Anode and battery using the same

Abstract

An anode, an anode current collector, an anode active material and a battery using the anode are provided. The anode includes the anode current collector and the anode active material. The anode current collector has a projection. The anode active material layer is formed via at least one of a vapor deposition method, a liquid-phase deposition method, a sintering method and the like.

1 . An anode, comprising:
 an anode current collector comprising a projection provided on a substrate, the substrate having an arithmetic mean roughness Ra of 0.05 μm to 0.2 μm; and   an anode active material layer disposed on the anode current collector and the projection,   wherein the anode active material layer is alloyed with the anode current collector in at least a portion of an interface with the anode current collector, and   wherein the anode active material layer includes at least one kind selected from the group consisting of silicon and silicon compounds.   
     
     
         2 . The anode according to  claim 1 , wherein the projection is in a particle shape selected from the group consisting of a square shape, a spherical shape, a rock shape and a block shape. 
     
     
         3 . The anode according to  claim 1 , wherein the projection includes an element capable of being alloyed with the anode active material layer. 
     
     
         4 . The anode according to  claim 1 , wherein the projection includes at least one constituent selected from the group consisting of copper (Cu), nickel (Ni), iron (Fe), aluminum (Al), indium (In), cobalt (Co), manganese (Mn), zinc (Zn), silver (Ag), tin (Sn), germanium (Ge) and lead (Pb). 
     
     
         5 . The anode according to  claim 1 , wherein the anode active material layer is alloyed with the projection in at least a portion of an interface with the projection. 
     
     
         6 . The anode according to  claim 1 , wherein the average diameter of the projection ranges from about 3 μm to about 10 μm. 
     
     
         7 . The anode according to  claim 1 , wherein the average diameter of the projection ranges from about 3 μm to about 5 μm. 
     
     
         8 . The anode according to  claim 1 , wherein the anode active material layer is formed by at least one method selected from the group consisting of a vapor deposition method, a liquid-phase deposition method and a sintering method. 
     
     
         9 . A battery, comprising:
 a cathode;   an anode; and   an electrolyte,   wherein the anode includes:
 an anode current collector comprising a projection provided on a substrate, the substrate having an arithmetic mean roughness Ra of 0.05 μm to 0.2 μm; and 
 an anode active material layer disposed on the anode current collector and the projection, 
   wherein the anode active material layer is alloyed with the anode current collector in at least a portion of an interface with the anode current collector, and   wherein the anode active material layer includes at least one kind selected from the group consisting of silicon and silicon compounds.   
     
     
         10 . The battery according to  claim 9 , wherein the projection is in a particle shape selected from the group consisting of a square shape, a spherical shape, a rock shape and a block shape. 
     
     
         11 . The battery according to  claim 9 , wherein the projection includes an element capable of being alloyed with the anode active material layer. 
     
     
         12 . The battery according to  claim 9 , wherein the projection includes at least one constituent selected from the group consisting of copper (Cu), nickel (Ni), iron (Fe), aluminum (Al), indium (In), cobalt (Co), manganese (Mn), zinc (Zn), silver (Ag), tin (Sn), germanium (Ge) and lead (Pb). 
     
     
         13 . The battery according to  claim 9 , wherein the anode active material layer is alloyed with the projection in at least a portion of an interface with the projection. 
     
     
         14 . The battery according to  claim 9 , wherein the average diameter of the projection ranges from about 3 μm to about 10 μm. 
     
     
         15 . The battery according to  claim 9 , wherein the average diameter of the projection ranges from about 3 μm to about 5 μm. 
     
     
         16 . The battery according to  claim 9 , wherein the anode active material layer is formed by at least one method selected from the group consisting of a vapor deposition method, a liquid-phase deposition method and a sintering method. 
     
     
         17 . The battery according to  claim 9 , wherein the electrolyte includes a solvent, an electrolyte salt and a body which retains the solvent and electrolyte salt. 
     
     
         18 . The battery according to  claim 9 , comprising a package part made of a film for containing the cathode, the anode and the electrolyte therein. 
     
     
         19 . The battery according to  claim 9 , wherein the cathode includes a lithium-containing metal composite oxide.