On the use of a naturally-sourced CuFeS2 mineral concentrate for energy storage

We report the first use of a CuFeS2 froth flotation mineral concentrate (MC) as an energy storage material in a fixed bed flow cell (FBFC). The performance of a graphite felt (GF) MC negative electrode (GF–MC) was also compared to a synthetic CuFeS2 electrode in the same FBFC. The Fe(II)/Fe(III) redox reaction (in the presence of Cu(II)) on the GF positive electrode (GF–Fe/Cu) supported the charge/discharge process. The kinetic parameters...