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US 5,707,759 AGranted
Anode for a rechargeable lithium cell and a method of manufacturing it
AssigneeSaft
InventorsBernard Simon, Jean-Pierre Boeuve
Life of this patent
Estimating the term…
Abstract
The invention concerns an anode for a rechargeable lithium cell, comprising a conductive support and a paste containing an electrochemically active material into which lithium can be inserted and a polymer binder, the anode being characterized in that the binder is selected from polyvinyl alcohol, polyvinyl butyral, and copolymers and mixtures thereof.
Claims28
An anode for a rechargeable lithium cell, comprising:
- (a) a conductive support and
- (b) a layer comprising:
- an electrochemically active material forming a host structure into which lithium inserts itself and frees itself during cycling, and a polymer binder selected from the group consisting of polyvinyl alcohol, polyvinyl butyral, polyvinyl alcohol/polyvinyl butyral copolymers and polyvinyl alcohol/polyvinyl butyral mixtures.
A method of manufacturing an anode for a rechargeable lithium cell, comprising the following steps:
- (a) dissolving a polymer binder selected from the group consisting of polyvinyl alcohol, polyvinyl butyral, polyvinyl alcohol/polyvinyl butyral copolymers and polyvinyl alcohol/polyvinyl butyral mixtures, in a solvent selected from the group consisting of water, an alcohol, N-methylpyrrolidone, and mixtures thereof, to give a dissolved binder solution;
- (b) adding an electrochemically active material forming a host structure into which lithium inserts itself and frees itself during cycling to the dissolved binder solution, to form a paste;
- (c) depositing said paste on a conductive support;
- and
- (d) drying said support with said paste thereon until said solvent is evaporated off.
2 more elements
An anode for a rechargeable lithium cell, formed by a method comprising the steps of:
- (a) dissolving a polymer binder selected from the group consisting of polyvinyl alcohol, polyvinyl butyral, polyvinyl alcohol/polyvinyl butyral copolymers and polyvinyl alcohol/polyvinyl butyral mixtures, in a solvent selected from the group consisting of water, an alcohol, N-methylpyrrolidone, and mixtures thereof, to give a dissolved binder solution;
- (b) adding an electrochemically active material comprising a host structure into which lithium inserts itself and frees itself during cycling to the dissolved binder solution, to form a paste;
- (c) depositing said paste on a conductive support;
- and
- (d) drying said support with said paste thereon until said solvent is evaporated off.
2 more elements
Dependencies are inferred from the claim text.