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Separator with high ionic conductivity enables electrochemical capacitors to line-filter at high power

文献类型：期刊论文

作者Hu, Yajie1; Li, Puying1; Lai GB(赖国彬)2,3; Lu, Bing1; Wang, Haiyan1; Cheng, Huhu1; Wu, Mingmao2; Liu F(刘峰)3; Dang, ZhiMin1; Qu, Liangti1
刊名NATURE COMMUNICATIONS
出版日期2025-03-01
卷号16期号:1页码:1-11
关键词Electrochemistry Electronic devices Mechanical and structural properties and devices
ISSN号2041-1723
DOI10.1038/s41467-025-58064-2
英文摘要Line-filtering electrochemical capacitors (LFECs) are demonstrating advantages in line filtering over traditional electrolytic capacitors. However, they can only function at no-load or low-power conditions due to the limited high-frequency capacitance resulting from the excessive ionic resistance, despite much progress in electrode materials. Here, we show separators dominate both ion migration and capacitance in LFECs. A 3 mu m-thick thread-anchor structured separator is developed, featuring both accelerated ionic transport and reliability, leading to a low ionic resistance of 25 m Omega cm2. With a phase angle of -80 degrees at 120 Hz, the assembled device has an areal capacitance of 6.6 mF cm-2. Furthermore, stack integration in parallel breaks the trade-off between capacitance and frequency response, boosting the areal capacitance by two orders of magnitude without decay of frequency characteristics. The On-board field test demonstrates that voltage ripples are steadily suppressed below 5% even for practical high-power line filtering with a load power density of 2.5 W cm-2, three orders of magnitude higher than previous instances. This work opens up a perspective of separator engineering for the development of high-performance line-filtering electrochemical capacitors and promotes their applications in practical high-power scenarios.
分类号一类
WOS研究方向Multidisciplinary Sciences ; Science & Technology - Other Topics
语种英语
WOS记录号WOS:001449678800013
资助机构This work was supported by the National Key R&D Program of China (2024YFB4609100, 2024YFF0506000 to L.Q.), National Natural Science Foundation of China (22035005 to L.Q., 223B2903 to Y.H., 52090032 to H.C., 11972349 to F.L., 11790292 to F.L., 22105040 to M.W.), Strategic Priority Research Program of the Chinese Academy of Sciences (XDB22040503 to F.L.), Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China (2021ZZ127 to M.W.), Natural Science Foundation of Fujian Province of China (2021J01588 to M.W.).
其他责任者Qu, Liangti
源URL[http://dspace.imech.ac.cn/handle/311007/101464]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Tsinghua University;
2.Fuzhou University;
3.Institute of Mechanics, CAS;
4.Tsinghua University
推荐引用方式
GB/T 7714		 Hu, Yajie,Li, Puying,Lai GB,et al. Separator with high ionic conductivity enables electrochemical capacitors to line-filter at high power[J]. NATURE COMMUNICATIONS,2025,16(1):1-11.
APA Hu, Yajie.,Li, Puying.,赖国彬.,Lu, Bing.,Wang, Haiyan.,...&Qu, Liangti.(2025).Separator with high ionic conductivity enables electrochemical capacitors to line-filter at high power.NATURE COMMUNICATIONS,16(1),1-11.
MLA Hu, Yajie,et al."Separator with high ionic conductivity enables electrochemical capacitors to line-filter at high power".NATURE COMMUNICATIONS 16.1(2025):1-11.

入库方式： OAI收割

来源：力学研究所

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