121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-567
Subject Preparation and characteriztion of polyoxometal tungstophosphoric acid bonded polyether ether ketone composite membrane and the membrane electrode assembly for water electrolysis
Authors BOYOUNG KIM, Jang Hoon Chung*
Department of Chemistry, Myungji University, Korea
Abstract Polyoxometal tungstophosphoric acid (TPA) bonded polyether ether ketone (PEEK) composite membrane for water electrolysis and the membrane electrode assembly were prepared. Covalently cross-linked (CL) sulfonated polyether ether ketone (SPEEK) was prepared in sulfonation of PEEK, cross linkage reaction with 1,4-diiodobutane, and addition with TPA. PEEK was covalently cross-linked with 1,4-diiodobutane to improve mechanical strength and was added with TPA to increase proton conductivity. TPA should be fixed to back bone of SPEEK to prevent bleeding out. Therefore, the carbonyl group of SPEEK was reduced with NaBH4 and 3-isocyanatepropyltriethoxysilane (ICPTES) was added. The TPA bonded composite was produced in the reaction of TPA with 3-mercaptopropyltrimethoxvsilane (MPTMS). This composite membrane was used as an electrolyte to prepare the membrane electrode assembly (MEA), Pt-Pd/PEM/Pd (MEA I) , and Pt/PEM/Pt (MEA II) by means of non-equilibrium impregnation-reduction method. MEA I is better than MEA II in electrocatalytic property. Cell voltage and efficiency of MEA I are 2.687 V and 65.5 %, respectively.
E-mail boyoung3697@naver.com