Preparation of functional composite materials based on chemically derived graphene using solution process

1st International Conference on Rheology and Modeling of Materials

物理学;材料科学

Kim, M.^1 ; Hyun, W.J.^1 ; Mun, S.C.^1 ; Park, O.O.^1

KAIST, Polymer Nanomaterials Laboratory, Chemical and Biomolecular Engineering Department, Daejeon, Korea, Republic of^1

关键词: Chemically derived graphene;    Electrical conductivity;    Folding and unfolding;    Functional composites;    Gas barrier properties;    Layer-by-layer assembly technique;    Optical transparency;    Solvent dispersions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/602/1/012027/pdf
DOI  :  10.1088/1742-6596/602/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Chemically derived graphenes were assembled into functional composite materials using solution process from stable solvent dispersion. We have developed foldable electronic circuits on paper substrates using vacuum filtration of graphene nanoplates dispersion and a selective transfer process without need for special equipment. The electronic circuits on paper substrates revealed only a small change in conductance under various folding angles and maintained an electronic path after repetitive folding and unfolding. We also prepared flexible. binder-free graphene paper-like materials by addition of graphene oxide as a film stabilizer. This graphene papers showed outstanding electrical conductivity up to 26,000 S/m and high charge capacity as an anode in lithium-ion battery without any post-treatments. For last case, multi-functional thin film structures of graphene nanoplates were fabricated by using layer-by-layer assembly technique, showing optical transparency, electrical conductivity and enhanced gas barrier property.