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Article

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Title

Analysis of thermal and electrochemical properties of electrical double-layer capacitors by using an in-situ simultaneous thermal analysis cell

Authors

[ 1 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ SzD ] doctoral school student | [ P ] employee

Scientific discipline (Law 2.0)

[7.6] Chemical sciences

Year of publication

2023

Published in

Electrochimica Acta

Journal year: 2023 | Journal volume: vol. 444

Article type

scientific article

Publication language

english

Keywords
EN
  • In-situ STA
  • Thermal investigation
  • Heat flow
  • EDLC
  • Aging
  • Silica-templated carbon
Abstract

EN In this work, the impact of temperature and voltage on aging of electrical double-layer capacitors (EDLCs) made with a model silica-templated carbon has been investigated by using an in-situ simultaneous thermal analysis (STA) cell. We show that the use of such a cell allows the electrochemical performance of EDLCs and the heat generation occurring within these devices to be simultaneously measured. In EDLCs containing adiponitrile (ADN) based electrolytes, the combination of high voltage (≥ 3.5 V) and elevated temperature of 60 ◦C leads not only to a fast decrease in capacitance retention, but also to important degradation processes causing a significant increase of heat flow within the system. For a temperature of 60 ◦C, the heat flow at 3.75 V is about 6.5 times higher than in an EDLC operating at 3.0 V. The correlation of the heat flow and electrochemical properties provides a helpful insight into the stability of EDLCs, and thus the in-situ STA cell appears as an interesting and novel tool for the investigation of these systems.

Date of online publication

31.01.2023

Pages (from - to)

141974-1 - 141974-7

DOI

10.1016/j.electacta.2023.141974

URL

https://www.sciencedirect.com/science/article/pii/S0013468623001615?via%3Dihub

Comments

Article number: 141974

License type

CC BY (attribution alone)

Open Access Mode

czasopismo hybrydowe

Open Access Text Version

final published version

Release date

31.01.2023

Date of Open Access to the publication

at the time of publication

Full text of article

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Access level to full text

public

Ministry points / journal

100

Impact Factor

6,6 [List 2022]

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