通过La-Doped CeO2-δ的额外作用来提高电化学性能,在高电流SOFC操作中为"氧气提供者"的中间层
Xuan Dong Nguyen1,2, Sang Won Lee1, Su Ji Kim1
1Korea Institute of Ceramic Engineering and Technology (KICET), Gyongsangnam-do, Jinju-Si, 52851, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 27, 2024
概括
添加兰的Ceria (LDC) 通过作为缓冲层来提高固体氧化物燃料电池 (SOFC) 的性能. 降低烧结温度可以防止杂质,在800°C时将功率密度提高到2.15W cm−2.
科学领域:
- 材料科学与工程 材料科学与工程
- 电化学 电化学 电化学
- 陶工程 陶工程
背景情况:
- 稀土合的ceria提高了固体氧化物细胞 (SOC) 的耐用性和活性.
- 加多化 (GDC) 通常用于固体氧化物燃料电池 (SOFC) 作为屏障层和催化剂.
- 添加兰的Ceria (LDC) 具有提高电化学设备性能的潜力.
研究的目的:
- 调查使用La-doped CeO2 (LDC) 作为SOFC中的功能中间层.
- 通过控制烧结温度来防止La2Zr2O7杂质的形成.
- 为了提高阳极支持的SOFC的电化学性能和耐用性.
主要方法:
- 合成的Lad-doped CeO2 (LDC) 在Ce位点具有较高的La替代.
- 采用LDC缓冲层的制造式阳极支持的SOFC.
- 优化LDC烧结温度以避免杂质的形成.
- 评估电化学性能,包括最大功率密度 (MPD).
主要成果:
- 在较低的烧结温度下LDC中间层的形成成功地防止了La2Zr2O7杂质.
- 在LDC中高La3+替代改善了氧气非静脉测量.
- 在高电流运行期间,LDC在氧气供应商容量方面发挥了额外的作用.
- 优化的LDC缓冲层导致800°C的最大功率密度约为2.15 W cm−2.
结论:
- 添加兰的是提高SOFC性能的有效缓冲层.
- 控制烧结温度对于防止杂质形成和最大限度地提高LDC效益至关重要.
- 优化的LDC中间层显著提高了SOFCs的电化学活性和功率密度.
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