Graphene composite film modified by single crystal sapphire whiskers as well as preparation method and application thereof

摘要

#$%^&*AU2018214101A120200227.pdf#####ABSTRACT OF THE DISCLOSURE The invention discloses a graphene composite film modified by single crystal sapphire ) whiskers as well as a preparation method and application thereof. The graphene composite film provided by the invention comprises graphene and single crystal sapphire whiskers, the single crystal sapphire whiskers and the graphene are dispersed in the graphene composite film, and the content by weight of the graphene is greater than that of the single crystal sapphire whiskers. The graphene composite flm can be used to prepare an electrode and applied to lithium ion batteries and capacitors. The graphene composite film has excellent toughness, structural stability and folding resistance as well as excellent electroconductivity and thermoconductivity; and the preparation method thereof is good in reproducibility and low in cost. The electrode has stable structure, low internal resistance, and excellent electroconductivity, thermoconductivity, cycle performance and rate performance during usage as well as charging and discharging. 19Prepare a dispersion containing single crystal SOl sapphire whiskers and graphene oxide Form a film from the dispersion to obtain a S02 graphene oxide composite film S03 Reduce the graphene oxide composite film FIG. 1 20