Electrode for lithium secondary battery and method for producing the same
The electrode for a lithium secondary battery includes: a current collector; an interlayer containing Mo or W provided on the current collector; and a thin film composed of active material capable of lithium storage and release deposited on the interlayer.
1. An electrode for a lithium secondary battery comprising:
a current collector;
an interlayer containing Mo or W provided on said current collector; and
a thin film composed of active material capable of lithium storage and release deposited on said interlayer.
2. The electrode for a lithium secondary battery according to claim 1 , wherein said thin film is substantially amorphous or microcrystalline.
3. The electrode for a lithium secondary battery according to claim 1 , wherein said thin film includes silicon or germanium as a main component.
4. The electrode for a lithium secondary battery according to claim 1 , wherein a surface of said interlayer is roughened.
5. The electrode for a lithium secondary battery according to claim 4 , wherein the surface of said interlayer is roughened in correspondence with a roughened surface of said current collector.
6. The electrode for a lithium secondary battery according to claim 1 , wherein said current collector includes Cu.
7. A lithium secondary battery comprising a negative electrode made of the electrode according to claim 1 , a positive electrode and a nonaqueous electrolyte.
8. A method for producing an electrode for a lithium secondary battery comprising the steps of:
forming an interlayer containing Mo or W on a current collector; and
depositing a thin film composed of active material capable of lithium storage and release on said interlayer.
9. The method for producing an electrode for a lithium secondary battery according to claim 8 , wherein said interlayer is formed by a vapor evaporation method, a CVD method, a sputtering method or a plating method.
10. The method for producing an electrode for a lithium secondary battery according to claim 8 , wherein said thin film is formed by a sputtering method, a CVD method, a vapor evaporation method, a spraying method or a plating method.
11. A lithium secondary battery comprising a negative electrode made of the electrode produced by the method according to claim 8 , a positive electrode and a nonaqueous electrolyte.