Preparation and electrochemical properties of NiMn2O4 spinel oxide cathode

被引：0
|
作者：
Xiao Y. [1 ]
Xu C. [1 ]
Yang X. [1 ]
Zhang L. [1 ]
Sun W. [1 ,2 ]
Qiao J. [1 ,2 ]
Wang Z. [1 ,2 ]
Sun K. [1 ,2 ]
机构：
[1] School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing
[2] Beijing Key Laboratory of Chemical Power and Green Catalysis, Beijing
来源：
Sun, Wang (sunwang@bit.edu.cn) | 1600年 / Materials China卷 / 71期
关键词：
Catalysis; Cathode; Electrochemistry; Fuel cells; Oxygen reduction; Spinel;
D O I：
10.11949/0438-1157.20200532
中图分类号：
学科分类号：
摘要：
Developing high-performance cathode materials is of great significance to promote the development of intermediate temperature solid oxide fuel cells (IT-SOFCs). In this paper, the spinel-type NiMn2O4 (NMO) electron-ion mixed conductor material was prepared by the sol-gel method, and it was systematically studied as the cathode of IT-SOFCs. It is found that NMO material has stable cubic phase structure by using X-ray diffraction (XRD) and the conductivity of oxygen ions is studied by the technique of electrical conductivity relaxation (ECR). It shows that NMO has excellent oxygen-ion conductivity, which provides guarantee for its electrochemical performance. Impedance spectroscopy measurements of a symmetrical cell shows a low interface impedance, which is only 0.27 Ω•cm-2 at 800℃. At the same time, an anode-supported SOFC with NMO cathode presents a maximum power density of 864.9 mW•cm-2 at 800℃. The above results demonstrate that NiMn2O4 is a potential cathode material for IT-SOFCs. © 2020, Chemical Industry Press Co., Ltd. All right reserved.
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页码：4292 / 4302
页数：10
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