(EP907214-A1)      Binder for electrochemical system with non-aqueous electrolyte contains acrylonitrile-butadiene rubber and carboxymethyl cellulose with average molecular weight &gt;200000.    Also claimed is an electrochemical system containing the above binder.    Binder contains 50-70, preferably 60-70, wt.% rubber and 30-50, preferably 30-40, wt.% carboxymethyl cellulose.    Claimed system is rechargeable lithium accumulator comprising negative electrode containing the binder.    The negative electrode contains active material selected from metal oxides, sulphides, nitrides, and carbides, and it contains &lt; 6, preferably about 3, wt.% binder.    System also includes positive electrode containing active material based on transition metal lithium oxides.    Electrolyte is a solution of conducting salt dissolved in solvent selected from organic carbonates, alkyl esters, cyclic compounds containing oxygen or nitrogen, and ethers.    USE -   In electrochemical systems, e.g. rechargeable accumulator (claimed).    ADVANTAGE -   Binder provides improved adhesion with active electrode materials, and it is more stable than binders used in earlier work.    (JP11121014-A)      Binder for electrochemical system with non-aqueous electrolyte contains acrylonitrile-butadiene rubber and carboxymethyl cellulose with average molecular weight &gt;200000.    Also claimed is an electrochemical system containing the above binder.    Binder contains 50-70, preferably 60-70, wt.% rubber and 30-50, preferably 30-40, wt.% carboxymethyl cellulose.    Claimed system is rechargeable lithium accumulator comprising negative electrode containing the binder.    The negative electrode contains active material selected from metal oxides, sulphides, nitrides, and carbides, and it contains &lt; 6, preferably about 3, wt.% binder.    System also includes positive electrode containing active material based on transition metal lithium oxides.    Electrolyte is a solution of conducting salt dissolved in solvent selected from organic carbonates, alkyl esters, cyclic compounds containing oxygen or nitrogen, and ethers.    USE -   In electrochemical systems, e.g. rechargeable accumulator (claimed).    ADVANTAGE -   Binder provides improved adhesion with active electrode materials, and it is more stable than binders used in earlier work.    (US6183907-B1)      Binder for electrochemical system with non-aqueous electrolyte contains acrylonitrile-butadiene rubber and carboxymethyl cellulose with average molecular weight &gt;200000.    Also claimed is an electrochemical system containing the above binder.    Binder contains 50-70, preferably 60-70, wt.% rubber and 30-50, preferably 30-40, wt.% carboxymethyl cellulose.    Claimed system is rechargeable lithium accumulator comprising negative electrode containing the binder.    The negative electrode contains active material selected from metal oxides, sulphides, nitrides, and carbides, and it contains &lt; 6, preferably about 3, wt.% binder.    System also includes positive electrode containing active material based on transition metal lithium oxides.    Electrolyte is a solution of conducting salt dissolved in solvent selected from organic carbonates, alkyl esters, cyclic compounds containing oxygen or nitrogen, and ethers.    USE -   In electrochemical systems, e.g. rechargeable accumulator (claimed).    ADVANTAGE -   Binder provides improved adhesion with active electrode materials, and it is more stable than binders used in earlier work.