新型电解质材料CaZr_(0.1)Ti_(0.9)O

应用化学, 2009, 26(11): 1320-1323. doi: 10.3969/j.issn.1000-0518.2009.11.015

新型电解质材料CaZr_(0.1)Ti_(0.9)O_3的制备与电性能

程继海 ^1, , 鲍巍涛 ^2, , 朱德春 ^3, , 王华林 ^4, , 田长安 ^5, , 尹奇异 ^6,

1.合肥学院化学与材料工程系,合肥,230022;合肥学院粉体与能源材料重点实验室,合肥,230022

2.合肥学院化学与材料工程系,合肥,230022

3.合肥学院化学与材料工程系,合肥,230022

4.合肥工业大学化学工程学院,合肥

5.合肥学院化学与材料工程系,合肥,230022

6.合肥学院化学与材料工程系,合肥,230022

基金项目: 合肥学院科研发展项目(08KY014ZR) 安徽省教育厅重点项目(KJ2007A125ZC) 合肥学院人才引进项目(RC018)

关键词： CaZr_(0.1)Ti_(0.9)O_3 , 溶胶-燃烧法 , 钙钛矿结构 , 电导率

Preparation and Electrical Property of Novel Electrolyte Material CaZr_(0.1)Ti_(0.9)O_3

Keywords： CaZr_(0.1) Ti_(0.9) O_3 , sol-combustion method , perovskite structure , electrical conductivity

采用溶胶-燃烧法合成了可用于固体氧化物燃料电池(SOFC)的新型固体电解质材料CaZr_(0.1)Ti_(0.9)O_3.通过XRD、交流复阻抗等电化学方法对样品的结构、电导性能进行了表征,并考察了材料的烧结性能. 结果表明,溶胶-燃烧法可以成功制备出具有良好烧结性能的CaZr_(0.1)Ti_(0.9)O_3电解质粉末,1 400 ℃下得到的烧结体的相对密度可达到95%. 电性能测试表明,CaZr_(0.1)Ti_(0.9)O_3烧结体在中温范围内具有较高的氧离子电导率(σ_(800 ℃)＝2.24×10~(-3)S/cm)、低的电导活化能(0.89 eV).

A novel electrolyte CaZr_(0.1)Ti_(0.9)O_3 for solid oxide fuel cell(SOFC) was synthesized by a newly sol-combustion method. The structure and conduction properties of the sample were systematically investigated via XRD and electrochemical methods. The results show that CaZr_(0.1)Ti_(0.9)O_3 powders were successfully prepared by the sol-combustion technique. The powder shows a high sinterability, and a relative density of 95% at a sintering temperature of 1 400 ℃. Electrochemistry measurements show that the CaZr_(0.1)Ti_(0.9)O_3 ceramics has a relatively high oxide ionic conductivity (σ_(800℃) = 2. 24 × 10~(-3) S/cm) , low electrical activation energy (E_a = 0. 89 eV) in the low-temperature range.

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