POROUS CONDUCTIVE ACTIVE COMPOSITE ELECTRODE FOR LITIHIUM ION BATTERIES
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Feb 21, 2013
app pub date -
Aug 18, 2011
filing date -
Aug 18, 2011
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Abstract
A composite lithium ion battery electrode is formed from an active composite material dispersed in a conductive porous matrix formed over a current collector. The active composite material includes nano-clusters of an active material dispersed on a conductive skeleton structure. The active material is a metal-based material including one or more of Sn, Al, Si, Ti or a carbon-based material including one or more of graphite, carbon fibers, carbon nanotubes (CNT) or combinations thereof, having a particle size ranging from approximately 1 nanometers to approximately 10 microns. The conductive skeleton includes a conductive polymer or a conductive filament. The active material is dispersed on the conductive skeleton through an in situ polymerization process or a chemical grafting process. The conductive porous matrix includes a conductive polymeric binder and lithium ion diffusion channels created by a pore-forming agent. Conductive particles are further included in the conductive porous matrix.
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