在BaZrTi1-O3无铁电器中提高了能量储存性能,接近相位转换
Ba-Hieu Vu1, Ha Thi Dang1,2, Van-Hai Dinh1
1School of Materials Science and Engineering, Hanoi University of Science and Technology, No. 1, Dai Co Viet Street, Hanoi 100000, Vietnam.
Journal of physics. Condensed matter : an Institute of Physics journal
|November 13, 2024
概括
本研究使用相场建模来研究用于储能的BaZrTi1-xO3. 高排放能量密度在克里温度附近实现,优化材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算材料科学科学 计算材料科学
背景情况:
- 铁电材料对于储能应用至关重要.
- 了解BaZrTi1-xO3的相位行为是优化其能量存储容量的关键.
- 构成和温度显著影响矿材料的介电和铁电特性.
研究的目的:
- 使用相场建模探索BaZrTi1-xO3的储能特性.
- 研究成分 (Zr含量) 和温度对材料极化行为和能量存储性能的影响.
- 为BaZrTi1-xO3建立一个全面的相位图和储能性能图.
主要方法:
- 使用相场建模来模拟BaZrTi1-xO3的行为.
- 对各种成分和温度计算了极化电场 (P-E) 响应.
- 储能特性,包括放电能量密度,是从P-E反应中得出的.
主要成果:
- 为BaZrTi1-xO3建立了一个详细的温度组成相位图,显示了与实验数据的良好一致.
- 在Zr含量和温度的变化显著影响PE反应和储能能力.
- 在克里温度附近观察到高放电能量密度,与铁电到电相位过渡相关.
结论:
- 阶段场建模是预测BaZrTi1-xO3的能量储存特性的一个有效工具.
- 优化Zr组成和在库里点附近的操作温度可以最大限度地提高放电能量密度.
- 最大极化和剩余极化之间的差异,以及有效的电容性,是高能储能性能的关键因素.
更多相关视频
10:40A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.2K
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
25.4K
相关概念视频
01:18Fermi Level
504
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
504
02:54Trends in Lattice Energy: Ion Size and Charge
23.7K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.7K
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
01:12Fermi Level Dynamics
225
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
225