Nec Tokin Corporation

Ihara Chemical Industry Co., Ltd.

Masaya Mitani

Tomoki Nobuta

Toshihiko Nishiyama

Hiroyuki Kamisuki

Masato Kurosaki

Gaku Harada

Yuji Nakagawa

Shinako Kaneko

Shinya Yoshida

Yuuji Nakagawa

Naoki Takahashi

Tetsuya Yoshinari

Naoto Yazawa

Hideo Ooi

Tetuya Yoshinari

This invention provides an electrode for an electrochemical cell in which an active material in an electrode material is a proton-conducting compound, wherein the electrode material comprises a nitrogen-containing heterocyclic compound or a polymer having a unit containing a nitrogen-containing heterocyclic moiety.

Cell electrode and electrochemical cell therewith

The present invention provides a novel indole carboxylic ester trimer which is characterized by being represented by the following general formula (1): wherein R represents a straight or branched chain alkyl group having 1-6 carbon atoms; n is an integer of 1-4; Xrepresents at least one anion selected from a group of anions having a valency of 1-3 consisting of chloride ion, bromide ion, iodide ion, fluoride ion, nitrate ion, sulfate ion, hydrogen sulfate ion, phosphate ion, borofluoride ion, perchlorate ion, thiocyanate ion, acetic acid ion, propionic acid ion, methanesulfonic acid ion, p-toluenesulfonic acid ion, trifluoroacetic acid ion and trifluoromethanesulfonic acid ion; a represents the ionic valence number of X and is an integer of 1-3; and m is 0-0.5.

Indolecarboxylic ester trimer and electrochemical cell using the same

This invention relates to a polymer having a chain structure of a repeating unit of a proton-conducting compound which causes an electrochemical redox reaction in a solution of a proton source to act as an electrode active material, and a heterocyclic compound structure; and an electrochemical cell comprising the polymer as an electrode active material.

Polymers and electrochemical cell therewith

A secondary battery and capacitor includes as an active material of an electrode a compound having a trimer structure comprising three structure units of one or more kind of indole compounds selected from indole and indole derivatives and a condensed polycyclic structure having a six-membered ring composed of atoms of the second and the third position of the each three structure units, wherein the active material comprises as the compound a first compound having a trimer structure wherein any bonds between the structure units are formed among the second position of one structure unit and the third position of the other structure unit and a second compound having a trimer structure comprising a bond formed among the second position of one structure unit and the second position of the other structure unit, and a proton is utilized as a charge carrier of the first compound and the second compound.

Secondary battery and capacitor utilizing indole compounds

This invention provides an electrode comprising a porous conductive substrate as well as an electrode active material and a conductive auxiliary filled in the pores in the substrate. This electrode exhibits improved shape stability (strength), a lower resistivity and better response. This electrode can be used to provide an electrochemical cell capable of quick charge/discharge and exhibiting improved cycle properties.

Electrode and electrochemical cell therewith

A proton-conducting electric double layer capacitor comprising a electrolytic solution containing an aqueous solution of an organic or inorganic acid whereto a water-soluble N-containing heterocyclic compound is added.

Proton-conducting electric double layer capacitor using electrolytic solution

The present invention provides a secondary battery and a capacitor which may provide an excellent high rate and cycle characteristic as well as sufficient electromotive force and capacity. The secondary battery and a capacitor have an active material of an electrode comprising a trimer compound comprising three units of indole or indole derivatives in condensed ring form, wherein the second position and the third position of each unit form a six-membered ring, and a proton which can be utilized as a charge carrier of the trimer compound.

A small battery and an electric double layer capacitor exhibit adequate cell voltage and capacitor withstand voltage. Specifically, the battery or electric double layer capacitor includes basic cells having a pair of electrodes oppositely laminated via the separator, and an electrolyte are packaged in a resin sheet package. The basic cells are laminated in series via a sheet current collector. The sheet current collector extends to an edge of the resin sheet package around the periphery of the basic cells laminated on both sides of the current collector. The sheet current collector is glued or fused to the resin sheet in its edge. The adjacent basic cells via the sheet current collector are fluid-tightly separated within the resin sheet package.

Battery having a sheet current collector fluid-tightly separating basic cells

A secondary battery of a proton conductive polymer, wherein a positive electrodeand a negative electrodeare arranged facing to each other via a separator in an electrolytic solution and only a proton in a &#x3c0; conjugated polymer or a proton of a hydroxyl group in a hydroxyl-containing macromolecular as an active material of an electrode in the positive and negative electrodes participates in a charge/discharge; the secondary battery uses a membrane, which has acid resistance, oxidation resistance and a functional group having cation exchange function, as the separator

Secondary battery of proton conductive polymer

An electrochemical cell contains, as an electrode active material, a mixture of trimer compounds each in the form of indoles or indole derivatives coupled to each other in second and third positions thereof, and tetramer compounds each of indoles or indole derivatives. In the cell, protons are used as charge carriers.

Electrochemical cell using indole-related compounds

The object of the present invention is to provide a method of producing electric cells which can improve the production yield, and for that purpose there is provided a method of producing an electric cell, wherein an acidic solution as an electrolytic solution and electrically conductive rubber as an exterior material are used, characterized in that sealing both of the positive electrode and the negative electrode piled via the separator with both of the gasket, through which the stainless needle is inserted, and the electrically conductive rubber, performing a vulcanization binding, after said vulcanization binding, forming a hole by pulling off the stainless needle from the gasket, injecting the electrolytic solution through said hole and sealing said hole; thus obtaining electric cells at high production yield.

Method of producing electric cells using substance injection

The present invention relates to an electrolytic solution comprising an aqueous solution of an organic or inorganic acid whereto a water-soluble N-containing heterocyclic compound is added, and an electrochemical cell such as a secondary battery and an electric double layer capacitor that uses such an electrolytic solution.

Electrolytic solution and electrochemical cell using the same

A secondary battery of a proton conductive polymer, wherein a positive electrode and a negative electrode are arranged facing to each other via a separator in an electrolyte and only a proton or a proton of a hydroxyl group in an indole trimer and a &pgr; conjugated polymer, i.e., an active material of electrode in the positive electrode and in the negative electrode participates in a charge/discharge, and a proton concentration is 5 to 40% and an anion concentration is 30 to 60% in the solution, respectively, and the anion concentration is at least higher than the proton concentration.

Secondary battery utilizing indole compounds

An electric energy storage element is provided which contains a secondary battery or a capacitor, and which uses a quinoxaline trimer compound as an electrode active substance and a proton as a charge carrier for the trimer compound. The trimer compound includes a quinoxaline or a quinoxaline derivative.

Growing community of inventors

Miyagi, Japan

Masaya Mitani