超级电容器的收费机制的新视角
Alexander C Forse1, Céline Merlet1, John M Griffin1,2
1Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K.
Journal of the American Chemical Society
|April 1, 2016
概括
超级电容器通过电极接口的离子相互作用来储存能量. 新的研究揭示了充电机制涉及离子交换,而不仅仅是吸附,
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 超级电容器 (电动双层电容器) 是电动汽车和电子设备至关重要的高功率储能装置.
- 目前的超级电容器在没有损害充电速度的情况下面临储能能力的限制.
- 在现场表征和计算建模方面的进步是理解和改进超级电容性能的关键.
研究的目的:
- 通过整合实验和计算结果,提供超级电容器充电机制的全面概述.
- 阐明在超级电容器中控制电荷储存的分子机制.
- 确定设计下一代超级电容器的新研究方向,以提高储能能力.
主要方法:
- 使用核磁共振 (NMR) 实验研究电极孔中的离子行为.
- 使用分子动力学 (MD) 模拟来建模离子相互作用和电荷储存机制.
- 综合了各种实验和计算研究的结果,以呈现充电过程的统一图像.
主要成果:
- 即使没有应用电位,电极孔中也会有大量的离子.
- 超级电容器充电主要涉及离子交换 (共离子/对离子交换),而不是仅仅对离子吸附.
- 一个新的充电机制参数量化了该过程,显示了对电极极化,电解质和电极材料的依赖.
结论:
- 超级电容充电的传统观点需要修订,以包括离子交换作为主要机制.
- 了解和控制充电机制对于开发高性能超级电容器至关重要.
- 需要进一步的研究,以将充电机制与设备性能联系起来,以实现未来的储能创新.
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