Increasing gas sorption onto carbon by milling with alumina

Graphite milled alone for 50 h shows an increase in gas sorption of a factor of three over unmilled powder. When graphite is milled in the presence of a much harder phase, aluminium oxide, the increase in sorption is much greater with a seven fold increase achieved after 5 h milling. Extending the milling time resulted in increased capacity; an estimated capacity of 2.5 g/ g carbon was achieved after 50 h milling.