作为离子混合电容器的双功能阴极和阳极材料的多功能瓦纳酸 (KVPO4F) 复合材料
Jiazhen Cai1, Yifang Ding2, Ruijun Bai1
1Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
Journal of colloid and interface science
|August 10, 2023
概括
研究人员开发了用于先进的能量存储的多功能瓦酸 (KVPO4F) 复合材料. 这些材料使稳定的离子混合电容器 (PIHC) 和具有高能量密度和长周期寿命的微电容器成为可能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于的储能是有前途的,因为的丰富性和电化学性质.
- 混合电容器结合了电池和超级电容器的优势,以有效地储存能量.
- 开发多功能电极材料对于推进离子技术至关重要.
研究的目的:
- 开发用于储能的新型,,酸 (KVPO4F) 复合材料.
- 研究KVPO4F复合材料作为阳极和阴极材料的性能.
- 制造和描述离子混合电容器 (PIHC) 和微电容器.
主要方法:
- 用Sol-gel方法合成KVPO4F复合材料,其中包括层次性多孔碳 (HPC) 和活性碳 (AC).
- 在低压窗口和高压窗口中对阳极和阴极复合材料进行电化学测试.
- 制造和评估PIHCs和离子微混合电容器 (PIMHCs) 的数字化电极.
主要成果:
- 阳极复合材料 (KVPO4F/HPC) 在400个循环中显示出极好的稳定性.
- 阴极复合材料 (KVPO4F/AC) 显示了特定能量和周期寿命的平衡.
- 在0.5-4.3V窗口内,PIHC在10,000个循环后实现了83%的容量保留.
- PIMHCs在111.6μW cm-2.2的功率密度下表现出高的面积能量密度 (18.8μWh cm-2).
结论:
- KVPO4F复合材料适用于基储能中的阳极和阴极应用.
- 开发的PIHC和PIMHC显示了高效和紧的储能解决方案的巨大潜力.
- 这项工作强调了KVPO4F复合材料对离子储能技术未来进步的有效性.
相关概念视频
MOS Capacitor
839
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...
839
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
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
Batteries and Fuel Cells
27.6K
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...
27.6K
Capacitors
461
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...
461
Series and Parallel Capacitors
4.8K
Capacitors, fundamental components in electronic circuits, can be connected in series and/or parallel configurations. Each configuration has different impacts on the overall behavior of the circuit.
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
4.8K


