ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

Leonardo W. Endler, Franciele Wolfart, Antônio S. Mangrich, Marcio Vidotti, and Luís F. Marchesi

Departamento de Química, Grupo de Pesquisa em Macromoléculas e Interfaces, Universidade Federal do Paraná, Curitiba, Brazil

E-mail: luismarchesi@utfpr.edu.br.com

Received: 27 March 2019  Accepted: 4 November 2019

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.

Keywords: Nanocomposite; Biochar; Nickel oxide; Double-layer capacitor; Energy storage

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00987-4

Chemical Papers 74 (5) 1471–1476 (2020)