4.6 Article

Microsphere structure application for supercapacitor in situ temperature monitoring

Journal

SMART MATERIALS AND STRUCTURES
Volume 30, Issue 10, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-665X/ac221b

Keywords

fiber-optic microstructure; fiber-optic microsphere; supercapacitor; fiber-optic sensor; temperature monitoring

Funding

  1. Gdansk University of Technology under the Technetium-EIRU program [8/2020/IDUB/III.4.1/Tc]
  2. Polish National Agency for Academic Exchange-NAWA under bilateral exchange of scientists between France and Poland PHC Polonium [PPN/BFR/2019/1/00005]
  3. DS Programs of the Faculty of Electronics, Telecommunications and Informatics of the Gdansk University of Technology

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The study presents the use of a fiber-optic microstructure with thin zinc oxide coating as a temperature sensor for supercapacitors. The sensor, built with standard optical telecommunication fibers, can measure temperatures ranging from 30 degrees C to 90 degrees C with a resolution of 5 degrees C. The sensitivity of temperature measurement is approximately 109.6 nW degrees C-1, and the sensor's fitting achieved a correlation coefficient R (2) = 0.97.
Constant, real-time temperature monitoring of the supercapacitors for efficient energy usage is in high demand and seems to be crucial for further development of those elements. A fiber-optic sensor can be an effective optoelectronic device dedicated for in-situ temperature monitoring of supercapacitors. In this work, the application of the fiber-optic microstrucutre with thin zinc oxide (ZnO) coating fabricated in the atomic layer deposition process applied as a temperature sensor is reported. Such a structure was integrated with supercapacitors and used for the temperature measurements. Described sensors are built with the utility of the standard optical telecommunication fibers. The inner temperature of the supercapacitor was investigated in the range extending from 30 degrees C to 90 degrees C with a resolution equal to 5 degrees C. The sensitivity of temperature measurement is about 109.6 nW degrees C-1. The fitting of the sensor was achieved with a correlation coefficient R (2) = 0.97.

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