BINDER COMPOSITION FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, AND SLURRY COMPOSITION FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY USING SAME

摘要

The purpose of the present invention is to achieve both an increase in the capacity of a battery and an improvement of the rate characteristics without impairing the binding property of a negative electrode binder. The present invention provides a binder composition, for a lithium ion secondary battery negative electrode, containing a neutralized salt of an α-olefin-maleic acid copolymer obtained by copolymerization of an α-olefin and a maleic acid, and a lithium ion secondary battery negative electrode and a lithium ion secondary battery using the binder composition.