Processing and performance of solid oxide fuel cell with Gd-doped ceria electrolyte
Processing and performance of solid oxide fuel cell with Gd-doped ceria electrolyte
复制标题
Gd掺杂二氧化铈电解质固体氧化物燃料电池的制备及性能
DOI：
10.1016/j.jeurceramsoc.2011.01.020
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发表时间：
2011
影响因子：
5.7
通讯作者：
N. Matsunaga
中科院分区：
文献类型：
--
作者：
Yuta Ibusuki;Hajime Kunigo;Y. Hirata;S. Sameshima;N. Matsunaga
在792- 1095 K温度范围内，以（La0.8Sr0.2）（Co0.8Fe0.2）O3为阴极，以含3vol%H2O的H2为燃料，对60μm厚的Gd掺杂CeO 2（Ni-GDC）阳极支撑的GDC薄膜进行了燃料电池性能测试。在1095 K时获得最大功率密度436 mW/cm ~ 2。在773- 1073 K、10 - 15- 100 Pa氧分压（Po 2）的N2气氛中，GDC电解质的电导率与Po 2无关，这表明氧离子的扩散。在H2O/H2气氛中，GDC的电导率增加是由于GDC中氢的离解（H2→ 2 H ++2e−）进一步形成电子。在873 K，Po_2 =100- 104 Pa下观察到空穴电导。提高功率密度的关键因素是提高开路电压和抑制H2燃料在GDC电解液中的溶解。这些由阴极材料和Gd掺杂剂组成控制。
Fuel Cell performance was measured at 792–1095K for Ni-GDC (Gd-doped ceria) anode-supported GDC film (60μm thickness) with a (La0.8Sr0.2)(Co0.8Fe0.2)O3cathode using H2fuel containing 3 vol% H2O. A maximum power density, 436mW/cm2, was obtained at 1095K. The electrical conductivity of GDC electrolyte in N2atmosphere of 10−15–100Pa oxygen partial pressures (Po2) at 773–1073K was independent of Po2, which indicated the diffusion of oxide ions. The conductivity of GDC in H2O/H2atmosphere increased because of the further formation of electrons due to the dissociation of hydrogen in GDC (H2→2H++2e−). The hole conductivity was observed at 873K in Po2=100–104Pa. The key factors in increasing power density are the increase of open circuit voltage and the suppression of H2fuel dissolution in GDC electrolyte. These are controlled by the cathode material and Gd-dopant composition.