Cation Segregation of A-Site Deficiency Perovskite La0.85FeO3-δ Nanoparticles toward High-Performance Cathode Catalysts for Rechargeable Li-O2 Battery

被引：34

作者：

Cong, Yingge ^{[1
]}

Geng, Zhibin ^{[1
]}

Sun, Yu ^{[1
]}

Yuan, Long ^{[1
]}

Wang, Xiyang ^{[1
]}

Zhang, Xinbo ^{[3
]}

Wang, Lei ^{[4
]}

Zhang, Wei ^{[2
]}

Huang, Keke ^{[1
]}

Feng, Shouhua ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China

[2] Jilin Univ, Sch Mat Sci & Engn, Changchun 130012, Jilin, Peoples R China

[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China

[4] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 30期

基金：

中国国家自然科学基金;

关键词：

Li-O-2; battery; perovskite; cation segregation; catalysts; oxygen electrode; OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; BIFUNCTIONAL CATALYST; IRON-OXIDE; DOPED GRAPHENE; LAFEO3; CARBON; COMPOSITE; ALPHA-FE2O3; NANOFLAKES;

D O I：

10.1021/acsami.8b07924

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cation segregation of perovskite oxide is crucial to develop high-performance catalysts. Herein, we achieved the exsolution of alpha-Fe2O3 from parent La0.85FeO3-delta by a simple heat treatment. Compared to alpha-Fe2O3 and La0.85FeO3-delta, alpha-Fe2O3-LaFeO3-x achieved a significant improvement of lithium-oxygen battery performance in terms of discharge specific capacity and cycling stability. The promotion can be attributed to the interaction between alpha-Fe2O3 and LaFeO3-x. During the cycling test, alpha-Fe2O3-LaFeO3-x can be stably cycled for 108 cycles at a limited discharge capacity of 500 mAh g(-1)at a current density of 100 mA g(-1) which is remarkably longer than those of La(0.85)Feo(3-delta )(51 cycles), alpha-Fe2O3 (21 cycles), and mechanical mixing of LaFeO3 and alpha-Fe2O3 (26 cycles). In general, these results suggest a promising method to develop efficient lithium-oxygen battery catalysts via segregation.

引用

页码：25465 / 25472

页数：8

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