相关实验视频
Updated: Jul 15, 2026
15:08
Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
Published on: September 20, 2012
16.0K
作为中温固体氧化物燃料电池的阴极材料的Ca-doping无双氧化物
Liangmei Xue1, Songbo Li1, Shengli An2
1School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Molecules (Basel, Switzerland)
|July 13, 2024
概括
兴奋剂增强了固体氧化物燃料电池 (SOFC) 的铁基双矿阴极. 这提高了氧离子和电子导电性,提高了电化学性能和功率密度,以实现高效的低温运行.
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:
- 混合离子电子导体材料对于高效的固体氧化物燃料电池 (SOFC) 阴极至关重要,可在较低的温度下工作.
- 基于铁的双矿氧化物通常由于有限的氧离子和电子导电性而缺乏足够的电催化活性.
研究的目的:
- 提高PrBaFe2O5+δ (PBF) 的电化学性能,通过在A位点用 (Ca) 进行注.
- 为了研究Ca兴奋剂对晶体结构的影响,氧吸附和矿材料的离子扩散动力学.
主要方法:
- 合成化PrBaFe2O5+δ (PCBF) 的材料.
- 使用对称和阳极支持的单一SOFC配置,对晶体结构和电化学性能进行表征.
- 在800°C评估极化阻力和功率密度.
主要成果:
- 胺没有改变PrBaFe2O5+δ的晶体结构.
- 胺显著增加了吸附氧含量,加速了O2的迁移和扩散.
- 与PBF相比,PC0.15BF的极化电阻降低了56%,峰值功率密度达到512mW·cm-2.
结论:
- 兴奋剂有效地改善了PrBaFe2O5+δ的混合离子电子导电性.
- 增强的材料表现出优越的电化学性能,使其成为SOFCs的一个有希望的阴极材料.
- 这项研究强调了Ca-doped PBF作为高效的低温和中温SOFC操作的可行选择.
相关概念视频
03:12Batteries and Fuel Cells
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...
01:24Types of Reversible Electrodes
For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...