Cathode including a non fluorinated linear chain polymer as...

Details Cathode including a non fluorinated linear chain polymer as... Cathode including a non fluorinated linear chain polymer as...

H - Electricity

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H01M 4/62 (2006.01) H01M 4/04 (2006.01) H01M 4/72 (2006.01) H01M 10/26 (2006.01) H01M 10/40 (2006.01)

Patent

CA 1263141

ABSTRACT A cathode suitable for use in a lithium electrochemical cell is made from a mixture of active cathode material, carbon, and non fluorinated linear chain polymer by a method including the steps of (a) dissolving the non fluorinated linear chain polymer in a non polar solvent at a temperature near the melting point of the polymer; (b) adding the active cathode material and carbon and evaporating the solvent; and (c) grinding the dried mixture into a fine powder and making it into a cathode by pressing the powdered mixture onto both sides of an expanded metal screen and then cutting to the desired dimensions. The cathode can be combined with lithium as the anode and a solution of 0.8 mol dm-3 LiAlCl4 in a mixed organic solvent of 24 mass percent 4-butyrolactone in 1, 2 dimethozyethane as the electrolyte to provide a mechanically stable, relatively inexpensive lithium electrochemical cell having good cell performance.

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