Dai-ichi Kogyo Seiyaku Co., Ltd.

Nippon Shokubai Co., Ltd.

Hydro-quebec

Other

Denso Corporation

Dai Nippon Printing Co., Ltd.

A School Corporation Kansai University

Yuasa Corporation

Elexcel Corporation Ltd.

Michiyuki Kono

Shigeo Mori

Masahito Nishiura

Eriko Ishiko

Manabu Kikuta

Masayoshi Watanabe

Kenji Motogami

Taketo Toba

Fumihide Tamura

Jun Hasegawa

Tsutomu Sada

Tetsuya Higashizaki

Kazunari Takeda

Shyuiti Izuti

Shigetaka Takamiya

Toshinori Sugimoto

Eriko Hayashi

Hitoshi Saito

Karim Zaghib

Abdelbast Guerfi

Alain Vallee

Ryohei Takiguchi

Masanori Torii

Fernand Brochu

Michel Duval

Martin Dontigny

Tetsuo Shiraiwa

Koichiro Saeki

Tomohiko Noda

Hirohito Komori

Hiromochi Muramatsu

Toshiaki Kuriyama

Kazuo Takei

Hiroshi Imachi

Ritsuo Kitada

Masashi Ishikawa

Masashi Yukitake

Hirohiko Saito

Kazuhiko Murata

Masaki Tezuka

Hiroshi Tanaka

Takao Yokohashi

Takao Nishihata

Yoshiharu Matsuda

A flame-retardant lithium secondary battery is provided that has better battery performance and higher safety than conventional batteries. The lithium secondary battery uses a positive electrode that includes a positive electrode active material of the general formula (1) below, and a nonaqueous electrolytic solution in which an ionic liquid that contains bis(fluorosulfonyl)imide anions as an anionic component is used as the solvent, (1) LiNixMnyO, wherein x and y are values that satisfy the relations x+y=2, and x:y=27.572.5 to 22.577.5.

Lithium secondary battery using ionic liquid

The lithium secondary battery of the present invention is a lithium secondary battery including a positive electrode, a negative electrode, a separator provided between the positive electrode and the negative electrode, and a non-aqueous electrolyte containing a lithium salt, wherein the non-aqueous electrolyte includes, as a solvent, an ionic liquid containing a bis(fluorosulfonyl)imide anion as an anion component; and the separator is a nonwoven fabric comprising at least one member selected from an organic fiber and a glass fiber and has a porosity of 70% or more.

The invention relates to a method for manufacturing an electrochemical cell comprising an anode and a cathode separated by a separator and a gel electrolyte. The method comprises the steps of assembling the electrodes and the separator, and injecting a liquid electrolyte composition between the electrodes, the liquid electrolyte composition comprising a polymer, an aprotic liquid solvent and a lithium salt, wherein the polymer in the liquid electrolyte composition has functional groups capable of polymerizing via cationic polymerization, and the cell is submitted to an electrochemical cycling comprising a charging step and a discharging step.

Method for preparing an electrochemical cell having a gel electrolyte

A positive electrode for use in a lithium battery using water as a dispersion medium, not causing a problem of deteriorating the battery performance due to corrosion of a collector or the like and not forming unevenness on the coating surface, as well as a lithium battery using the positive electrode, the positive electrode used being formed from a positive electrode paste containing a positive electrode active material represented by the following formula (I), a binder ingredient comprising a water dispersible elastomer and a water soluble polymer as a viscosity improver, water as a dispersion medium and a dispersing agent:LiMPO&#x2003;&#x2003;(I)(in the general formula (I) above, M represents a metal atom containing at least one of metal atoms selected from the group consisting of Mn, Fe, Co, Ni, Cu, Mg, Zn, V, Ca, Sr, Ba, Ti, Al, Si, B and Mo, and 0&#x3c;x&#x3c;2).

Positive electrode for use in lithium cell and lithium cell using the same

Provided are a polymeric electrolyte or a nonaqueous electrolyte that can improve a transport rate of charge carrier ions by adding a compound having boron atoms in the structure, preferably one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4), and an electric device such as a cell or the like using the same.

Polyelectrolyte, non-aqueous electrolyte, and electrical device containing the same

To efficiently dry it, a nonionic alkylene oxide-type water-soluble resin is put into a container, then the container is degassed to a prescribed vacuum degree which is maintained while a dry gas having a dew point not higher than prescribed is introduced into the container at a rate not lower than prescribed. Minor volatiles are efficiently removed from the resin in an evaporation tank having a stirring blade. For protecting the dried resin from water, a dry gas is introduced into and air is purged from an empty packaging container whereafter the resin is charged into the container is sealed. By controlling solvent content and visocity of the resin and loading it into a temperature-controlled transportation container and/or unloading it out of the transportation container by the use of a pump, good subsquent processability of the resin and prevention of deterioration thereof are ensured.

