Doping optimization mechanism of a bi-functional perovskite catalyst La0.8Sr0.2Co0.8Ni0.2O3-δ for Li-O2 battery cathode

被引：14
作者：
Cheng, Junfang [1 ,2 ]
Wang, Ziling [1 ]
Zou, Lu [1 ]
Zhang, Ming [3 ,4 ]
Zhang, Guozhu [5 ]
Dong, Yabin [6 ]
Jiang, Yuexing [1 ]
Huang, Yizhen [1 ]
Nakashima, Naotoshi [2 ]
Chi, Bo [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Ctr Fuel Cell Innovat, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res I2CNER, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China
[4] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China
[5] Kyushu Univ, Inst Mat Chem & Engn, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan
[6] Shenzhen Acad Aerosp Technolog, Adv Mat Res Inst, Shenzhen 518057, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 831卷
基金：
日本科学技术振兴机构;
关键词：
Li-O-2; batteries; Perovskite LSCN; Doping optimization; Catalytic mechanism; HIGHLY EFFICIENT ELECTROCATALYST; BIFUNCTIONAL CATALYST; LACOO3; PEROVSKITE; ULTRAHIGH-CAPACITY; OXYGEN VACANCIES; CYCLE LIFE; OXIDE; LA0.6SR0.4COO3-DELTA; PERFORMANCE; STABILITY;
D O I：
10.1016/j.jallcom.2020.154728
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Perovskite oxides with low cost and high catalytic activity are reported as suitable cathode catalysts for the Li-O-2 batteries (LOBs), while their catalytic mechanism is not yet fully clarified. Herein, La0.8Sr0.2Co0.8Ni0.2O3-delta (LSCN8282) perovskite oxide is used as a cathode catalyst for the LOBs and further improved by adjusting the Co/Ni ratio in the B-site. Thus, La0.8Sr0.2Co0.6Ni0.4O3-delta (LSCN8264) and La0.8Sr0.2Co0.6Ni0.6O3-delta (LSCN8246) are also synthesized and used as cathode catalysts for the LOBs. Among the obtained perovskite catalysts in this study, LSCN8264 shows the highest electrochemical activity in 1 M KOH and best catalytic effectivity when used in the LOBs. The catalytic mechanism and doping optimization are clarified by analyzing the morphology of the discharge products and the X-ray photoelectron spectroscopy (XPS) of the perovskite oxides. (C) 2020 Elsevier B.V. All rights reserved.
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页数：10
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