在离子混合电容器中识别活性碳电极衰老路径
Sylwia Slesinska1, Bénédicte Réty2,3,4, Camélia Matei-Ghimbeu2,3,4
1Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
概括
混合离子电容器中的碳电极根据电压通过不同的途径降解. 较高的电压加速衰老,导致由于碳材料的结构和化学变化而导致显著的性能损失.
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:
- 混合离子电容器 (HLIC) 是一个有前途的储能设备.
- 了解碳电极老化对于改善HLIC寿命至关重要.
- 电解质分解和碳氧化有助于性能降低.
研究的目的:
- 在恒定的极化条件下研究HLIC中碳衰老机制.
- 为了确定导致能量衰减的结构和化学变化.
- 为了将衰老路径与HLICs中的应用电压相关联.
主要方法:
- 在各种电压下,碳电极的恒定极化 (浮动).
- 使用补充技术进行尸体解剖分析.
- 研究碳材料的结构和化学变化.
主要成果:
- 在中等电压下观察到电容性损失和电阻增加,与表面积减少和毛孔堵塞有关.
- 在高电压下,进一步的碳氧化,/乙烯基组的形成和电解质分解加速了降解.
- 减少的碳导电性和改变的纹理特性显著影响HLIC性能.
结论:
- 应用电压决定了HLIC中的碳衰老路径.
- 电解质和碳降解产品是性能衰退的关键因素.
- 缓解碳氧化和导电性损失对于提高HLIC耐用性至关重要.
更多相关视频
相关概念视频
MOS Capacitor
680
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...
680
Batteries and Fuel Cells
26.9K
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...
26.9K


