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摘要

"Ultra-High Areal Number Density Solid-State On-Chip Microsupercapacitors via Electrohydrodynamic Jet Printing" Authors: Kwon-Hyung Lee, Seong-Sun Lee, et al. Abstract: Microsupercapacitors (MSCs) have gar-nered considerable attention as a promising power source for microelectronics and miniaturized portable/ wearable devices. However, their practical application has been hindered by the manufacturing complexity and dimensional limits. The authors developed a new class of ultra-high areal number density solid-state MSCs (UHD SS-MSCs) on a chip via electrohydrody-namic (EHD) jet printing. This is, to the best of their knowledge, the first study to exploit EHD jet printing in MSCs. The activated carbon-based electrode inks are EHD jet-printed, creating interdigitated electrodes with fine feature sizes. Subsequently, a drying-free, ultraviolet-cured solid-state gel electrolyte is intro-duced to ensure electrochemical isolation between the SS-MSCs, enabling dense SS-MSC integration with on-demand (in-series/in-parallel) cell connection on a chip. The resulting on-chip UHD SS-MSCs exhibit exceptional areal number density [36 unit cells inte-grated on a chip (area = 8.0mm × 8.2mm), 54.9 cells cm~(-2)] and areal operating voltage (65.9V cm~(-2)). (Sci-ence Advances, Mar. 6, 2020, advances.sciencemag. org/content/6/10/eaazl 692).