甘氨酸-硝酸盐法合成GdBaCo2O5+δ阴极材料及其性能

doi:10.3724/SP.J.1077.2012.11488

无机材料学报 ›› 2012, Vol. 27 ›› Issue (7): 751-756.DOI: 10.3724/SP.J.1077.2012.11488

甘氨酸-硝酸盐法合成GdBaCo₂O_5+δ阴极材料及其性能

靳宏建, 王欢, 张华, 金江

(南京工业大学材料科学与工程学院, 南京 210009)

收稿日期:2011-08-08 修回日期:2011-10-01 出版日期:2012-07-20 网络出版日期:2012-06-06
作者简介:靳宏建(1986-), 男, 硕士研究生. E-mail: njut_jinhongjian@163.com
基金资助:
江苏高校优势学科建设资助项目

Synthesis and Characterization of GdBaCo₂O_5+δ Cathode Material by Glycine-nitrate Process

JIN Hong-Jian, WANG Huan, ZHANG Hua, JIN Jiang

(College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)

Received:2011-08-08 Revised:2011-10-01 Published:2012-07-20 Online:2012-06-06
About author:JIN Hong-Jian. E-mail: njut_jinhongjian@163.com
Supported by:
Priority Academic Program Development of Jiangsu Higher Education Institutions

摘要/Abstract

摘要： 采用甘氨酸-硝酸盐法(GNP)制备中温固体氧化物燃料电池(IT-SOFC)GdBaCo₂O_5+δ(GBCO)阴极材料, 探索甘氨酸与金属阳离子摩尔比(G/M)等合成条件对产物性能的影响, 研究了GBCO的微观形貌、晶体结构、电导率和电化学性能. 结果表明, G/M为3.0的阴极粉料(GBCO-3.0)颗粒细小均匀且比表面积大, G/M在2.5~3.5之间制备的粉料经1000℃煅烧5 h可形成结晶度高的GBCO纯相. 阴极材料GBCO与电解质材料Sm_0.2Ce_0.8O_1.9(SDC)在1100℃混合煅烧, 未发生明显的化学反应. 在500~800℃范围内, GBCO阴极的电导率均大于100 S/cm. 1050℃煅烧的GBCO-3.0阴极的极化电阻(R_p)最小, 750℃为0.125 Ω·cm².

关键词: GdBaCo₂O_5+δ, 电导率, 电化学性能, 甘氨酸–硝酸盐法, 阴极

Abstract: GdBaCo₂O_5+δ (GBCO) powders were synthesized by the glycine-nitrate process (GNP) with different glycine/metal ratios (G/M) and characterized as cathode material for intermediate temperature solid oxide fuel cell(IT-SOFC). The effects of G/M ratios on the performance and properties of GBCO electrodes including the morphology, crystal structure, electrical conductivity and electrochemical properties were evaluated. The GBCO powder synthesized at G/M ratio of 3.0 (GBCO-3.0) showed the highest specific surface area. XRD results proved that the precursor powders calcined at 1000℃ for 5 h formed GBCO single-phase when the ratio of glycine to metal was in the range of 2.5–3.5. There were no chemical reaction occurred between the GBCO cathode and the Sm_0.2Ce_0.8O_1.9 (SDC) electrolyte after calcination at 1100℃. The electrical conductivities of all GBCO cathodes were over 100 S/cm at intermediate temperature (500–800℃). The GBCO-3.0 cathode calcined at 1050℃ exhibited the lowest polarization resistance (R_P) of 0.125 Ω·cm² at 750℃.

Key words: GdBaCo₂O_5+δ, electrical conductivity, electrochemical performance, glycine-nitrate process, cathode

中图分类号:

TM911

靳宏建, 王欢, 张华, 金江. 甘氨酸-硝酸盐法合成GdBaCo₂O_5+δ阴极材料及其性能[J]. 无机材料学报, 2012, 27(7): 751-756.

JIN Hong-Jian, WANG Huan, ZHANG Hua, JIN Jiang. Synthesis and Characterization of GdBaCo₂O_5+δ Cathode Material by Glycine-nitrate Process[J]. Journal of Inorganic Materials, 2012, 27(7): 751-756.

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甘氨酸-硝酸盐法合成GdBaCo₂O_5+δ阴极材料及其性能

Synthesis and Characterization of GdBaCo₂O_5+δ Cathode Material by Glycine-nitrate Process

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