

The authors thank the Brazilian agencies CAPES (001) and CNPq (155740/2016-4) for the financial support and Centro de Microscopia Eletrônica (CME-UFPR) for the TEM facilities.

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Correspondence to Luís F. Marchesi.

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Endler, L.W., Wolfart, F., Mangrich, A.S. et al. Facile method to prepare biochar–NiO nanocomposites as a promisor material for electrochemical energy storage devices. Chem. Pap. 74, 1471–1476 (2020). https://doi.org/10.1007/s11696-019-00987-4

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  • DOI: https://doi.org/10.1007/s11696-019-00987-4

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