Enhancing the electrochemical performance of lithium ion battery anodes by poly(acrylonitrile–butyl acrylate)/graphene nanoplatelet composite binder
Graphene nanoplatelet (GnP), which consists of small stacks of graphene, is used as a reinforcement to enhance the performance of the poly(acrylonitrile-butyl acrylate) (PANBA) binder in a lithium ion battery (LIB). To the best of our knowledge, this is the first time that a conductive nanofiller such as GnP has been used in a conventional water-dispersed polymer and applied as a binder for LIB. Our so-called PANBA/GnP nanocomposites are made with either 0.5 wt%, 1 wt%, or 2 wt% of GnP. The nanocomposites are synthesized via an in situ emulsion polymerization technique and are very well-dispersed, homogeneous, and stable for at least 6 months. The elongation and electrical conductivity of the PANBA/GnP nanocomposites exceed those of the PANBA non-filled polymer, and the PANBA/GnP nanocomposite binder ultimately enhances the electrochemical performance of the high-capacity silicon/graphite mixture anode.
KeywordsPoly(acrylonitrile-butyl acrylate) copolymer Graphene nanoplatelet Water-based nanocomposite binder Lithium ion battery anode
This research was financially supported by the Ministry of Trade, Industry, and Energy (MOTIE), Korea, under the “Regional Specialized Industry Development Program” supervised by the Korea Institute for Advancement of Technology (KIAT) (Grant Nos. R0003684, R0005989).
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