5525444 Alkaline secondary battery

5525444 Alkaline secondary battery

Patents Alert/Journal of Power Sources 67 (1997) 327-358 one opening putting said chimney into communication with said duct. 5525444 ALKALINE MET...

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Patents Alert/Journal

of Power Sources 67 (1997)

327-358

one opening putting said chimney into communication with said duct.

5525444 ALKALINE

METAL

SECONDARY

BATTERY

Ito Takeo; Wakai Eiichi; Kumagai Katsuya; Miyamoto Kunihik Yokohama, JAPAN assigned to Toshiba Battery Co Ltd

5525442 ALKALI

353

BATTERY

Shuster Nicholas Madison, OH, UNITED STATES assigned to Westinghouse Electric Corporation An alkali metal battery has an alkali metal anode such as lithium in an organic anolyte and a cathode in an aqueous catholyte. An ion conductive diaphragm allows ions to migrate between the anolyte and the catholyte while limiting the transport of water from the catholyte to the anolyte. In a preferred embodiment, the ion conductive diaphragm is nonporous so that there is no transport of water ion to the anolyte. The battery is particularly useful for long durations of up to a week or longer in seawater.

An alkaline secondary battery is capable of inhibiting an increase of internal pressure in the charging/dlischarging cycles and extending life of charging/discharging cycles. This secondary battery comprises, a case,a paste-type positive electrode accommodated in the case and essentially consisting of a conductive substrate filled with a paste containing an active material and a binder, a negative electrode accommodated in the case, a separator interposed between the positive electrode and the negative electrode, and an alkaline electrolyte accommodated in the case,wherein the binder in the positive electrode contains a copolymer consisting of a vinyl alcohol unit and a unit having COOX group, wherein X is an element selected from the group consisting of hydrogen, alkaline metals and alkaline earth metals.

5527639 5525443 GALVANIC NON-AQUEOIJS SECONDARY ELECTROCHEMICAL BATTERY Okuno Hiromi; Koshina Hizuru; Morita Akiyoshi Osaka, JAPAN assigned to Matsushita Electric Industrial Co Ltd A non-aqueous secondary electrochemical battery which comprises a complex oxide containing lithium for a cathode, a carbon material for an anode, and a mixed solvent for an electrolyte is disclosed. The mixed solvent is obtained by dissolving an inorganic salt in a mixture of a cyclic ester and a chain ester. The cyclic ester is selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate, and gamma-butyrolactone. The chain ester is selected from the group consisting of diethyl carbonate, dimethyl carbonate, ethyl formate,methyl formate, ethyl acetate, methyl acetate, and dimethyl sulfoxide. In this way, a non-aqueous secondary electrochemical battery having improved cycle life capabilities, discharge performance, and low temperature perfcrmance can be obtained.

CELL

Noda Tomohiko; Izuti Shyuiti; Imachi Hiroshi; Takeda Kazunari; Kono Michiyuki; Motogami Kenji; Mori Shigeo Takatsuki, JAPAN assigned to Dai-Ichi Kogyo Seiyaku Co Ltd; Yuasa Corporati A galvanic cell is in which at least one of the negative electrode, the positive electrode and the separator comprises a solid electrolyte prepared by doping an ionic compound to an organic polymer. The organic polymer is a polymer obtained by crosslinking an organic compound having a structure of the general formula (I): (*See Patent for Tabular Presentation*) PS where Z is a residue of a compound containing at least one active hydrogen; A is represented by the following formula (II) (*See Patent for Chemical Structure*) (II) wherein n is an integer of 0 to 25 and R is an alkyl halving 1 to 20 carbon atoms, alkenyl, aryl or alkylaryl; E is at least one of -(R20)-, R2 being an alkylene having two or more carbon atoms; Y is an active hydrogen or a polymerizable functional group; k is an integer of 1 to 12; m is an integer of 1 to 250; p is an integer of 1 to