Direct Membrane Deposition for CO2 Electrolysis

被引：18

作者：

Alkayyali, Tartela ^{[1
]}

Zeraati, Ali S. ^{[1
]}

Mar, Harrison ^{[2
]}

Arabyarmohammadi, Fatemeh ^{[1
]}

Saber, Sepehr ^{[1
]}

Miao, Rui K. ^{[1
]}

O'Brien, Colin P. ^{[1
]}

Liu, Hanshuo ^{[3
]}

Xie, Zhong ^{[3
]}

Wang, Guangyu ^{[2
]}

Sargent, Edward H. ^{[4
]}

Zhao, Nana ^{[3
]}

Sinton, David ^{[1
]}

机构：

[1] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

[2] Univ British Columbia, Dept Forest Resources Management, Vancouver, BC V6T 1Z4, Canada

[3] Natl Res Council Canada, Energy Min & Environm Res Ctr, Vancouver, BC V6T 1W5, Canada

[4] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 1A4, Canada

来源：

ACS ENERGY LETTERS | 2023年 / 8卷 / 11期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

CURRENT-VOLTAGE CURVES; BIPOLAR MEMBRANE; TRANSPORT; ELECTROREDUCTION; DENSITY; TOOL;

D O I：

10.1021/acsenergylett.3c01716

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The use of forward-bias bipolar membranes (f-BPM) in CO2 electrolyzers offers the advantage of avoiding costly CO2 reactant loss. However, current f-BPM-based electrolyzers require a high voltage and produce H-2 at the expense of CO2 reduction products. In this work, we develop a direct membrane deposition (DMD) approach that combines anion and cation exchange membranes (AEM and CEM, respectively) to increase transport and facilitate CO2 regeneration. The DMD approach provides flexibility to tune the properties of the composite and optimize the AEM:CEM ratio for low resistance and low H-2 evolution. Compared to a standard f-BPM, the DMD approach reduced the H-2 Faradaic efficiency by 2-fold (25% vs 12%, respectively), reduced mass transport resistance by over 50%, decreased full-cell potential by 0.84 V, increased the selectivity toward multicarbon products by over 2-fold (29% vs 65%, respectively), and achieved >17% in multicarbon product energy efficiency at 300 mA cm(-2).

引用

页码：4674 / 4683

页数：10

共 40 条

[1] Directly-Deposited Ultrathin Solid Polymer Electrolyte for Enhanced CO2 Electrolysis [J].