Electrochemical Properties of La2Mg17Ni Electrodes Prepared via TiF3-Catalysed Mechanical Milling

الملخص EN

In order to improve the hydrogen storage capacity of conventional La2Mg17 electrode alloys, a nanocrystalline/amorphous-structured La2Mg17-Ni composite material was produced by high energy ball milling in the presence of TiF3.

Subsequent analysis of the discharge/charge cycle performances of this electrode material revealed that its cycle stability and electrochemical capacity were greatly improved, with the latter reaching a maximum value of 787.07 mAh/g with optimisation of the TiF3 addition.

Moreover, a remarkable enhancement in the reversibility of electrochemical reactions on the material’s surface was also observed.

Hydrogen diffusion coefficients for the material were calculated by means of a potential step method, confirming that TiF3 markedly improves the long-range diffusion of hydrogen within the material.