Current collector for secondary battery and secondary battery including same

Abstract

The present invention relates to a current collector for a secondary battery and a secondary battery including the same. The current collector according to the present invention includes: a conductive base material; and a laminated body in which an insulator is laminated, wherein the insulator is formed with a penetrating insulator A porous insulator with open channels, and the current collector according to the present invention can be used for an electrode of a secondary battery, which can stably maintain the capacity of the secondary battery when charge and discharge cycles are repeated.

Description

technical field [0001] The present invention relates to a current collector for a secondary battery and a secondary battery including the same; more particularly, to a current collector capable of preventing reduction in battery capacity when repeated charge and discharge cycles are repeated, and a secondary battery including the same . Background technique [0002] As the utilization of new renewable energy sources increases, the demand for energy storage devices utilizing batteries decreases dramatically. Usable such batteries are lead batteries, nickel / hydrogen batteries, vanadium batteries, and lithium batteries. However, since the energy density of the lead battery and the nickel / hydrogen battery is very small, there is a problem that a relatively larger space is required to store the same capacity of energy. As for the vanadium battery, since it uses a solution containing heavy metals, there is a problem of causing environmental pollution, and since a small amount of...

AI Technical Summary

Problems solved by technology

[0004] However, considering the conductivity of existing sodium-based secondary batteries such as sodium-sulfur batteries or sodium-nickel chloride batteries and the melting point of the battery composition, if it is a sodium-nickel chloride battery, it should be at least 250 ° C. above operation, and if it is a sodium-sulfur battery, it has the disadvantage of an operating temperature of at least 300°C

Due to the above problems, it is necessary to make up for heat preservation, airtightness, safety, etc. Therefore, there are many unfavorable factors in terms of production, operation, and economy.

In order to solve the above problems, room temperature (Room Temperature) sodium-based batteries have also been developed, but because of their very low output, their competitiveness is significantly lower than that of nickel-hydrogen batteries or lithium batteries

Images