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1. (WO2019008550) POLYANILINE AND GRAPHENE BASED NANOCOMPOSITE MATERIALS FOR CATHODES OF RECHARGEABLE BATTERIES AND METHOD FOR MANUFACTURING THE SAME
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Claims

A hybrid nanocomposite for cathodes of rechargeable batteries comprising: polyaniline in the state of emeraldine base;

nanostructured graphite or few-layered graphene consisting of particles with a lateral size from about 100 to 1000 nm and a thickness from about 1 to 20 layers;

wherein the nanocomposite is a two-component hybrid and the stated components are present in a relative amount from about 75:25 to 99:1 percent of the total weight of the hybrid nanocomposite.

The nanocomposite of claim 1 wherein the nanocomposite is a two-component hybrid comprising the stated components in a relative amount from about 85:15 to 95:5 percent of the total weight of the hybrid nanocomposite and graphene component consisting of particles with a lateral size from about 200 to 5000 nm and a thickness from about 1 to 5 layers.

A method for preparing a hybrid two-component nanocomposite for cathodes of rechargeable batteries comprising polyaniline and nanostructured graphite or few-layered graphene, the method comprising:

formation of a mixture of graphite and water-soluble chemically inert solid substance, inorganic salt in particular;

mechanochemical treatment of the mixture and separation of the nanocomposite comprising nanostructured graphite or few-layered graphene and water-soluble chemically inert solid substance by dry sieving;

removal of the stated chemically inert solid substance from the prepared nanocomposite by washing with water and subsequent drying of the resultant nanostructured graphite or few-layered graphene in vacuum at 60°C;

formation of a reaction mixture combining polyaniline and nanostructured graphite or few-layered graphene; and

solvent-free mechanochemical treatment of the mixture.

The method of claim 3 wherein a reaction mixture combining polyaniline in the state of emeraldine base and the nanocomposite consisting from nanostructured graphite or few-layered graphene and water-soluble chemically inert solid substance, prepared in result of step b), is mechanochemically treated and the resultant hybrid two-component nanocomposite comprising polyaniline and nanostructured graphite or few-layered graphene is prepared by further separation of the prepared three-component nanocomposite consisting of polyaniline, nanostructured graphite or few-layered graphene and water-soluble chemically inert solid substance by dry sieving, removal of the stated chemically inert solid substance from it by washing with water and subsequent drying in vacuum at 60°C.

[Claim 5] The method of claims 3—4, wherein the water-soluble chemically inert solid substance comprises a component selected from the group consisting of NaCI, KCI, KBr, Na2S04, K2S04, MgS04.

[Claim 6] The method of claims 3-5, wherein each step including mechanochemical treatment is substantially solvent-free.

[Claim 7] The nanocomposites of claims 1 -6, which can be used in cathodes of metal or metal-ion rechargeable batteries with metal or metal ion being lithium, sodium, potassium or magnesium.

[Claim 8] Rechargeable batteries, in particular lithium, sodium, potassium or magnesium batteries or corresponding metal ion batteries, with a cathode based on a hybrid nanocomposite of claims 1 -6.