Fabrication of a flat V3+/Fe3+ redox microbattery from gold compact disk using drilling technique

•A flat V3+/Fe3+ redox microbattery on commercially available gold compact disk.•Microbattery's tubular band electrodes are fabricated via drilling technique.•The V3+/Fe3+ redox microbattery array is tunable in terms of voltage and current.

Here a simple design which could be developed for flat redox microbattery array with tunable output power is introduced. The fabrication of a V3+/Fe3+ redox microbattery using the gold compact disk (CD) as the electrode material and employing drilling technique to fabricate band electrodes is reported. The as-fabricated V3+/Fe3+ redox microbattery shows very attractive performance such as rechargeability, very high power and current density, low cost and simplicity of fabrication. Also microbattery arrays could be stacked very easily to achieve proper voltage, current and output power. Polarization and power curves and charge–discharge cycles are obtained to characterize as-fabricated microbatteries.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide