提高混合电容器非水性质子电解质的离子导电性
Mochou Liao1, Yuxiao Lin2, Yunsong Li3
1Department of Chemistry, Department of Materials Science, College of Smart Materials and Future Energy, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, China.
Angewandte Chemie (International ed. in English)
|September 30, 2025
概括
研究人员开发了一种用于质子电池的新型非水性电解质,克服了传统水性系统的局限性. 这一进步使得稳定,高性能的能量存储在广泛的温度范围内.
科学领域:
- 储能 储能 储能 储能 储能 储能
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 质子电池提供可持续的能量储存与快速的离子运输.
- 水性电解质限制了质子电池,这是由于的进化和狭窄的电化学窗口.
- 非水性电解质面临着低离子导电性的挑战.
研究的目的:
- 为了研究非水性电解质中键介导的质子运输.
- 为质子电池开发一种稳定,高性能的非水性电解质.
- 为了增强质子能储能装置的电化学性能和运行范围.
主要方法:
- 使用的酸/乙烯酸 (H3PO4/EA) 混合物,度不同.
- 具有电解质的电离导电性,电化学稳定性和腐蚀性.
- 使用优化的电解质制造并测试了一种MoO3//AC混合电容器.
主要成果:
- 发现了一种键介导的质子运输机制.
- 优化的H3PO4/EA电解质 (80 m) 呈现出高离子导电性 (21.8 mS cm-1) 和2.5 V电化学稳定性窗口.
- 该MoO3//AC电容器显示了超高功率密度 (13292 W kg-1) 和稳定的循环超过10,000个周期.
- 已证明具有广泛的操作温度适应性,电解质的温度为 -50至60°C,电解质为 -80至200°C.
结论:
- 非水性电解质可以克服质子电池水性系统的局限性.
- 开发的H3PO4/EA电解质提供了卓越的性能和稳定性.
- 这项研究提供了对非水性质子传导和先进能量存储的设计原则的见解.
相关概念视频
Capacitor With A Dielectric
4.8K
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...
4.8K
Dielectric Polarization in a Capacitor
5.9K
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...
5.9K
MOS Capacitor
1.5K
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...
1.5K
Capacitors
871
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...
871
Batteries and Fuel Cells
30.7K
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...
30.7K
Electrolyte and Nonelectrolyte Solutions
71.1K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
71.1K


