快速间歇氧气导体的计算发现
Jun Meng1, Md Sariful Sheikh1, Ryan Jacobs1
1Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, USA.
Nature materials
|June 13, 2024
概括
新的间位氧导体,如La4Mn5Si4O22+δ,为能源技术提供了增强的氧离子传输. 这一发现使得在较低的温度下能提供高效的性能,超越了当前的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 能源技术 能源技术
背景情况:
- 高效的氧离子传输对于先进的能源技术至关重要,特别是在较低的温度下 (<400°C).
- 间歇性氧气导体具有高性能潜力,但比空隙介导体更少被探索.
- 开发新的间歇性氧导体需要有效的发现策略.
研究的目的:
- 开发一种强大的方法来发现新的快速间位氧导体.
- 识别具有独特结构性质的间隙氧导体的新型家族.
- 研究合成材料的氧气动力学和能源应用的潜力.
主要方法:
- 使用物理动机的结构和属性描述符与ab initio模拟相结合.
- 采用了实验合成和表征技术.
- 在La4Mn5Si4O22+δ中研究了氧气动力学,La4Mn5Si4O22+δ是一种岩/切夫金岩家族成员.
主要成果:
- 发现了多个具有独特结构的间歇性氧气导体的新家族.
- 合成和表征了La4Mn5Si4O22+δ,与伊特里亚稳定相比,它显示出更高的氧离子导电性.
- 观察到高表面氧气交换率,并确定了同时间歇性和间歇性扩散通路.
结论:
- 提出电子可用性和结构灵活性是有效的间位氧导体的关键特征.
- 开发的方法为发现和理解新的间歇性氧导体提供了一个强大的框架.
- 拉4Mn5Si4O22+δ对中温能源应用具有有前途的性能.
更多相关视频
相关概念视频
Electrical Conductivity
In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
Interfacial Electrochemical Methods: Overview
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Oxygen Transport in the Blood
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...


