About: http://webisa.webdatacommons.org/126958713

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Polymer electrolyte membrane electrochemical systems, such as fuel cells, offer many advantages over competing energy conversion technologies in terms of energy density and lifetimes.
http://www.w3.org/ns/prov#wasQuotedFrom	sbir.gov