Binder composition for secondary battery electrode, and electrode mixture

Abstract

The present invention relates to a binder composition for a secondary battery, and an electrode mixture comprising same and, more specifically, to: a binder composition for a secondary battery, the binder composition having excellent characteristics such as binding force and mechanical properties and being capable of maintaining the structural stability of an electrode even in a repeating charge / discharge cycle, thereby being capable of improving the performance of a secondary battery; and an electrode mixture comprising same.

Description

technical field [0001] cross reference [0002] This application claims the benefit of Korean Patent Application No. 10-2018-0126930, filed with the Korean Intellectual Property Office on October 23, 2018, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present invention relates to an electrode binder composition for a rechargeable battery and an electrode mixture comprising the electrode binder composition. Background technique [0004] Due to the rapid increase in the use of fossil fuels, the need to use alternative or clean energy sources increases, and as part of this, research is most active in the field of rechargeable batteries using electrochemistry. [0005] In recent years, with the technological development and increase in demand for portable devices such as portable computers, mobile phones, cameras, etc., the demand for rechargeable batteries as an energy source is rapidly increasing, and among these rechargeable batte...

AI Technical Summary

Problems solved by technology

[0010] Specifically, recently, in order to increase the discharge capacity of electrodes, materials with high discharge capacity such as silicon, tin, silicon-tin alloys, etc. are often mixed with natural graphite, which has a theoretical discharge capacity of 372mAh / g, and therefore, with repeated charging And discharge, the volume expansion rate of the material increases significantly, and the anode material detaches, therefore, the battery capacity decreases rapidly, and the cycle life becomes shorter

[0011] And, the lithium-ion battery will expand due to the gas generated during the decomposition of the electrolyte inside the battery, and if the temperature of the battery increases with the use of electronic products, it will promote the decomposition of the electrolyte, accelerate the expansion, and the stability of the battery sex will decrease

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