Phys.org May 9, 2022 Researchers in South Korea investigated the thermal properties of electric double-layer capacitors (EDLCs) for a technical foundation in thermal measurement and revealed significant information. The reversible entropy and free energy changes in the EDLCs caused dynamic changes in the effective heat capacity of the electrodes, which were monitored in real-time during charge and discharge operations. In an EDLC with a 6 M KOH electrolyte, the effective heat capacities of the positive and negative electrodes with a varying voltage from 0 to 1 V were estimated to decrease by approximately 9.14% and 3.91%, respectively. This polarization dependence […]
Tag Archives: Thermodynamics
Experiment reverses the direction of heat flow
Science Daily June 27, 2019 An international team of researchers (Brazil, Germany, Singapore) has experimentally demonstrated the reversal of heat flow for two quantum correlated spins-1/2, initially prepared in local thermal states at different effective temperatures, employing a Nuclear Magnetic Resonance setup. They observed a spontaneous energy flow from the cold to the hot system. This process is enabled by a tradeoff between correlations and entropy that they quantified with information-theoretical quantities. These results highlight the subtle interplay of quantum mechanics, thermodynamics and information theory. They further provide a mechanism to control heat on the microscale…read more. Open Access TECHNICAL ARTICLE