Abstract
Carbon-related materials have been a potential candidate as a new hydrogen storage material. In this study, kish graphite powder, which is a low-cost carbon material produced through the steelmaking process, was mechanically milled under H2 atmosphere, and its dehydrogenation properties were investigated. The layer structure of kish graphite was mostly destructed after milling for 20 h, and contamination of Fe and stainless steel from a stainless steel vial and balls occurred. The mechanical milling was effective for increasing hydrogen content in the powder and decreasing hydrogen desorption temperature, and there were three desorption peaks in the TDS (thermal desorption spectroscopy) curve of the sample milled for 20 h. It was also found that V and Fe addition reduced the dehydrogenation temperatures and enhanced dehydrogenation corresponding to the second peak in the TDS curve.
