在对称的固体氧化物细胞中提高电化学性能,通过纳米工程利用溶解的纳米粒子进行氧稳定电极
Javier Zamudio-García1,2, Jose M Porras-Vázquez2, Enrique R Losilla2
1Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, Building 310, 2800 Kongens, Lyngby, Denmark.
ACS applied materials & interfaces
|December 25, 2023
概括
对称固体氧化物电池 (SSOCs) 电极的纳米结构定制显著提高了性能. 优化的 (La,Sr) FeO3-δ电极与Ni溶解实现了低极化阻力和高功率密度,以实现高效的能量转换.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 能源转换 能源转换
背景情况:
- 对称的固体氧化物电池 (SSOC) 为能量转换提供了简化配置和成本效益.
- 之前的研究主要集中在化矿电极上,往往忽视了微观结构优化.
- 开发高性能电极对于推进SSOC技术至关重要.
研究的目的:
- 探索 (La0.8Sr0.2) 0.95Fe1-xTixO3-δ (LSFTx) 电极的纳米结构定制,以提高SSOC的性能.
- 研究将LSFTx纳入Ce0.9Gd0.1O1.95 (CGO) 骨干或使用纳米复合材料架构的影响.
- 实施Ni-doping和微结构控制,以进一步改善燃料氧化和整体电池效率.
主要方法:
- 在LSFTx电极 (x = 0.2,0.4) 的纳米结构定制中使用单阶段喷雾-热解沉积.
- 使用与CGO多孔骨干或纳米复合材料架构集成的LSFTx电极制造SSOC.
- 在降解条件下实施Ni-doping和控制Ni纳米颗粒的排泄.
- 电化学表征包括极化电阻 (Rp) 测量和功率密度的确定.
主要成果:
- 与传统的丝网打印电极相比,LSFTx电极的纳米结构定制显著降低了极化电阻.
- 尼-兴奋剂和微结构优化导致了显着的RP值0.34 Ω cm2在空气中和0.11 Ω cm2在湿H2在700°C.
- 带有对称电极的电解质支持电池在800°C时实现了稳定的最大功率密度617 mW cm−2.
- 证明了组合组合和微观结构优化的有效性.
结论:
- 纳米结构控制是提高SSOC中矿基电极性能的一个关键因素.
- 与微结构优化相结合的Ni-exsolution策略为高效和持久的SSOC提供了一个有前途的途径.
- 这项工作为设计下一代能量转换设备的先进电极架构提供了基础.
相关概念视频
Voltaic/Galvanic Cells
57.3K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.3K
Electrolysis
26.4K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.4K
Batteries and Fuel Cells
27.4K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.4K


