灵活的低温离子混合电容器,具有基于Fe-MnO2电极的超长周期寿命
Ke Zhang1, Yafeng Bai1, Liying Wang1,2
1Key Laboratory of Advanced Structural Materials, Ministry of Education and School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China.
Langmuir : the ACS journal of surfaces and colloids
|December 2, 2024
概括
这项研究介绍了一种灵活的固态离子混合电容器,具有增强的性能. 新的设计提供了更好的稳定性和能量储存,即使在低温下,为先进的能源设备铺平了道路.
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:
- 离子混合电容器 (ZIHCs) 显示出下一代能源存储的希望,因为其类似电池的性能和成本效益.
- 由于结构变形和循环稳定性差,ZIHCs的实际应用受到阻碍.
研究的目的:
- 开发一款灵活的固态离子混合电容器,具有改进的机械性能和电化学性能.
- 解决当前ZIHC在稳定性和循环能力方面的局限性.
主要方法:
- 使用活性炭 (AC) 阳极和Fe3+合MnO2 (Fe-MnO2) 阴极制造一个灵活的固态ZIHC.
- 开发一种由PVA,CMC和EG组成的凝电解质,以提高机械和离子性能,包括低温性能.
- 电化学特性包括特定电容,曲时的稳定性和在-20°C下循环性能.
主要成果:
- 灵活的ZIHC在2 mA cm-2.2时实现了848.8 mF cm-2的高特异电容.
- 该设备在曲测试中表现出极好的机械稳定性.
- 在15000个循环后观察到93.75%的显著循环保留,即使在-20°C.
结论:
- 开发的柔性固态ZIHC表现出优越的特定电容,机械灵活性和循环稳定性.
- 在MnO2中加入Fe3+兴奋剂和优化的凝电解质有助于提高电化学性能,特别是在低温下.
- 这种进步为灵活的储能应用提供了巨大的潜力.
相关概念视频
01:25MOS Capacitor
707
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...
707
03:12Batteries and Fuel Cells
27.0K
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...
27.0K