Anode for secondary battery and secondary battery having the same

Patent metadata

Field	Value
Publication number	US-9537154-B2
Application number	US-201414554658-A
Country	US
Kind code	B2
Filing date	Nov 26, 2014
Priority date	Nov 27, 2013
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

The present disclosure provides an anode for a secondary battery, comprising a wire-type current collector; a metallic anode active material layer formed on the surface of the wire-type current collector and comprising a metallic anode active material; and an inert metal layer formed on the surface of the metallic anode active material layer and having no reactivity with lithium.

First claim

What is claimed is:

1. An anode for a secondary battery, comprising:
a wire-type current collector; a metallic anode active material layer formed on the surface of the wire-type current collector and comprising a metallic anode active material; and
an inert metal layer formed on the surface of the metallic anode active material layer and having no reactivity with lithium; and
a conductive layer formed to surround the outer surface of the inert metal layer and comprising a mixture of a first conductive material and a polymer binder.

2. The anode according to claim 1 , wherein the wire-type current collector is made of stainless steel; aluminum; nickel; titanium; sintered carbon; copper; stainless steel treated with carbon, nickel, titanium or silver on the surface thereof; an aluminum-cadmium alloy; a non-conductive polymer treated with a second conductive material on the surface thereof; or a conductive polymer.

3. The anode according to claim 2 , wherein the second conductive material is any one selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, indium tin oxide (no), copper, silver, palladium, nickel, and a mixture thereof.

4. The anode according to claim 2 , wherein the conductive polymer is a polymer selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, and a mixture thereof.

5. The anode according to claim 1 , wherein the metallic anode active material is an active material selected from the group consisting of a metal (Me) of Si, Sn, Li, Zn, Mg, Cd, Ce, Ni or Fe; an alloy of the metal; an oxide (MeOx) of the metal; a complex of the metal and carbon; and a mixture thereof.

6. The anode according to claim 1 , wherein the inert metal is an active material selected from the group consisting of nickel, copper, iron, vanadium (V), manganese, cobalt, and a mixture thereof.

7. The anode according to claim 1 , wherein the inert metal layer is formed by way of plating.

8. The anode according to claim 1 , wherein the first conductive material is any one selected from the group consisting of carbon black, acetylene black, Ketjen black, Denka black, carbon fiber, and a mixture thereof.

9. The anode according to claim 1 , wherein the polymer binder is any one selected from the group consisting of polyvinylidene fluoride-co-hexafluoro propylene, polyvinylidene fluoride-co-trichloro ethylene, polymethyl methacrylate, polybutylacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, polyvinylalcohol, polyethylene-co-vinyl acetate, polyethylene oxide, polyarylate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethyl pullulan, cyanoethyl polyvinylalcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, styrene-butadiene rubber, carboxyl methyl cellulose, and a mixture thereof.

10. An anode for a secondary battery, comprising:
a spiral anode consisting of at least two wire-type anodes being spirally twisted with each other, each of the wire-type anodes comprising a wire-type current collector, and a metallic anode active material layer formed on the surface of the wire-type current collector and comprising a metallic anode active material; and
an inert metal layer formed on the surface of the spiral anode and having no reactivity with lithium.

11. The anode according to claim 10 , wherein the spiral electrode has a twist rate of 0.01 to 10 mm per one twist.

12. The anode according to claim 10 , which further comprises a conductive layer formed to surround the outer surface of the inert metal layer and comprising a mixture of a first conductive material and a polymer binder.

Assignees

• Lg Chemical Ltd

Inventors

• Kwon Yo-Han
• Woo Sang-Wook
• Kim Je-Young

Classifications

• H01M4/75 Primary

  Wires, rods or strips · CPC title

• H01M4/366

  as layered products · CPC title

• H01M10/0422

  Cells or battery with cylindrical casing · CPC title

• C25D3/562

  containing more than 50% by weight of iron or nickel or cobalt · CPC title

• C25D5/14

  two or more layers being of nickel or chromium, e.g. duplex or triplex layers · CPC title