对于奥里维利乌斯相黄酸的电化学行为呢? 电容或伪电容的电容或伪电容
Jian-Fei Gao1,2, Jing-Feng Hou1,2, Ling-Bin Kong1,2
1State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, P. R. China. konglb@lut.edu.cn.
Physical chemistry chemical physics : PCCP
|June 7, 2023
概括
石酸 (Bi2WO6) 具有理想的伪电容性行为,非常适合用于储能应用. 这种Aurivillius相材料提供了高体积容量和表面主导的工艺,指导了未来的伪容量材料开发.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 伪电容对于储能至关重要,通常通过法拉第伪电容材料进行研究.
- 了解理想的伪电容性行为是开发先进电极材料的关键.
研究的目的:
- 为了研究Bi2WO6,一个Aurivillius相物质的伪容量性质.
- 确定Bi2WO6是否表现出理想的伪容量行为,并评估其储能潜力.
主要方法:
- 进行了循环电压测量和静电电荷放电测量.
- 动力分析被用来理解电化学过程.
- 评估了体积特异电容.
主要成果:
- Bi2WO6显示了几乎理想的伪容量行为,具有矩形循环电压测量和三角形电荷-放电曲线.
- 电化学过程被发现是表面主导的,而不是扩散控制的.
- 在0.5 A g-1下,达到466.5 F cm-3的高体积特异容量.
结论:
- Bi2WO6作为探索伪容量储能的优秀材料.
- 这些发现为设计新型伪电容电极材料提供了宝贵的见解.
相关概念视频
MOS Capacitor
860
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
860
Dielectric Polarization in a Capacitor
4.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.8K
Capacitors
462
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
462
Capacitor With A Dielectric
4.0K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.0K
Capacitors and Capacitance
7.7K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
7.7K
Energy Stored in Capacitors
546
A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
546


