Issue 1, 2023

Microbatteries with twin-Swiss-rolls redefine performance limits in the sub-square millimeter range

Abstract

To maintain the downscaling of microelectronic devices with footprints less than one square millimeter, next-generation microbatteries should occupy the same area and deliver adequate energy for running a new generation of multi-functional microautonomous systems. However, the current microbattery technology fails in accomplishing this task because the micrometer-sized electrodes are not compatible with on-chip integration protocols and technologies. To tackle this critical challenge, an on-chip Swiss-roll microelectrode architecture is employed that exploits the self-assembly of thin films into ultra-compact device architectures. A twin-Swiss-roll microelectrode on a chip occupies a footprint of 0.045 mm2 and delivers an energy density up to 458 μW h cm−2. After packaging, the footprint of a full cell increases to 0.11 mm2 with a high energy density of 181 μW h cm−2. The volumetric energy density excluding the chip thickness is 16.3 mW h cm−3. These results open opportunities for deploying microbatteries as energy and power sources to drive smart dust microelectronics and microautonomous systems.

Graphical abstract: Microbatteries with twin-Swiss-rolls redefine performance limits in the sub-square millimeter range

Supplementary files

Article information

Article type
Communication
Submitted
07 okt 2022
Accepted
03 noy 2022
First published
22 noy 2022

Nanoscale Horiz., 2023,8, 127-132

Microbatteries with twin-Swiss-rolls redefine performance limits in the sub-square millimeter range

Y. Li, M. Zhu, D. D. Karnaushenko, F. Li, J. Qu, J. Wang, P. Zhang, L. Liu, R. Ravishankar, V. K. Bandari, H. Tang, Z. Qu, F. Zhu, Q. Weng and O. G. Schmidt, Nanoscale Horiz., 2023, 8, 127 DOI: 10.1039/D2NH00472K

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