Heat generation in all-solid-state supercapacitors with graphene electrodes and gel electrolytes

Our heat flux sensors have been used by researchers from the Mechanical and Aerospace Engineering Department at the University of California  (Ampol Likitchatchawankun, Obaidallah Munteshari, Timothy S. Fisher, Laurent Pilon) and the King Fahd University of Petroleum and Minerals at Saudi Arabia (Arpan Kundu) to explore the behavior of supercapacitators. The paper is published in the journal Electrochimica Acta.

The study assesses the time-dependent heat generation in all-solid-state supercapacitors. The electrodes were separated by either conventional PVA gel or a redox-active potassium ferricyanide/ferrocyanide PVA gel. The heat generation was measured using a custom-made calorimeter, which utilized greenTEG’s gSKIN® XP heat flux sensors. The total heat generation rate is the sum of the reversible and irreversible heat generations, where the irreversible part is caused by resistive losses and the reversible part by electric double layer (EDL) formation. The rate was different at the positive and negative electrodes.  In conclusion, heat generation measurements can be used to provide insight into the electrochemical processes occurring during the charging/discharging of all-solid-state supercapacitors.

Supercapacitators  store electrical energy in an electrical field, bringing the gap between electrolytic capacitators and rechargeable batteries- They are better suited than the later for rapid charging and discharging, and they have more capacity than the former. They are widely used for many applications, including electronics, electric cars, or industrial machines.

Our heat flux sensors can also be used to assess the thermal performance of similar devices, such as capacitators and rechargeable batteries. In all these cases, heat flux sensors are the choice of those researchers that are looking for a reliable and cost-savvy measurement device. For more information about our heat flux sensors, please check our website.

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