The researchers employed an all-solid-state hydrogen-terminated diamond (H-diamond)-based EDL transistor (EDLT) to conduct Hall measurements and pulse response measurements that determined EDL charging characteristics. Kazuya Terabe from National Institute for Materials Science in Japan, have devised a novel technique to quantitatively evaluate the EDL effect at the solid/solid electrolyte interface. Tohru Higuchi, Associate Professor at Tokyo University of Science (TUS) explained, “This occurs at the solid/solid electrolyte interface, posing a problem in all-solid-state lithium batteries.”ĭr. The EDL effect occurs when colloidal particles gain negative electric charge by adsorbing the negatively charged ions of the dispersion medium on their surface.ĭr. Researchers have alluded it to a phenomenon called the “electric double layer” (or EDL) effect seen in colloidal substances (which are microscopic dispersions of one kind of particle in another substance).
Moreover, the exact mechanism of this surface resistance has been so far, unknown. However, commercial application of these batteries is currently facing a bottleneck – their output is reduced owing to their high surface resistance. ASS-LIBs are expected to be used in a wide range of applications including electric vehicles (EVs). The search for clean energy and carbon neutrality, all-solid-state lithium-ion batteries (ASS-LIBs) offers considerable promise. The reporting paper detailing their technique was published in Volume 31 of Materials Today Physics. The achievement is carrier modulation and improved switching response speed control in these batteries. The researchers have employed a novel technique to investigate and modulate electric double layer dynamics at the solid/solid electrolyte interface.
Solid-state battery‘s high surface resistance causes these batteries to have low output, limiting their applications. Tokyo University of Science researchers demonstrated unprecedented control of response speed by over two orders of magnitude in a solid state battery. This is a major steppingstone towards realization of commercial all-solid-state batteries.
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