Self-Assembled Nanocomposite Based on SrCo_0.7Fe_0.2Sc_0.1O_3-δ as an Efficient Intermediate-to-Low-Temperature SOFC Cathode

Wang, Haocong1,2; Zhu, Wanfeng2,4,5; Xu, Lanlan2,3; Gong, Jian2; Li, Wenjia4,5; Liu, Xiaojuan2

2024-06-26

10.1021/acsami.4c05284

ACS APPLIED MATERIALS & INTERFACES   影响因子和分区

1944-8244

1944-8252

The high performance of intermediate-to-low temperature solid oxide fuel cells (ILT-SOFCs) closely depends on the catalytic activity of the cathode material. However, most high-activity perovskite cathodes are rich in Sr and will arise from Sr segregation during the long-term working, resulting in the decay of activity and stability. Herein, by regulating the calcined way and temperature, a type of self-assembled nanocomposite perovskite cathode is developed, the stoichiometric SrCo0.7Fe0.2Sc0.1O3-delta (SCFSc) powder self-separates into a cubic phase (Pm3m, Sc-rich) and a tetragonal phase (P4/mmm, Sc-fewer). Meanwhile, a single cubic phase is prepared with the same formula via calcining the SCFSc pellet. It is found that the nanocomposite cathode shows better oxygen reduction reaction catalytic activity than single cubic SCFSc, caused by lower impedance of oxygen surface exchange and bulk diffusion. Particularly, the nanocomposite SCFSc cathode with the self-assembled heterointerfaces mitigates the Sr segregation and shows a peak power density of 1.17 W cm(-2) at 700 degrees C and excellent stability for similar to 101 h at 600 degrees C. This work provides a strategy for the development of nanocomposite cathodes to mitigate cation segregation and improve catalytic activity and stability.

solid oxide fuel cells cathode oxygen reductionreaction Sr segregation self-assembled perovskite

SCI ; EI

英语

通讯

National Natural Science Foundation of China[U2130114] ; Provincial Natural Science Foundation of Jilin["YDZJ202201ZYTS378","20230508174RC"] ; Jiangsu Funding Program for Excellent Postdoctoral Talent[2022ZB559]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001255577700001

AMER CHEMICAL SOC

20242716563126

Calcination ; Catalyst activity ; Electrocatalysts ; Electrolytic reduction ; Iron compounds ; Nanocomposites ; Oxygen ; Perovskite ; Solid oxide fuel cells (SOFC) ; Strontium ; Strontium compounds ; Temperature

Minerals:482.2 ; Ore Treatment:533.1 ; Alkaline Earth Metals:549.2 ; Thermodynamics:641.1 ; Fuel Cells:702.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933

Web of Science

1.Soochow Univ, Coll Energy, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China
2.Chinese Acad Sci, State Key Lab Rare Earth Resource Utilizat, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Chem & Phys, Changchun 130022, Peoples R China
4.Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Energy Storage, Shenzhen 518055, Peoples R China

Wang, Haocong,Zhu, Wanfeng,Xu, Lanlan,et al. Self-Assembled Nanocomposite Based on SrCo_0.7Fe_0.2Sc_0.1O_3-δ as an Efficient Intermediate-to-Low-Temperature SOFC Cathode[J]. ACS APPLIED MATERIALS & INTERFACES,2024,16(27):34988-34996.

Wang, Haocong,Zhu, Wanfeng,Xu, Lanlan,Gong, Jian,Li, Wenjia,&Liu, Xiaojuan.(2024).Self-Assembled Nanocomposite Based on SrCo_0.7Fe_0.2Sc_0.1O_3-δ as an Efficient Intermediate-to-Low-Temperature SOFC Cathode.ACS APPLIED MATERIALS & INTERFACES,16(27),34988-34996.

Wang, Haocong,et al."Self-Assembled Nanocomposite Based on SrCo_0.7Fe_0.2Sc_0.1O_3-δ as an Efficient Intermediate-to-Low-Temperature SOFC Cathode".ACS APPLIED MATERIALS & INTERFACES 16.27(2024):34988-34996.