Lithium secondary battery and method of manufacturing the same

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 particles and/or silicon alloy particles;
• a separator interposed between the electrodes;
• and
• 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 binder contains a polyimide resin represented by the following chemical formula (1):
• where R in the chemical formula (1) is a functional group represented by the following chemical formula (2) or (3):
• and n is within the range of from 10 to 100,000;
• and
• the silicon particles and the silicon alloy particles have an average particle size of 5-25 μm.