Preparation and study of characteristics of LiCoO 2 /Fe 3 O 4 /Li 2 B 2 O 4 nanocomposites as ideal active materials for electrochemical hydrogen storage.

The nanocomposites of LiCoO 2 /Fe 3 O 4 /Li 2 B 2 O 4 were designed by the Pechini route using different fuels for the optimization of their morphology and structure. Compared to other fuels, citric acid can act as both an ideal fuel and a capping agent. The ratio of the EG : H 2 O mixture is another parameter, which was studied in terms of its effects on the structural characterization. The optimized sample with a rod shape was selected to compare with the bulk sample through electrochemical hydrogen storage capacity. The discharge capacity for rod-shaped nanocomposites measured was 1284 mA h g -1 . However, the discharge capacity for the bulk morphology was calculated to be about 694 mA h g -1 . The magnetic, electrochemical and structural analyses were performed to investigate the properties of LiCoO 2 /Fe 3 O 4 /Li 2 B 2 O 4 nanocomposites.