Originally Posted by 
JDNSW
				 
			Not quite right.
"Steam methane reforming (SMR) is a method of producing hydrogen from natural gas, which is mostly methane (CH4).  It is currently the cheapest source of industrial hydrogen. Nearly 50%  of the world's hydrogen is being produced by this method."
Electrolysis accounts for about 4%, and is the method espoused by hydrogen vehicle proponents. It produces hydrogen at about three times the cost of steam methane reforming. 
There are a whole range of other technologies, none of which are individually very significant and coal is not a major one.
Compared to battery storage of electricity, which is currently well over 90% efficiency, the process of converting electricity to hydrogen and then back to electricity is only at best about 60% efficient.