Scientists uncover critical changes in the thermal homes of energy storage gadgets during operation, paving the way towards much better thermal management.
Adopting a well-informed thermal management method is needed for the steady and safe operation of gadgets. To do this, it is required to comprehend how particular thermal residential or commercial properties, like heat capability (Cp), dynamically change during charging and releasing.
Recently, researchers from the Gwangju Institute of Science and Technology (GIST) investigated the thermal properties of electrical double-layer capacitors (EDLCs)– a type of supercapacitor having high power and long life– for a technical structure in thermal measurement and exposed substantial information. “Using the 3ω hot-wire approach, we had the ability to measure the change in heat capacity of EDLCs in real-time in a microscopic electrode-electrolyte volume, which is an active website for the adsorption and desorption of ions,” discusses Prof. Jae Hun Seol, who led the research study.
The research study was provided online on February 5, 2022, and will be published in Volume 188, Issue 122632 of International Journal of Heat and Mass Transfer on June 1, 2022.
Effectively managing the thermal properties of energy storage devices is the crucial to preventing thermal runaway and ensuring safety. Recently, scientists from the Gwangju Institute of Science and Technology revealed crucial changes to the thermal residential or commercial properties of electric double-layer capacitors during charging and releasing, which will help notify future thermal management techniques. Credit: Gwangju Institute of Science and Technology (GIST).
The research study team carried out experiments both in situ (under fixed conditions) and operando (during charging). They discovered that the temperatures of the unfavorable and positive electrodes altered by 0.92% and 0.42% during charging, which represented 9.14% and 3.91% decreases in their respective Cp. “According to thermodynamic theory, the ionic configuration entropy (a procedure of randomness) of a system reduces throughout adsorption, i.e., charging. This likewise affects the complimentary energy of the system. Together, this causes a reduction in Cp,” explains Prof. Seol.
The team also varied the concentration of the electrolyte, potassium hydroxide, to see how it impacted EDLC performance. They discovered that the EDLC showed optimal capacitance and Cp reduction when the electrolyte concentration was 8 M. They attributed this to variations in the degree of hydration of ions and their ionic movement.
” A crucial aspect of this study is that charging and releasing likewise alters Cp of EDLCs,” says Prof. Seol. “These findings will extend our understanding of the underlying thermal physics of EDLCs.”.
These results can be thought about a significant step towards future reliable thermal management techniques, which will create safer and more reliable energy storage devices.
Recommendation: “In situ and operando thermal characterization in aqueous electric double layer capacitors utilizing the 3ω hot-wire approach” by Yeongcheol Park, Jaehoon Kim, Changho Kim, Seung-Mo Lee, Chul Kang and Jae Hun Seol, 5 February 2022, International Journal of Heat and Mass Transfer.DOI: 10.1016/ j.ijheatmasstransfer.2022.122632.
Embracing an educated thermal management method is needed for the safe and stable operation of gadgets. To do this, it is needed to understand how specific thermal properties, like heat capability (Cp), dynamically modification during releasing and charging.
Effectively handling the thermal properties of energy storage devices is the key to avoiding thermal runaway and making sure safety. Just recently, researchers from the Gwangju Institute of Science and Technology uncovered crucial changes to the thermal properties of electrical double-layer capacitors throughout discharging and charging, which will help notify future thermal management techniques.
