用铁添加的SDC固体溶液作为低至中温固体氧化物燃料电池的电解质
Lijie Zhang1, Yunan Jiang1,2, Kang Zhu1
1CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, Anhui, China.
ACS applied materials & interfaces
|January 19, 2024
概括
铁兴奋剂增强了固体氧化物燃料电池 (SOFC) 的萨马里亚兴奋剂 (SDC). 这种Fe-doped SDC电解质在低温下提高了可烧结性,导电性和单细胞性能.
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:
- 撒玛利亚化 (SDC) 是低至中温固体氧化物燃料电池 (SOFC) 的有前途的电解质.
- 提高SDC的可烧结性和离子导电性对于提高SOFC性能至关重要.
- 铁 (Fe) 被探索为一种潜在的烧结辅助剂和剂,以修改SDC属性.
研究的目的:
- 在SDC中调查铁兴奋剂的溶解度和影响.
- 评估铁剂对SDC电解质的烧结特性,热膨胀和电导率的影响.
- 为了评估Fe-doped SDC作为单个SOFC设备中的电解质的性能.
主要方法:
- 用铁添加的SDC固体溶液的合成.
- 材料性质的表征,包括可溶性,烧结行为,热膨胀和电导率.
- 单个SOFC的制造和测试,使用合的SDC电解质.
主要成果:
- 发现Fe在SDC中溶解,形成固体溶液,其溶解度取决于烧结温度.
- 铁注显著改善了电解质特性,包括增强的烧结,修改的热膨胀和增加的电导率.
- 电导率增加,而激活能量降低了Fe doping.
- 用Fe-doped SDC电解质的单个电池在600°C时,峰值功率密度增加了52.8%,达到0.726W cm−2.
- 在600°C和0.3 A cm−2下,经过150小时的稳定运行证明了这一点.
结论:
- 合铁的SDC形成了一个有前途的固体溶液电解质,用于低至中温的SOFC.
- 铁剂有效地增强了关键的电解质特性,并提高了SOFC的性能.
- 经过证明的稳定运行突显了化SDC在实际SOFC应用中的潜力.
相关概念视频
04:02Weak Acid Solutions
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
03:45Formation of Complex Ions
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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...
03:00Electrolysis
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...
01:08Sample Preparation for Analysis: Advanced Techniques
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...