Effect of Ball-milling on the Hydrogen Storage Performance of Graphene Nanosheets
The effects of ball-milling parameters(ball-milling speed,ball-milling time,and ball-to-sample weight ratio)on the hydrogen storage properties of graphene were investigated,and the crystal structure analysis of ball-milled graphene was carried out using an X-ray diffractometer(XRD).The results showed that the hydrogen storage properties of graphene could be improved by using suitable ball-milling parameters,and too long ball-milling time,too fast ball-milling speed and too large a ball-to-sample weight ratio would lead to graphene agglomeration.When the ball-milling time was 12h,the ball-to-sample weight ratio was 320:1,and the ball-milling speed was 330r/min,the hydrogen storage performance of graphene was optimal,and the hydrogen storage capacity was 2.49wt％.
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