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Voronoi-Tessellated Graphite Produced by Low-Temperature Catalytic Graphitization from Renewable Resources
Leyi Zhao1, Xiuyun Zhao2, Luke T Burke1
1Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada.
Abstract:
A highly crystalline graphite powder was prepared from the low temperature (800-1000 °C) graphitization of renewable hard carbon precursors using a magnesium catalyst. The resulting graphite particles are composed of Voronoi-tessellated regions comprising irregular sheets; each Voronoi-tessellated region having a small "seed" particle located near their centroid on the surface. This suggests nucleated outward growth of graphitic carbon, which has not been previously observed. Each seed particle consists of a spheroidal graphite shell on the inside of which hexagonal graphite platelets are perpendicularly affixed. This results in a unique high surface area graphite with a high degree of graphitization that is made with renewable feedstocks at temperatures far below that conventionally used for artificial graphites.
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