Perovskite La0.6Sr0.4Co0.2Fe0.8O3 as an effective electrocatalyst for non-aqueous lithium air batteries

被引：53

作者：

Cheng, Junfang ^{[1
]}

Zhang, Ming ^{[1
]}

Jiang, Yuexing ^{[1
]}

Zou, Lu ^{[1
]}

Gong, Yingpeng ^{[1
]}

Chi, Bo ^{[1
]}

Pu, Jian ^{[1
]}

Jian, Li ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Ctr Fuel Cell Innovat, State Key Lab Mat Proc & Die & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2016年 / 191卷

关键词：

Lithium air batteries; Perovskite LSCF; Electrochemical activity; Catalytic mechanism; Overpotential; EFFICIENT ELECTROCATALYST; BIFUNCTIONAL CATALYST; DEFECT CHEMISTRY; SURFACE-PROPERTIES; OXIDE; CO; TEMPERATURE; PERFORMANCE; ELECTRODES; STABILITY;

D O I：

10.1016/j.electacta.2016.01.058

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Non-aqueous lithium air batteries with high energy density have been regarded to be the most attractive contender in the future energy storage techniques. Herein, the perovskite La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) nanoparticles are studied as the cathode catalyst for non-aqueous lithium air batteries. The results confirm that nanostructured LSCF exhibits admirable electrochemical activity and can effectively reduce the overpotential. Batteries with LSCF catalyst can increase the discharge capacity from 9678 mAh g(-1) to 13979 mAh g(-1) and improve the cycle stability from 10 cycles to 20 cycles at 200 mA g(-1). The study reveals that the formation and decomposition processes of Li2O2 can be effectively promoted by the introduction of LSCF nanoparticles. The possible catalytic mechanism of LSCF in reducing overpotential is also proposed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：106 / 115

页数：10

共 48 条

[1] Synthesis and characterisation of La1-xCaxFeO3 perovskite-type oxide catalysts for total oxidation of volatile organic compounds [J].