Thermal charging of supercapacitors: a perspective

Abstract

A change in temperature can modify the ion density near the electrode surface, and create a potential difference across a supercapacitor.

Hybrid Plasmonics for Energy Harvesting and Sensing of Radiation and Heat

“…Supercapacitors are rechargeable energy storage devices with high power densities and long cyclic life, which store charge through one or a combination of two possible mechanisms. [154] Figure 3-7 illustrates a typical electric double-layer capacitor (EDLC) in which the charge storage mechanism involves reversible physical absorption of ions in an electrolyte on the surface of electrodes with high surface area. When a voltage is applied between the two electrodes, positive and negative ions in the electrolyte accumulate at the interface of the electrolyte with the anode and the cathode,…”

“…Pseudocapacitors use another mechanism to store charges, based on reversible chemical reactions between electrolyte ions and chemically active materials on the electrodes. [154] Another class of supercapacitors called hybrid supercapacitor is merged from the integration of the two aforementioned supercapacitors, which consists of an electric-double layer electrode and a pseudocapacitive electrode. [154,155] Figure 3-7. schematic illustration of an EDLC capacitor.…”

“…[154] Another class of supercapacitors called hybrid supercapacitor is merged from the integration of the two aforementioned supercapacitors, which consists of an electric-double layer electrode and a pseudocapacitive electrode. [154,155] Figure 3-7. schematic illustration of an EDLC capacitor. [154] Supercapacitors have been studied to harvest and store energy from heat through thermally induced charging processes.…”

“…[154,155] Figure 3-7. schematic illustration of an EDLC capacitor. [154] Supercapacitors have been studied to harvest and store energy from heat through thermally induced charging processes. [133,154,156] A layer of ions can be spontaneously formed at a metal/electrolyte interface.…”

Lithium-Ion Capacitor Safety Testing for Commercial Application

“…The variation between the inner temperature and surface temperature of a supercapacitor was investigated [10] with three dimensional symmetric thermal model based on the heating rate measured during cycling [9] The modeling of increased temperature effect was studied in relation to the charge-discharge current of the supercapacitor [18] which shows that the temperature response is dependent on the current applied. The effect of thermal charging on the supercapacitor by inducing an external heat condition was reported in [19]. The mechanical integrity of lithium ion battery was investigated at cell level with a finite element model for cell compression between flat plates, where the compressive and punch indentation test are usually conducted on a stack layer because single layer with small thickness will produce less accurate result [20].…”