Battery

• US 5,279,910 A
• Filed: 07/31/1992
• Issued: 01/18/1994
• Est. Priority Date: 08/01/1991
• Status: Expired due to Term

• Current Assignee: GS Yuasa Corporation, Japan Atomic Energy Research Institute
• Original Assignee: Yuasa Battery Company Limited (GS Yuasa Corporation), Japan Atomic Energy Research Institute
• Inventors: Sasaki, Takashi, Takeda, Kazunari, Noda, Tomohiko, Ishigaki, Isao, Izuti, Shyuiti
• Primary Examiner(s): Skapars, Anthony
• Application Number:
  US07/922,751
• Time in Patent Office: 536 Days
• Field of Search: 429/212, 429/213, 429/218, 429/192
• US Class Current: 429/213
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 4/02 Electrodes composed of, or comprising, active material
• CPC Class Codes: H01M 4/60 of organic compounds
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The improved battery for reversible operation at ambient temperature comprises a negative electrode, a composite positive electrode which is composed of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity, an electrochemically active material and, optionally, an electron conductive material, and an electrolyte which is made of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity. The improvement is such that said composite positive electrode and said electrolyte are formed by exposure to an active radiation such as ultraviolet rays or ionizing radiation. Thanks to the improvement in electrolyte and positive electrode, the battery can be fabricated with great ease, is entirely free from the possibility of electrolyte leakage and has high long-term reliability and safety.

Claims

1. A battery, said battery comprising:

a negative electrode,

a composite positive electrode which is composed of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity,

an electrochemically active material and,

optionally, an electron conductive material, and

an electrolyte which is made of an ion-conductive high-molecular weight compound that has at least one ionic compound dissolved therein and that has a polyether structure and ion conductivity,

wherein the high-molecular weight compound of said composite positive electrode and said electrolyte has a crosslinked network structure consisting of an ether linkage by a polyether having a polyfunctional hydroxyl group and a diacrylate upon reaction by exposure to an active radiation such as ultraviolet rays or ionizing radiation.

2. A battery according to claim 1 wherein each of said ion-conductive high-molecular weight compound is a polyether having a reactive double bond that has at least one ionic compound dissolved therein and it will acquire a crosslinked network structure upon reaction by exposure to said active radiation.

3. A battery according to claim 1 or 2 wherein an electron beam is used as the active radiation and applied at an acceleration voltage of at least 100 kV.

4. A battery according to claims 1, 2 or 3 wherein each of said ion-conductive high-molecular weight compounds contains a material that is capable of dissolving ionic compounds.