New heat-tolerant, high-capacity capacitor created with solid electrolytes borrowed from all-solid-state batteries

Bulk-type symmetric all-solid-state capacitor, with a LBSC SE layer between two electrode layers of an LBSC-CNT composite (left), showed low resistance and were operable at 100–300 °C (right). Credit: Hayashi, Osaka Metropolitan University

Capacitors are energy storage devices—consisting of two electrodes and an electrolyte—that are capable of rapid charging and discharging because of charge adsorption and desorption properties at the electrode-electrolyte interface. Because capacitors’ energy storage does not involve chemical reactions, their storage capacity is lower than that of lithium-ion batteries, but they are useful for power leveling for renewable energy that requires repeated charging at high currents, regenerative …

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