Abstract

We fabricated Mg₂Si-based thermoelectric nanocomposites with reduced graphene oxide using ultrasonic-based wet chemical pulverizing-mixing and spark plasma sintering to improve the trade-off relationship between thermoelectric properties and mechanical reliability. The dependence of thermoelectric properties and mechanical reliability on the nanophase morphologies has been systemically investigated, demonstrating the fracture toughness of the nanocomposite with thin reduced graphene oxide significantly increased. Moreover, the introduction of the few-layered reduced graphene oxide with high interface density was more effective in improving the trade-off relationship. This result suggests that an in-depth research on the dependence of the thermoelectric properties and mechanical reliability on the intrinsic properties of the nanophases is required to prepare efficient thermoelectric nanocomposites.

Graphic Abstract

抽象的

我们制造了Mg ₂硅基热电纳米复合材料具有还原的氧化石墨烯，通过超声基湿化学粉碎混合和火花等离子体烧结来改善热电性能与机械可靠性之间的权衡关系。已经系统地研究了热电性质和机械可靠性对纳米相形态的依赖性，这表明具有减少的稀氧化石墨烯的纳米复合材料的断裂韧性显着提高。而且，引入具有高界面密度的几层还原的氧化石墨烯在改善权衡关系方面更有效。

图形摘要