Dual-Crossliked aqueous binder for lithium secondary battery

摘要

First polymer chains each having at least one anionic group, bivalent or more metal cations that interact with the anion groups of the first polymer chains to fix the first polymer chains to each other, and a first polymer having the at least one anion group A binder composite comprising second polymer chains covalently linked with a chain; And a crosslinking agent polymerized on the second polymer chains to connect the second polymer chains. The first polymer chains are crosslinked through the divalent or higher metal cation which is a physical crosslinking agent, and the second polymer chains are crosslinked through the chemical crosslinking agent. Therefore, the electrode composition of the present invention has a characteristic of being crosslinked in a double, and the electrode comprising the electrode composition has the feature that the cycle, life, high rate characteristics are improved.