Electrochemical hydrogen storage property of Co–S alloy prepared by ball-milling method

High energy ball-milling preparation of Co–B amorphous alloy with high electrochemical hydrogen storage ability

“…Therefore, both of the multi-electron reaction of the boride alloys and the special amorphous structure of the powders may ensure the excellent capacity. Furthermore, it is reported that amorphous Co-B powders show superior electrochemical activities when used as anode materials in aqueous batteries [15,30,31]. In this work, it can also be found that the electrodes' maximum discharge capacity made of Co-B amorphous materials reaches 638.4 mAh/g (2.34 wt.% hydrogen).…”

Electrochemical hydrogen storage behaviors of nanostructured La1-xSrxCoO3 (x = 0-1.0) prepared by sol-gel method

“…The electrode presents a long and flat discharge plateau, showing the highest discharge capacity of 108.6 mAh g -1 at a current density of 30 mA g -1 at room temperature. The flat discharge plateaus appear around −0.85 V at different discharge current densities, which are similar to those of the typical AB 5 -type alloys [8]. Therefore, it is reasonable to attribute the discharge process to the dehydrogenation process.…”

“…However, hydrogen storage with a safe and cheap system is crucial for hydrogen fuel cells or hydrogen-driven combustion engines [1]. A variety of alloys have been investigated as hydrogen storage material, including AB 5 -type rare-earth metal alloys [2], AB 2 -type Laves phase alloys [3], AB-type intermetallic compounds [4], Mg-based alloys [5], alloy nanoparticles [6] and some transition metal-metalloid alloys, such as (Co-B, Co-S , and CoSi alloys [7][8][9][10]). Among these alloys, the AB 5 -type rare-earth metal alloys are widely used in commercial batteries because of their suitable plateau pressure and fast activation.…”

Co2P: A facile solid state synthesis and its applications in alkaline rechargeable batteries

“…Since Mitov et al [17] report that Co-B amorphous alloy has electrochemical hydrogen absorption-desorption properties in alkaline rechargeable batteries, more and more efforts have been paid to investigate the electrochemical properties of various transition metal-metalloid compounds. Wang et al [18] report Co-S alloy by ball milling of Co and S powders and obtain the highest discharge capacity of 350 mAh g −1 and excellent cycle stability as a negative material for Ni/MH batteries. He et al [19] investigate the hydrogen storage performances of Co-Si compound and propose the hydrogen storage mechanism as CoSi + H 2 O + e ↔ [CoSi-H] + OH − .…”