PRETREATMENT SOLUTION FOR NEGATIVE ELECTRODE CURRENT COLLECTOR OF LITHIUM SECONDARY BATTERY CONTAINING VAPOR PHASE GROWTH CARBON FIBER, PRETREATMENT METHOD OF NEGATIVE ELECTRODE CURRENT COLLECTOR USING THE SOLUTION, AND LITHIUM SECONDARY BATTERY CONTAINING THE NEGATIVE ELECTRODE CURRENT COLLECTOR

摘要

PURPOSE: Provided are a pretreatment solution for a negative electrode current collector of a lithium secondary battery which minimizes the thickness of a pretreatment coating layer and increases the adhesive strength to an active material and conductivity, a pretreatment method of a negative electrode current collector using the pretreatment solution, and a lithium secondary battery containing the negative electrode current collector which is improved in high rate discharge capacity and charge/discharge lifetime and is reduced in internal resistance. CONSTITUTION: The pretreatment solution contains a vapor phase growth carbon fiber. Preferably the pretreatment solution comprises 100 parts by weight of a solid part comprising 50-99 wt% of a polymer binder, 1-50 wt% of a vapor phase growth carbon fiber and optionally 50 wt% or less of a conductive material; and 100-1,000 parts by weight of a solvent. Preferably the vapor phase growth carbon fiber is a graphite-based vapor phase growth carbon fiber.