Electric double layer capacitor and electrolyte therefor
AssigneeAsahi Glass Company, Limited
InventorsTakeshi Kawasato, Manabu Suhara, Kazuya Hiratsuka, Manabu Tsushima
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Abstract
An electric double layer capacitor including electrodes made of carbon material as the main component, and an electrolyte capable of forming an electric double layer at the interface with the electrodes, wherein the electrolyte includes an organic type mixed solvent containing propylene carbonate and an asymmetrical chain carbonic acid ester represented by the general formula R.sup.1 OC(.dbd.O)OR.sup.2, wherein R.sup.1 and R.sup.2 are mutually different monovalent organic groups, and a solute comprising a quaternary onium salt.
Claims17
An electric double layer capacitor comprising at least one electrode made of carbon material as a main component, and an electrolyte capable of forming an electric double layer at the interface with the at least one electrode, wherein the electrolyte comprises an organic mixed solvent containing propylene carbonate and an asymmetrical chain carbonic acid ester represented by the general formula R.sup.1 OC(.dbd.O) OR.sup.2, wherein R.sup.1 and R.sup.2 are mutually different monovalent organic groups, and a solute comprising a quaternary onium salt.
An electrolyte for an electric double layer capacitor, which comprises an organic type mixed solvent containing propylene carbonate and an asymmetrical chain carbonic acid ester represented by the general formula R.sup.1 OC(.dbd.O)OR.sup.2, wherein R.sup.1 and R.sup.2 are mutually different monovalent organic groups, and a solute comprising a quaternary onium salt.
Dependencies are inferred from the claim text.