石墨烯气凝胶的制备方法及在二次电池中的应用研究进展

Progress in preparation of graphene aerogels andtheir application in secondary batteries

石墨烯气凝胶是由石墨烯片层经过相互搭接、组装而成的三维多孔网络结构,具有高电导率、高比表面积、高孔隙率、较高柔韧性和弹性及低密度等特点,在海水表面吸附油污、机械减震、杂质过滤等领域获得了应用。综述了石墨烯气凝胶的主要制备方法,包括自组装法、化学交联法、模板法、3D打印法等,并重点阐述了石墨烯气凝胶在新能源二次电池领域如锂离子电池、锂/硫电池、钠离子电池中的应用研究进展,为探索石墨烯气凝胶的新型制备方法及电池应用提供借鉴。

Graphene aerogel is a three-dimensional porous network structure made up of graphene lamellae through overlapping and assembling.It has the characteristics of high conductivity,high specific surface area,high porosity,high flexibility,elasticity and low density.It has been applied in the fields of oil adsorption on the surface of sea water,mechanical shock absorption and impurity filtration.The main preparation methods of graphene aerogels,including self-assembly,chemical crosslinking,template printing and 3D printing et al.,are reviewed in this paper.The research progress of graphene aerogels in new energy secondary batteries,such as lithium ion batteries,lithium/sulfur batteries and sodium ion batteries,is described in detail herein.This can provide reference for exploring new preparation methods and battery applications of graphene aerogels.