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A graft copolymer, a method for producing the same, a polymer binder for a silicon anode including the same, a silicon anode including the polymer binder for the silicon anode, and a lithium ion battery including the silicon anode
A graft copolymer, a method for producing the same, a polymer binder for a silicon anode including the same, a silicon anode including the polymer binder for the silicon anode, and a lithium ion battery including the silicon anode
The present invention relates to a graft copolymer, a manufacturing method thereof, a polymer binder for a silicone negative electrode comprising the same, a silicone negative electrode including the polymer binder for a silicone negative electrode, and a lithium ion battery including the silicon negative electrode, and more particularly, to a poly By forming a graft copolymer in which side chain polymers of uredo-pyrimidinone functionalized with acrylate groups and poly(ethylene glycol) functionalized with methyl methacrylate groups are bonded to both ends of the acrylic acid main chain, the silicone has excellent self-healing properties When applied as a binder for an anode, the structural collapse caused by volume expansion of the silicon anode can be efficiently restored. In addition, it has high ionic conductivity, so that the energy density and power density of the electrode can be improved, and excellent physical stability and mechanical properties can be obtained by interaction with the silicon anode. On the other hand, the silicon negative electrode according to the present invention can significantly improve the capacity, coulombic efficiency, lifespan and output characteristics of the battery by including a polymer binder excellent in self-healing properties and ion conductivity.
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