Method for drying nonionic alkylene oxide-type water-soluble resin, method for packaging it, and method for transporting it

Polymeric compounds are provided the use of which expedites dissociation of an electrolytic salt. The polymeric compounds have a trivalent boron atom which is a Lewis acid. Transport rates of charge carrier ions can be controlled by trapping counter ions of charge carrier ions in the polymeric chain.

Ion-conductive polymeric compound, polymeric electrolyte and electric device

The present invention is aimed to provide polyether polymers capable of improving an ion conductivity around room temperature as well as ion conductible polymer compositions and electrochemical devices using the same. The above objectives are achieved by using polyether polymers characterized by having the structure unit represented by the formula (1) and the structure unit represented by the formula (2) and/or the structure unit represented by the formula (3), and having polymerizable and/or non-polymerizable functional groups at each end of the molecular chains.

Polyether polymer compounds as well as ion conductible polymer compositions and electrochemical devices using the same

The present invention provides a production process, in which, when an ethylene oxide copolymer is obtained, conditions for obtaining this copolymer having a desirable molecular weight with ease and good reproducibility are provided. The production process for an ethylene oxide copolymer, according to the present invention, comprises the step of carrying out polymerization of a monomer mixture under stirring in a solvent, thereby obtaining the ethylene oxide copolymer, wherein the monomer mixture includes ethylene oxide and a substituted oxirane compound of a structural formula (1) as essential raw materials; with the production process being characterized in that the stirring is carried out by a stirring power of not less than 0.6 kW/m.

Production process for ethylene oxide copolymer

The present invention provides a novel production process for an ethylene oxide resin, in which, when the ethylene oxide resin is obtained, it is arranged that the resin should contain no antistatic agent, and further its water content is also easily controlled in not more than a definite amount, and the thermal damage of the above resin is prevented, and besides, the reduction of the cost can also be actualized. The production process for an ethylene oxide resin, according to the present invention, comprises the step of carrying out devolatilization of a solvent from a polymerization reaction liquid containing the solvent, thereby obtaining the ethylene oxide resin; with the production process being characterized by arranging that: after the devolatilization, the resin should have a solvent concentration of 0.01 to 30 weight % and a water content of not more than 200 ppm, and the resin should contain no antistatic agent.

Production process for ethylene oxide resin

Solid electrolyte

A solid electrolyte is disclosed, which comprises a crosslinked product of an alkylene oxide polymer having a polymerizable double bond at the terminal and/or in the side chain, and an electrolytic salt. In this, the alkylene oxide polymer is thermally crosslinked in the presence of an organic peroxide initiator having an activation energy of at most 35 Kcal/mol and having a half-value period of 10 hours at a temperature not higher than 50&deg; C.

Solid electrolyte and method for producing it

An electric double layer capacitor capable of functioning over a broad temperature range with a reduced incidence of electrolyte leakage and a low rate of self discharge is formed from a solid electrolyte containing (A) a crosslinking product of a polyoxyalkylene having a double bond terminally and/or in its side chain, (B) an electrolyte salt, (C) a low molecular weight polar solvent, and (D) polyacrylonitrile. The above-mentioned polyoxyalkylene (A) is, for example, a compound of the formula (1) below. In formula (1), Z is an active hydrogen compound residue; k is an integer from 1 to 6; R,is an alkyl group having 1 to 8 carbon atoms; Y,is an acryloyl or methacryloyl group; m is an integer from 0 to 460 and n is an integer from 0 to 350, excluding the case in which both m and n are simultaneously equal to 0.

Electric double layer capacitor

A solid battery using a solid electrolyte obtained by dissolving a tetrafunctional high-molecular compound and an electrolyte salt in a solvent and crosslinking the solution by the irradiation of an actinic radiation and/or by heating, wherein the solid electrolyte is one obtained by using a tetrafunctional terminal acryloyl-modified alkylene oxide polymer having a high-molecular chain represented by following formula (I) as the above-described tetrafunctional high-molecular compound, compounding the solvent with the polymer at a ratio of from 220 to 1,900% by weight to the above-described tetrafunctional high-molecular compound, and crosslinking the compounded mixture:

Solid battery

Growing community of inventors

Neyagawa, Japan

Michiyuki Kono