Negative electrode for lithium secondary battery, lithium secondary battery comprising same, and manufacturing method therefor

A method for manufacturing a lithium secondary battery, the method comprising:

• a first step of forming a negative electrode mixture layer on a current collector;
• a second step of forming a lithium thin film layer on a surface of a release plate;
• a third step of forming a lithium diffusion rate control layer by repeating an atomic layer deposition process of introducing a metal oxide on the lithium thin film layer;
• a fourth step of preparing a negative electrode by stacking products of the first step and the third step, wherein the negative electrode mixture layer and the lithium diffusion rate control layer face each other;
• a fifth step of manufacturing an electrode assembly comprising the negative electrode prepared in the fourth step;
• and
• a sixth step of injecting an electrolyte into the electrode assembly manufactured in the fifth step.

A method for manufacturing a lithium secondary battery, the method comprising:

• a first step of forming a negative electrode mixture layer on a current collector;
• a second step of forming a lithium diffusion rate control layer by repeating an atomic layer deposition process of introducing a metal oxide on the negative electrode mixture layer;
• a third step of manufacturing a negative electrode by laminating a lithium thin film on the lithium diffusion rate control layer;
• a fourth step of manufacturing an electrode assembly comprising the negative electrode prepared in the third step;
• and
• a fifth step of injecting an electrolyte into the electrode assembly.