期刊
IEEE ELECTRON DEVICE LETTERS
卷 44, 期 10, 页码 1688-1691出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2023.3307028
关键词
Planar microsupercapacitors; conformal active-material loading strategy; laser-induced stereoscopic carbon electrodes; layered double hydroxide
This study presents a conformal active-material loading strategy using laser-induced graphene (LIG-O) electrodes for high-performance planar microsupercapacitors (MSCs). The planar MSCs showed a 10-fold improvement in areal capacitances and functioned as energy storage devices for a flexible ink display system.
Microsupercapacitors (MSCs) show promise for use in wearable electronics for biomedical, consumer, and military applications. However, the development of innovative engineering technologies that enable high-capacity loading of active materials on the MSCs is still challenging. In this work, we report a conformal active-material loading strategy for developing high-performance planar MSCs based on stereoscopic carbon electrodes produced via direct laser writing (DLW). Oxidized laser-induced graphene (LIG-O) was prepared by combining laser-induced pyrolysis of polyimide (PI) and oxygen plasma-induced oxidation. The resultant LIG-O electrodes showed well-defined micropatterns, protuberant stereoscopic structures, high porosities, and superhydrophilicity. The combined effects enabled high-capacity loading of active materials (e.g., NiFe layered double hydroxide) on the stereoscopic carbon electrodes in a conformal manner, which contributed to a 10-fold improvement in the areal capacitances of the planar MSCs. In addition, the resultant flexible planar MSCs served as energy storage devices to power a flexible ink display system. This work will open new avenues for developing high-performance planar MSCs.
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