Three-dimensional microsupercapacitors based on interdigitated patterns of interconnected nanowire networks
(2019) Energy Storage Materials — n° 21, p. 77-84 (2019)
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- There is a proliferation of autonomous microscale devices, which are increasingly in need of power sources of commensurate form factors. The trade-off between the areal energy and power capabilities of miniature energy storage devices restrict their abilities to meet the requirements of these microscale devices. Three-dimensional micro- and nanoarchitectures, however, have the potential to meet the energy requirements of autonomous microscale devices, while retaining the power capabilities of thin-film systems. In this paper, we present a novel full-cell architecture and fabrication strategy for 3D microscale energy storage devices based on template-assisted electrodeposition of three-dimensionally interconnected metallic nanowire network, and subsequent laser-patterning of the deposited nanowire network to form interdigitated electrodes. The patterned nanowire networks are functionalized with the polyaniline active electrode material via an electroless deposition procedure. We show that a footprint areal capacitance/energy enhancement of more than 5 times is achieved by just 10μm-high nanowire networks, in addition to enhanced power capabilities.
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Omale, J., Rupp, R., Van Velthem, P., Van Kerckhoven, V., Antohe, V., Vlad, A., & Piraux, L. (2019). Three-dimensional microsupercapacitors based on interdigitated patterns of interconnected nanowire networks. Energy Storage Materials, 21, 77-84. https://doi.org/10.1016/j.ensm.2019.05.025 (Original work published 2019)