无机化学学报

单室固体氧化物燃料电池阴极材料La_0.75Sr_0.25Cr_0.5Mn_0.5O₃的电化学性能研究

Electrochemical Properties of Cathode Material La_0.75Sr_0.25Cr_0.5Mn_0.5O₃ for Single Chamber Solid Oxide Fuel Cell (SC-SOFC)

作者	单位
何　芳	黑龙江大学化学化工与材料学院，功能无机材料化学省部共建教育部重点实验室，哈尔滨 150080
孙丽萍	黑龙江大学化学化工与材料学院，功能无机材料化学省部共建教育部重点实验室，哈尔滨 150080
张国英	黑龙江大学化学化工与材料学院，功能无机材料化学省部共建教育部重点实验室，哈尔滨 150080
林　楠	黑龙江大学化学化工与材料学院，功能无机材料化学省部共建教育部重点实验室，哈尔滨 150080
赵　辉	黑龙江大学化学化工与材料学院，功能无机材料化学省部共建教育部重点实验室，哈尔滨 150080
Christophe　Pijolat	Ecole Nationale Supérieure des Mines, Centre SPIN, LPMG-URA CNRS 2021, Saint Etienne Cedex 2, France

摘要: 采用高温固相法制备了La_0.75Sr_0.25Cr_0.5Mn_0.5O₃(LSCM)并利用XRD，SEM以及电化学阻抗谱(EIS)分别对粉体及电极进行研究。结果发现LSCM在C₃H₈-O₂-N₂混合气氛下能够保持很好的高温化学稳定性，且与电解质材料YSZ在1 400 ℃空气气氛下不发生化学反应。电化学测试结果表明，阳极支撑型单室固体氧化物燃料电池Ni-YSZ|YSZ|LSCM在700 ℃、C₃H₈-O₂-N₂混合气氛下的短路电流密度达317 mA·cm^-2，最大功率密度73 mW·cm^-2。将LSCM与CGO形成梯度阴极，相同测试条件下，单室电池的短路电流密度为560 mA·cm^-2，功率密度达到110 mW·cm^-2，电池输出性能提高约50%。

关键词: 单室固体氧化物燃料电池干压法梯度阴极

基金项目:

Abstract: La_0.75Sr_0.25Cr_0.5Mn_0.5O₃(LSCM) was prepared by Solid State Reaction and studied by XRD, SEM and EIS spectrum, respectively. The results showed that LSCM maintains good chemical stability at high temperature in the reduced C₃H₈-O₂-N₂ atmosphere. This material has no reaction with YSZ at 1 400 ℃ in air. The short-circuit current density of the anode supported single chamber solid oxide fuel cell (SC-SOFC) Ni-YSZ|YSZ|LSCM reached 317 mA·cm^-2 and the maximum power density was 73 mW·cm^-2 at 700 ℃ in C₃H₈-O₂-N₂ mixed atmosphere. In the gradient cathode SC-SOFC, a short circuit current density of 560 mA·cm^-2 and the power density 110 mW·cm^-2 was obtained in the same test condition. In this way, the output performance of the cell increased by about 50%.

Keywords: SC-SOFC dry pressing method gradient cathode

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何　芳,孙丽萍,张国英,林　楠,赵　辉,Christophe　Pijolat.单室固体氧化物燃料电池阴极材料La_0.75Sr_0.25Cr_0.5Mn_0.5O₃的电化学性能研究[J].无机化学学报,2011,27(2):281-286.

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