Efficiency of 3D-Ordered Macroporous La0.6Sr0.4Co0.2Fe0.8O3 as an Electrocatalyst for Aprotic Li-O2 Batteries

Junfang Cheng; Yuexing Jiang; Lu Zou; Ming Zhang; Guozhu Zhang; Ziling Wang; Yizhen Huang; Bo Chi; Jian Pu; Li Jian

doi:10.1002/open.201800247

Efficiency of 3D-Ordered Macroporous La_0.6Sr_0.4Co_0.2Fe_0.8O₃ as an Electrocatalyst for Aprotic Li-O₂ Batteries

ChemistryOpen. 2019 Feb 14;8(2):206-209. doi: 10.1002/open.201800247. eCollection 2019 Feb.

Authors

Junfang Cheng^{1

2}, Yuexing Jiang¹, Lu Zou¹, Ming Zhang³, Guozhu Zhang⁴, Ziling Wang¹, Yizhen Huang¹, Bo Chi¹, Jian Pu¹, Li Jian¹

Affiliations

¹ Center for Fuel Cell Innovation Huazhong University of Science and Technology Wuhan 430074 China.
² International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan.
³ Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China.
⁴ Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasuga-Koen, Kasuga Fukuoka 816-8580 Japan.

Abstract

Li-O₂ batteries (LOBs) with an extremely high theoretical energy density have been reported to be the most promising candidates for future electric storage systems. Porous catalysts can be beneficial for LOBs. Herein, 3D-ordered macroporous La_0.6Sr_0.4Co_0.2Fe_0.8O₃ perovskite oxides (3D-LSCF) are applied as cathode catalysts in LOBs. With a high Brunauer-Emmett-Teller surface area (21.8 m² g^-1) and unique honeycomb-like macroporous structure, the 3D-LSCF catalysts possess a much higher efficiency than La_0.6Sr_0.4Co_0.2Fe_0.8O₃ (LSCF) nanoparticles. The unique 3D-ordered macropores play a significant role in the product deposition as well as oxygen and electrolyte transmission, which are crucial for the discharge-charge processes of LOBs.

Keywords: Li-O2 batteries; catalytic efficiency; nanostructures; overpotential; perovskite phases.