the accumulated hydrogen volume per unit weight. The
hydrogen generation rate of the 5 vol. % CNTs/Al composite at
50 MPa was 40 ml/min g, and lasted for 50 min with 0.3 g. In
contrast, the hydrogen generation rate of the 5 vol. % CNTs/Al
composite formed at 20 MPa is 120 ml/min g; the produced
hydrogen consumed in 20 min due to the faster hydrogen
generation rate. A stable hydrogen generation rate above
120 ml/min g was maintained after 2 min of hydrolysis.