TY - SER AU - li, Ye AU - Xie, Min TI - Novel Branched Sulfonated Poly(Ether Ether Ketone)S Membranes for Direct Methanol Fuel Celis KW - Branched Polymer KW - Polymer Electrolyte Membrane (Pem) KW - Sulfonated Poly(Ether Ether Ketone)S ER -