Lithium secondary battery and method of manufacturing the same

1. A lithium secondary battery comprising:

a positive electrode; a negative electrode comprising a negative electrode current collector and a negative electrode active material layer formed on the negative electrode current collector, the negative electrode active material layer comprising a binder and negative electrode active material particles containing silicon and/or a silicon alloy; a separator interposed between the electrodes; an electrode assembly comprising the positive electrode, the negative electrode, and the separator; and a non-aqueous electrolyte impregnated in the electrode assembly, wherein

the negative electrode binder contains a polyimide resin having a structure represented by the following chemical formula (1), and the polyimide resin has a weight average molecular weight of from 50,000 to less than 150,000 and has a molecular weight distribution such that the weight ratio of a polyimide resin having a molecular weight of less than 100,000 and a polyimide resin having a molecular'weight from 100,000 to less than 200,000 is from 50:50 to 90:10:

where n is an integer equal to or greater than 1, and R is a functional group represented by the following chemical formula (2) or (3):

2. The lithium secondary battery according to claim 1 , wherein the negative electrode current collector comprises copper or a copper alloy.

3. The lithium secondary battery according to claim 2 , wherein the negative electrode current collector has a surface roughness Ra of from 0.2 μm to 0.5 μm.

4. The lithium secondary battery according to claim 1 , wherein the negative electrode current collector has a surface roughness Ra of from 0.2 μm to 0.5 μm.