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ChemistryOpen Volume 8 ,Issue 2 ,2019-02-14
Efficiency of 3D‐Ordered Macroporous La0.6Sr0.4Co0.2Fe0.8O3 as an Electrocatalyst for Aprotic Li‐O2 Batteries
Communications
Junfang Cheng 1 , 2 Yuexing Jiang 1 Lu Zou 1 Ming Zhang 3 Guozhu Zhang 4 Ziling Wang 1 Yizhen Huang 1 Bo Chi 1 Jian Pu 1 Li Jian 1
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DOI:10.1002/open.201800247
Received 2018-11-09,
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摘要

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 La0.6Sr0.4Co0.2Fe0.8O3 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 La0.6Sr0.4Co0.2Fe0.8O3 (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.

关键词

catalytic efficiency;overpotential;nanostructures;perovskite phases;Li-O batteries

授权许可

© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim

图表

X‐ray diffraction patterns of precursors calcined at different temperatures.

SEM image of a) the 3D‐LSCF after calcined in 600 °C and b) the LSCF prepared by sol‐gel method.

Full discharge‐charge curves of LOBs with different cathodes at current density of 400 mA g−1.

Cycle performances of LOBs with a) LSCF‐SP and b) 3D‐LSCF/SP cathodes at current density of 400 mA g−1.

Table 1

通讯作者

Bo Chi.Center for Fuel Cell Innovation, Huazhong University of Science and Technology, Wuhan, 430074, China.chibo@hust.edu.cn

推荐引用方式

Junfang Cheng,Yuexing Jiang,Lu Zou,Ming Zhang,Guozhu Zhang,Ziling Wang,Yizhen Huang,Bo Chi,Jian Pu,Li Jian. Efficiency of 3D‐Ordered Macroporous La0.6Sr0.4Co0.2Fe0.8O3 as an Electrocatalyst for Aprotic Li‐O2 Batteries. ChemistryOpen ,Vol.8, Issue 2(2019)

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