IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0377504
(1989-07-10)
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발명자
/ 주소 |
- Chi Ignacio (North Andover MA) Fang Wei-Chou (Bridgewater NJ)
|
출원인 / 주소 |
- AT&T Bell Laboratories (Murray Hill NJ 02)
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인용정보 |
피인용 횟수 :
8 인용 특허 :
3 |
초록
▼
This invention relates to a process of fabricating a rechargeable non-aqueous cell and to a cell produced by the process. The cell includes a unique laminated cathode structure. Other structural features of the non-aqueous cell including anode, non-aqueous electrolyte and separator, are generally co
This invention relates to a process of fabricating a rechargeable non-aqueous cell and to a cell produced by the process. The cell includes a unique laminated cathode structure. Other structural features of the non-aqueous cell including anode, non-aqueous electrolyte and separator, are generally conventional. The novel cathode is composed of a current collector consisting of an unperforated metal foil to which are bonded mats of cathode active material, selected from transition-metal chalcogenides. In the process of forming the cathode, a non-perforated metal foil, such as aluminum, is coated with a layer of bonding polymer and after the mats of cathode-active material, such as niobium triselenide, are placed on both sides of the metal foil, the composite is compacted, preferably by passing between rollers. Electronic conduction is enhanced by either admixing carbon black with the polymer or coating that surface of the mats which is to be in contact with the metal foil, with a thin layer of carbon black. This design results in cells which show a distinct improvement in energy at higher rate discharges, e.g. at 3-4A, or at lower temperatures, e.g. -20°C., lower cost and weight than cells with conventional cathode collector having screen or grid of expanded metal, e.g. Ni, and are expected to ameliorate internal shorts resulting from the use of ex-met grids.
대표청구항
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A process of production a non-aqueous secondary cell comprising an alkali metal anode electrode, a cathode electrode with cathode active material, a separator, and an electrolyte comprising an organic solvent having an alkali metal dissolved therein, said cathode active material comprisng at least o
A process of production a non-aqueous secondary cell comprising an alkali metal anode electrode, a cathode electrode with cathode active material, a separator, and an electrolyte comprising an organic solvent having an alkali metal dissolved therein, said cathode active material comprisng at least one chaloceginde material selected from the group consisting of NbSe2, NbSe3, NbS3, MoS2, TiS2, TiS3, TaSe3, TaS2, V6O13, CoO2 and MoO2said process including the step of assembling the anode electrode, the cathode electrode, the separator and the electrolyte to form a non-aqueous secondary cell, wherein said positive electrode is produced by bonding mats of positive electrode active material to opposite surfaces of a metal foil acting as a current collector, the metal being chemically inert under operating conditions of the cell, said bonding including coating said opposite surfaces of the metal foil with a layer of a bonding polymer, placing mats of positive electrode active material in contact with said coated surfaces of the foil so as to form a metal foil and mats composite, and compacting the composite to a desired thickness.
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