Calcined chicken eggshell electrode for battery and supercapacitor applications.

Biowaste eggshell can be used as a cathode while in its calcined form and it is found to be suitable as an anode in an electrochemical cell. This not only enables energy to be stored reversibly but also achieves waste management and sustainability goals by redirecting material away from landfill. Biowaste eggshell comprises 94% calcium carbonate (CaCO; calcite), an attractive divalent ion source as a viable option for energy storage.

Phase evolution in calcium molybdate nanoparticles as a function of synthesis temperature and its electrochemical effect on energy storage.

The design of a suitable electrode is an essential and fundamental research challenge in the field of electrochemical energy storage because the electronic structures and morphologies determine the surface redox reactions. Calcium molybdate (CaMoO) was synthesized by a combustion route at 300 °C and 500 °C. We describe new findings on the behaviour of CaMoO and evaluate the influence of crystallinity on energy storage performance.