open access

https://hdl.handle.net/2115/92849

Significant Reduction in the Switching Time of Solid-State Electrochemical Thermal Transistors

英語

SrCoO x

2023-07-24

American Chemical Society

ACS Applied Electronic Materials

5(8)

4233-4239

Thermal transistors have the remarkable ability to electrochemicallyswitch the thermal conductivity (& kappa;) of an active material. Severalthermal transistors have been reported to control heat flow, but theyare impractical because they use liquid electrolytes. Recently, werealized a solid-state thermal transistor that electrochemically controlsthe & kappa; of SrCoO x (2 & LE; x & LE; 3) using 0.5-mm-thick yttria-stabilized zirconia(YSZ) single crystal substrates as a solid electrolyte at 280 & DEG;C.The applicable electric current is low (50 & mu;A) due to the highelectrical resistivity of YSZ at 280 & DEG;C. Consequently, & kappa;switching is slow (& SIM;3 min). Herein, we aim to reduce the switchingtime by examining several SrCoO x -basedthermal transistors using YSZ substrates with varied thicknesses.The x in SrCoO x is controlledbetween 2 and 3, and the & kappa; switches between 0.97 and 3.86 Wm(-1) K-1. The overall electricalresistance decreases as the YSZ thickness decreases. For a 0.1-mm-thickYSZ substrate, the applicable current increases to 1 mA and the switchingtime is significantly reduced to & SIM;10 s.

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Accepted Manuscript

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Electronic Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/articlesonrequest/AOR-YWZZNTKVC3BVCJVFFS6X