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.

中文翻译：

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基于具有高电气和机械性能的高质量石墨烯的银/石墨烯复合材料

摘要 已经报道了一种基于高质量石墨烯 (HQG) 制备具有优异机械和电学性能的银 (Ag)/石墨烯复合材料的简单有效的方法。HQG 是通过化学剥离的还原氧化石墨烯 (RGO) 热压制成的，而 Ag/HQG 复合材料是通过在高温 (1500 °C) 和中等压力 (40 MPa) 下使用放电等离子体烧结 (SPS) 处理获得的. 由于含氧官能团和缺陷密度低，HQG 在高能球磨后均匀分散在复合材料中。与纯 Ag 相比，所制备的 Ag/RGO 复合材料具有 11% 的电导率和 42% 的显微硬度，并具有最佳的 RGO 添加量（1 wt%）。