Evaluation of Temperature Influence on Electrochemical Processes Occurring in a Lithium-Ion Supercapacitor with the Use of Dynamic Electrochemical Impedance Spectroscopy

Energies

Kazimierz Darowicki¹  Michal Mielniczek¹  Ewa Janicka¹  Lukasz Gawel¹ 

[1] Department of Electrochemistry, Corrosion and Materials Engineering, Faculty of Chemistry, Gdansk University of Technology, 80-233 Gdansk, Poland;

关键词: lithium-ion capacitor;    dynamic impedance measurements;    optimization;    temperature;   

DOI  :  10.3390/en14133807

来源: DOAJ

【 摘 要 】

In order to obtain the full impedance characteristics of a lithium-ion capacitor as a function of temperature, the authors proposed the use of dynamic electrochemical impedance spectroscopy. Impedance tests were carried out under wide range of dynamic temperature changes for lithium-ion supercapacitors. Significant differences in electrochemical processes were observed as a result of working temperature. Moreover, the quality of fitting of the equivalent circuits most frequently used in impedance analysis of lithium-ion capacitors was discussed. The proposed methodology allows for a comprehensive characterization of the performance of these devices and provides key information for their optimization in wide range of operations.

【 授权许可】

Unknown