Achieving excellent and durable CO2 electrolysis performance on a dual-phase fuel electrode in solid oxide electrolysis cells

Li, Yihang1,2; Li, Yanpu1; Yu, Lixiang1; Hu, Qicheng1; Wang, Qi3; Maliutina, Kristina1,2; Fan, Liangdong1,4

2021-04-15

10.1016/j.jpowsour.2021.229599

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

Conversion of CO2 into valuable chemicals through solid oxide electrolysis cells (SOECs) is a promising technology towards efficient utilization of CO2 and reducing its emission. However, the well-established Ni-cermet fuel electrode is not applicable for high-concentration or pure CO2 electrolysis due to the Ni oxidation and coking issues. Here, we report that a novel nominal Pr0.2Ca0.8Fe0.8Ni0.2O3-delta perovskite fuel electrode, which is self-assembled into Pr(Ca)Fe(Ni)O3-delta perovskite and Ca2Fe2O5 brownmillerite dual-phase composite during the calcination process, possesses efficient CO2 electrolysis activity. The presence of Ca2Fe2O5 with abundant oxygen vacancies significantly improves CO2 chemical adsorption and activation and Pr(Ca)Fe(Ni)O3-delta serves charge carrier matrix, and consequently leads to a high CO2 reduction reaction rate constant of 1.104 x 10(-4) cm(-1) at 800 degrees C as determined by the electrical conductivity relaxation method. The electrochemical performance of pure CO2 electrolysis is investigated in model SOECs, exhibiting an excellent current density of 0.648 Acm(-2) at 1.5 V and 800 degrees C. Moreover, the cell shows no noticeable degradation under two constant current densities of 0.421 Acm(-2) at 800 degrees C and 0.3 Acm(-2) at 700 degrees C for nearly a total of 300 h. The present study reveals a novel strategy to develop dual-phase Pr(Ca)Fe(Ni)O3-delta-Ca2Fe2O5 materials as a reliable electrode for pure CO2 electrolysis.

Solid oxide electrolysis cell CO2 reduction Fuel electrode Self-assembly Durability

SCI ; EI

英语

其他

National Natural Science Foundation[52002249,51402093] ; Guangdong Basic and Applied Basic Research Foundation["2019A1515110025","2017A030313289"] ; Research Grant for Scientific Platform and Project of Guangdong Provincial Education office[2019KTSCX151] ; Shenzhen Government's Plan of Science and Technology[JCYJ20180305125247308] ; China Postdoctoral Science Foundation[2020M682872]

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000632252800003

ELSEVIER

20210709911157

Carbon dioxide ; Electrodes ; Electrolysis ; Electrolytic cells ; Fuels ; Perovskite ; Praseodymium compounds ; Rate constants ; Regenerative fuel cells ; Solid oxide fuel cells (SOFC)

Minerals:482.2 ; Fuel Cells:702.2 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2

MATERIALS SCIENCE

Web of Science

1.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China
2.Shenzhen Univ, Minist Educ Guangdong Prov, Key Lab Optoelect Devices & Syst, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Shenzhen Univ, Shenzhen Key Lab New Lithium Ion Batteries & Meso, Shenzhen 518060, Guangdong, Peoples R China

Li, Yihang,Li, Yanpu,Yu, Lixiang,et al. Achieving excellent and durable CO2 electrolysis performance on a dual-phase fuel electrode in solid oxide electrolysis cells[J]. JOURNAL OF POWER SOURCES,2021,491.

Li, Yihang.,Li, Yanpu.,Yu, Lixiang.,Hu, Qicheng.,Wang, Qi.,...&Fan, Liangdong.(2021).Achieving excellent and durable CO2 electrolysis performance on a dual-phase fuel electrode in solid oxide electrolysis cells.JOURNAL OF POWER SOURCES,491.

Li, Yihang,et al."Achieving excellent and durable CO2 electrolysis performance on a dual-phase fuel electrode in solid oxide electrolysis cells".JOURNAL OF POWER SOURCES 491(2021).