Composite binder for battery, and anode and battery including the composite binder

1. A composite binder for an electrode comprising:

an inorganic particle;

a binder polymer; and

an organic-inorganic coupling agent,

wherein the inorganic particle is dispersed in the binder polymer in a colloidal-phase with a pH of about 8 to about 11, and the organic-inorganic coupling agent is bonded on at least a portion of the inorganic particle to couple the inorganic particle to the binder polymer.

2. The composite binder of claim 1 , wherein the inorganic particle is a hydrophilic particle.

3. The composite binder of claim 1 , wherein the inorganic particle is in an amorphous phase.

4. The composite binder of claim 1 , wherein an average particle diameter of the inorganic particle is in a range of about 1 nm to about 1000 nm.

5. The composite binder of claim 1 , wherein the inorganic particle comprises at least one component selected from the group consisting of a metal oxide and a metalloidal oxide.

6. The composite binder of claim 1 , wherein the inorganic particle comprises at least one component selected from the group consisting of silica, alumina, titanium oxide, magnesium fluoride, and zirconium oxide.

7. The composite binder of claim 1 , wherein the organic-inorganic coupling agent is a silane-based compound.

8. The composite binder of claim 1 , wherein the organic-inorganic coupling agent is a hydrolysis product of a silane coupling agent.

9. The composite binder of claim 8 , wherein the silane coupling agent comprises at least one moiety selected from the group consisting of an alkoxy group, a halogen group, an amino group, a vinyl group, a glycidoxy group, and a hydroxyl group.

10. The composite binder of claim 8 , wherein the silane coupling agent comprises at least one component selected from the group consisting of vinylalkylalkoxysilane, epoxyalkylalkoxysilane, mercaptoalkylalkoxysilane, vinylhalosilane, and alkylacyloxysilane.

11. The composite binder of claim 1 , wherein a glass transition temperature of the binder polymer is in a range of about −50° C. to about 60° C.

12. The composite binder of claim 1 , wherein the binder polymer comprises at least one moiety selected from the group consisting of a carboxy group and a hydroxy group.

13. The composite binder of claim 1 , wherein the binder polymer comprises at least one component selected from the group consisting of styrene-butadiene rubber, acrylated styrene-butadiene rubber, acrylonitrile-butadiene rubber, acrylonitrile-butadiene-styrene rubber, acryl rubber, butyl rubber, fluorinated rubber, polytetrafluoroethylene, polyethylene, polypropylene, an ethylenepropylene copolymer, a polyethyleneoxide, polyvinylpyrrolidone, polyepichlorohydrine, polyphosphazene, polyacrylate, polyacrylonitrile, polystylene, an ethylenepropylenediene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, a polyester resin, an acryl resin, a phenol resin, an epoxy resin, polyvinylalchohol, carboxymethyl cellulose, hydroxypropylmethyl cellulose, hydroxy propylcellulose, and diacetyl cellulose.

14. A negative electrode comprising:

a negative active material; and

the composite binder of claim 1 .

15. The negative electrode of claim 14 , wherein the negative active material is a non-carbonaceous material.

16. The negative electrode of claim 14 , wherein the negative active material comprises at least one component selected from the group consisting of a metal that is alloyable with lithium, an alloy of a metal that is alloyable with lithium, and an oxide of a metal that is alloyable with lithium.

17. The negative electrode of claim 14 , wherein the negative active material comprises at least one component selected from the group consisting of Si, Sn, Pb, Ge, Al, SiO x (0<x≦SnO y (0<y≦2), Li 4 Ti 5 O 12 , TiO 2 , LiTiO 3 , and Li 2 Ti 3 O 7 .

18. A lithium battery including the negative electrode of claim 14 ; and a positive electrode.