Ag/graphene composite based on high-quality graphene with high electrical and mechanical properties |
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Affiliation: | 1. Suzhou Institute, Wuhan University, Suzhou 215123, China;2. School of Physics and Technology, MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China;3. Center for Electron Microscopy, Wuhan University, Wuhan 430072, China |
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Abstract: | A simple and effective process has been reported to prepare the silver (Ag)/graphene composite with excellent mechanical and electrical properties based on high-quality graphene (HQG). The HQG was fabricated via hot pressing of reduced graphene oxide (RGO) from chemical exfoliation, while the Ag/HQG composite was obtained by using spark plasma sintering (SPS) treatment under high temperature (1500 °C) and moderate pressure (40 MPa). With low oxygen-containing functional groups and defect density, the HQG dispersed homogeneously in the composite after high-energy ball milling. In comparison to pure Ag, the as-prepared Ag/RGO composite exhibited a great enhancement of 11% electrical conductivity and 42% micro-hardness with an optimal RGO adding content (1 wt%). The Ag/HQG composite is expected to open up a new way for the novel Ag-based electrical contact materials, and further to broaden its applications in micro-electronics and switching power. |
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Keywords: | Graphene Silver Composite Electrical property Mechanical property |
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