Fuel cell performance improvement via the steric effect of a hydrocarbon-based binder for cathode in proton exchange membrane fuel cells

被引：8

作者：

Cha, Jung-Eun ^{[1
,2
]}

Cho, Won Jae ^{[3
]}

Hwang, Jeemin ^{[1
]}

Seo, Dong-Jun ^{[1
]}

Choi, Young-Woo ^{[1
]}

Kim, Won Bae ^{[2
]}

机构：

[1] Korea Inst Energy Res KIER, Hydrogen Energy Res Div, Fuel Cell Res & Demonstrat Ctr, 20-41 Sinjaesaengene Ro, Buan Gun 56332, Jeollabuk Do, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea

[3] Clean & Sci Co Ltd, Factory 67,3Sandan 3gil, Jeongeup Si 56137, Jeollabuk Do, South Korea

来源：

SCIENTIFIC REPORTS | 2022年 / 12卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

RANDOM STATISTICAL COPOLYMERS; TRANSPORT-PROPERTIES; CATALYST; ELECTROLYTE; FABRICATION; MORPHOLOGY; ENERGY;

D O I：

10.1038/s41598-022-18464-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this study, a sulfonated poly(ether sulfone) having cardo-type fluorenyl groups (FL-SPES) was investigated as a cathodic binder to improve fuel cell performance via increased the oxygen diffusion in the cathode. The maximum power density achieved by using the membrane electrode assembly (MEA) prepared with FL-SPES with a low ion exchange capacity (IEC) of 1.31 meq g(-1) was 520 mW cm(-2), which is more than twice as high as that of BP-SPES (210 mW cm(-2)) having typical biphenyl groups with a similar IEC. At high IEC of 1.55 meq g(-1), the power density obtained by using BP-SPES was improved to 454 mW cm(-2) but remained lower than that of FL-SPES. In addition, although the IEC, swelling degree, and specific resistance were similar to each other, the gas permeability of FL-SPES was improved by approximately three times compared to that of BP-SPES. The steric structure of cardo-type FL-SPES increased the free volume between the polymer backbones, leading to an increase in gas transfer. Consequently, oxygen diffusion was promoted at the cathode, resulting in improved fuel cell performance.

引用

页数：8

共 33 条

[1] Interaction Regulation Between Ionomer Binder and Catalyst: Active Triple-Phase Boundary and High Performance Catalyst Layer for Anion Exchange Membrane Fuel Cells [J].