An-Soo Kang

The Preparation and Characteristics of Covalently Cross-Linked SPEEK/Cs-TPA/Ceria Composite Membranes for Water Electrolysis

Abstract >> Ceria (CeO 2 ) was used to scavenge free radicals which attack the membrane in the polymer electrolytemembrane water electrolysis (PEMWE) circumstance and to increase the duration of the membrane. In order to improve the electrochemical, mechanical and electrocatalytic characteristics, engineering plastic of the sulfonatedpolyether ether ketone (SPEEK) as polymer matrix was prepared in the sulfonation reaction of polyether ether ketone (PEEK) and the organic-inorganic blended composite membranes were prepared by sol-gel casting methodwith loading the highly dispersed ceria and cesium-substituted tungstophosphoric acid (Cs-TPA) with cross-linkingagent contents of 0.01 mL. In conclusion, CL-SPEEK/Cs-TPA/ceria (1%) membrane showed the optimum results such as 0.130 S/cm of proton conductivity at 80℃, 2.324 meq./g-dry-membrane of ion exchange capacity and mechanical characteristics, and 65.03 MPa of tensile strength which were better than Nafion 117 membrane. Key words : Ceria(Cerium(IV) oxide, 세리아), SPEEK(술폰화 폴리에테르에테르케톤), PEMWE(고분자 전해질막 수전해), Covalently cross-link(공유가교결합), Cs-TPA(Cs-substituted TPA), Oxidative stability(산화내구성), Radical scavenger(라디칼 스캐빈져)

Research of Characterization of Covalently Cross-linked SPEEK/Cs-Substituted MoPA/Ceria 1wt% Composite Membrane for Water Electrolysis

Ceria () was used to scavenge free radicals which attack the membrane in the polymer electrolyte membrane water electrolysis (PEMWE) circumstance and to increase the duration of the membrane. In order to improve the electrochemical, mechanical and electrocatalytic characteristics, engineering plastic of the sulfonated polyether ether ketone (SPEEK) as polymer matrix was prepared in the sulfonation reaction of polyether ether ketone (PEEK) and the organic-inorganic blended composite membranes were prepared by sol-gel casting method with loading the highly dispersed ceria and cesium-substituted phophomolybdic acid(Cs-MoPA) with cross-linking agent contents of 0.01mL. In conclusion, CL-SPEEK/-MoPA/ceria(1%) membrane showed the optimum results such as 0.1095S/cm of proton conductivity at , 2.906meq./g-dry-membrane of ion exchange capacity and mechanical characteristics, and 49.73MPa of tensile strength which were better than Nafion 117 membrane.