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US 8,795,888 B2Granted
Aqueous co-polymer binder for Li-ion battery
AssigneeBren-Tronics Batteries International, L.L.C.
InventorsMilburn Ebenezer Jacob Muthu, Jacob Benjamin Behler
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Abstract
A battery having an electrode mix comprising water, a conductive additive and a poly(acrylonitrile-co-acrylamide) co-polymer as a binder. The use of poly(acrylonitrile-co-acrylamide) co-polymer eliminates the need for a separate thickener.
Claims15
A battery comprising:
- a positive electrode mix and a negative electrode mix both comprising:
- (i) an electrode active material;
- (ii) a water soluble binder consisting of a polymer and water and having a viscosity in the range of 6,000 to 10,000 centipoise, wherein the water soluble binder is provided in the absence of a thickening agent or any external reagent;
- and
- (iii) a conductive additive material;
- and
- an electrolyte.
4 more elements
A battery comprising:
- (a) a positive electrode mix comprising:
- a positive active material selected from the group consisting of LiCoO2, LiNiO2, LiNi1/3Co1/3 Mn1/3O2, LiNi0.8Co0.15Al0.05O2, Li1+xNi1/3Co1/3Mn1/3O2, LiMn2O4 LiFePO4 coated with one of graphite and carbon and Li2Mn2O4, LiMP04 where M is one or more of the first row transition-metal cations selected from the group consisting of Fe, Mn, Ni, Ti, Co and combinations thereof;
- a water soluble binder consisting of a polymer and water and having a viscosity in the range of 6,000 to 10,000 centipoise, wherein the water soluble binder is provided in the absence of a thickening agent or any eternal reagent;
- and
- a conductive additive selected from the group consisting of carbon black, acetylene black, carbon fibers, coke, high surface area carbon and graphite and combinations thereof;
- (b) a negative electrode mix comprising:
- a negative active material selected from the group consisting of graphite, hard carbon, silicon, tin and lithium titanate;
- a water soluble binder consisting of a polymer and water and having a viscosity in the range of 6,000 to 10,000 centipoise, wherein the water soluble binder is provided in the absence of a thickening agent or any external reagent;
- and
- a conductive additive selected from the group consisting of carbon black acetylene black, carbon fibers, coke, high surface area carbon and graphite and combinations thereof;
- and
- (c) an electrolyte comprised of lithium salt in cyclic and linear carbonates.
9 more elements
Dependencies are inferred from the claim text.