An electrolytic capacitor includes an anode body, a dielectric layer disposed on a surface of the anode body, a solid electrolyte layer that is in contact with the dielectric layer, and an ion conductor that is liquid at room temperature. The solid electrolyte layer includes a conductive polymer. The ion conductor includes a solvent, an acid component, and a base component. The content proportion of the solvent in the ion conductor is more than 10% by mass and less than or equal to 60% by mass. The total content proportion of the acid component and the base component in the ion conductor is more than or equal to 40% by mass and less than 90% by mass. A melting point of the ion conductor is lower than or equal to −10° C.

The present invention relates to a method for forming a capacitor having carbon or metal electrodes and an electrolyte which is also a source of electropolymerisable anions. Applying a sufficiently positive voltage, a thin dielectric layer forms at the positive electrode, enabling the use of cell voltages higher than 3.5 V. The construction and characteristics of capacitors with 5, 6.3, and 10 V of cell voltages, having reduced graphene oxide electrodes and an ionic liquid electrolyte, are shown. Further, a method of forming a capacitor, including the steps of: (a) providing a first electrode; (b) providing a first electrolyte including an anionic compound, wherein said compound includes at least one cyano group or at least one nitrile group; (c) electropolymerising said anionic compound in order to form a dielectric layer on at least part of the first electrode; (d) forming a capacitor including the electrode of step (c), a second electrode and a second electrolyte, which is the same or different to the first electrolyte, is claimed. In a further aspect of the invention, there is provided an electronic device including a capacitor, a transistor or an electrode produced by means of a method as defined above. It is believed that a number of dielectric compounds produced by the method as defined above are new compounds not previously isolated. Accordingly, polytetracyanoborate, polycyani, or polytricyanomethanide.

Disclosed are a hybrid aluminum electrolytic capacitor and a method of producing the same. The preparation method includes impregnating a capacitive element in a fluid to improve the low-temperature property, where the fluid is prepared from a first organic solvent having a boiling point of 180° C. or more and a melting point of −50° C. or less, a small number of an inorganic or organic acid and an amine having a boiling point of 180° C. or more.

An electrochemical cell includes solid-state, printable anode layer, cathode layer and non-aqueous gel electrolyte layer coupled to the anode layer and cathode layer. The electrolyte layer provides physical separation between the anode layer and the cathode layer, and comprises a composition configured to provide ionic communication between the anode layer and cathode layer by facilitating transmission of multivalent ions between the anode layer and the cathode layer.

An electrochemical cell includes solid-state, printable anode layer, cathode layer and non-aqueous gel electrolyte layer coupled to the anode layer and cathode layer. The electrolyte layer provides physical separation between the anode layer and the cathode layer, and comprises a composition configured to provide ionic communication between the anode layer and cathode layer by facilitating transmission of multivalent ions between the anode layer and the cathode layer.

A hermetically sealed capacitor and method of manufacturing are provided. The hermetically sealed capacitor includes an anode element having an anode wire and a feed through barrel, a cathode element, a first case portion having a first opening portion and a second case portion having a second opening portion. The first and second opening portions form an opening configured to mate with the feed through barrel. The first opening portion may include a slot portion configured to receive the feed through barrel. The hermetically sealed capacitor may also include electrolytic solution disposed between the first and second case portions.

A hermetically sealed capacitor and method of manufacturing are provided. The hermetically sealed capacitor includes an anode element having an anode wire and a feed through barrel, a cathode element, a first case portion having a first opening portion and a second case portion having a second opening portion. The first and second opening portions form an opening configured to mate with the feed through barrel. The first opening portion may include a slot portion configured to receive the feed through barrel. The hermetically sealed capacitor may also include electrolytic solution disposed between the first and second case portions.

Provided is an electrolyte salt comprising a quaternary ammonium cation indicated by formula (1) and a trimethylsilyl alkanesulfonate anion indicated by formula (2). ##STR00001##
(In the formula, R.sup.1-R.sup.4 each independently indicate a C1-4 alkyl group or an alkoxyalkyl group indicated by —(CH.sub.2).sub.n—OR. Any two among R.sup.1-R.sup.4 can mutually bond and form a ring together with a nitrogen atom to which same have bonded. The remaining two can mutually bond and form a spiro ring having a nitrogen atom as the spiro atom therefor. R indicates a methyl group or an ethyl group. n indicates 1 or 2 and m indicates 2 or 3.)

Provided is an electrolyte salt comprising a quaternary ammonium cation indicated by formula (1) and a trimethylsilyl alkanesulfonate anion indicated by formula (2). ##STR00001##
(In the formula, R.sup.1-R.sup.4 each independently indicate a C1-4 alkyl group or an alkoxyalkyl group indicated by —(CH.sub.2).sub.n—OR. Any two among R.sup.1-R.sup.4 can mutually bond and form a ring together with a nitrogen atom to which same have bonded. The remaining two can mutually bond and form a spiro ring having a nitrogen atom as the spiro atom therefor. R indicates a methyl group or an ethyl group. n indicates 1 or 2 and m indicates 2 or 3.)

A manufacturing method for a capacitor is provided. The method includes the following steps. A nano carbon material and an electrolyte solution are mixed to obtain an electrolyte composition. A porous substrate is immersed in the electrolyte composition. The electrodes are formed on two opposite surfaces of the porous substrate.