Anode for high-energy batteries

Abstract

Anode comprising an anode material, a protective material and a current collector is provided. The anode material is a mixture comprising an active material, at least one electronically conductive agent and at least one binder. The active material may be an alloy of silicon and lithium or an alloy of silicon oxide and lithium. There is provided a process for the preparation of the anode. Also, there is provided use of the anode in the fabrication of a battery.

1 - 45 . (canceled) 
     
     
         46 . An anode comprising: a metal foil, a film of anode material, and at least one protective film. 
     
     
         47 . The anode of  claim 46 , wherein the metal foil is a copper foil, an aluminum foil or an aluminum and carbon foil. 
     
     
         48 . The anode of  claim 46 , wherein the film of anode material is deposited on the metal foil, and the at least one protective film is deposited on the anode material. 
     
     
         49 . The anode of  claim 48 , wherein the metal foil is an aluminum foil, and in a lithium battery when the anode undergoes a cycle, a lithium-aluminum alloy is formed at the interface between the film of anode material and the aluminum foil. 
     
     
         50 . The anode of  claim 46 , wherein the at least one protective film comprises a first protective film and a second protective film, wherein the first protective film is deposited on the metal foil, the film of anode material is deposited on the first protective film, and the second protective film deposited on the film of anode material. 
     
     
         51 . The anode of  claim 46 , wherein the metal foil has a thickness of about 5 to 25 μm. 
     
     
         52 . The anode of  claim 46 , wherein the film of anode material has a thickness of about 5 to 150 μm. 
     
     
         53 . The anode of  claim 46 , wherein the protective film has a thickness of about 1 to 5 μm. 
     
     
         54 . The anode of  claim 46 , wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm. 
     
     
         55 . The anode of  claim 49 , wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm. 
     
     
         56 . The anode of  claim 46 , wherein the metal foil has a thickness of about 10 to 15 μm, wherein the film of anode material has a thickness of about 30 to 50 μm, and wherein the protective film has a thickness of about 1 to 5 μm. 
     
     
         57 . The anode of  claim 49 , wherein the metal foil has a thickness of about 10 to 15 μm, wherein the film of anode material has a thickness of about 30 to 50 μm, and wherein the protective film has a thickness of about 1 to 5 μm. 
     
     
         58 . The anode of  claim 46 , wherein the anode material comprises an alloy of silicon and lithium or an alloy of silicon oxide and lithium. 
     
     
         59 . The anode of  claim 46 , wherein
 wherein the anode material is a mixture comprising:
 an active material, 
 at least one electronically conductive agent, and 
 a binder, and 
   wherein the active material is an alloy of silicon and lithium or the active material comprises silicon oxide and lithium,   wherein the binder in the anode material is a polymer,   wherein, in the anode material, the active material and the at least one electronically conductive agent are in the form of particles in the binder,   wherein the anode material comprises, in mass: 80-95% of the active material, 1-10% of the electronically active conductive agent, and 2-20% of the binder,   
     
     
         60 . The anode of  claim 46 , wherein the protective material comprises:
 at least one electronically conductive agent, and   a binder.   
     
     
         61 . The anode of  claim 59 , wherein the protective material comprises:
 at least one electronically conductive agent, and   a binder.   
     
     
         62 . The anode of  claim 49 , wherein
 wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm.
 wherein the anode material is a mixture comprising:
 an active material, 
 at least one electronically conductive agent, and 
 a binder, and 
 
 wherein the active material is an alloy of silicon and lithium or the active material comprises silicon oxide and lithium, 
 wherein the binder in the anode material is a polymer, 
 wherein, in the anode material, the active material and the at least one electronically conductive agent are in the form of particles in the binder, 
 wherein the anode material comprises, in mass: 80-95% of the active material, 1-10% of the electronically active conductive agent, and 2-20% of the binder, 
 wherein the protective material comprises:
 at least one electronically conductive agent, and 
 a binder. 
 
   
     
     
         63 . A battery comprising the anode of  claim 46 . 
     
     
         64 . The battery according to  claim 63 , which is a lithium battery.