Production of thin graphite sheets for a high electrical conductivity film by the mechanical delamination of ternary graphite intercalation compounds
Production of thin graphite sheets for a high electrical conductivity film by the mechanical delamination of ternary graphite intercalation compounds
复制标题
通过三元石墨插层化合物的机械分层生产用于高导电率薄膜的薄石墨片
DOI：
10.1016/j.carbon.2012.06.032
复制
发表时间：
2012
期刊：
影响因子：
10.9
通讯作者：
Y. Kuga
中科院分区：
文献类型：
--
作者：
S. Yamanaka;T. Nishino;T. Fujimoto;Y. Kuga
在此，我们提出了一种生产方案的导电膜组成的薄石墨片具有高结晶度和聚合物树脂。以天然石墨粉为原料，采用湿行星球磨法，在温和条件下，通过液相合成石墨层间化合物（GIC），成功制备出了结晶石墨片。研磨罐中的剪切力导致石墨薄片的剥离。考虑到层间结合力，分层应优先从膨胀的GIC层而不是本征石墨层进行。与来自进料石墨颗粒的膜相比，来自酚醛树脂和石墨片的一些复合膜显示出高得多的电导率。我们还证明了合成GIC的阶段结构影响膜的导电性。由研磨（约第IV阶段）GIC的剥离产物制成的复合膜具有高电导率和少量的石墨片。
Herein we propose a production scheme for conductive films composed of thin graphite sheets with high crystallinity and polymeric resin. The crystalline graphite sheets were successfully produced from natural graphite powder by solution-phase synthesis of graphite intercalation compounds (GICs), following a wet planetary-ball milling under mild conditions. The shear forces in the milling pot lead to a peeling of graphite flakes. Taking into consideration the interlayer bonding force, the delamination should be preferentially done from the expanded GICs interlayer rather than intrinsic graphite one. Some composite films derived from the phenolic resin and flaky graphite sheets displayed much higher electrical conductivities compared to the film from the feed graphite particles. We also demonstrate the stage structure of synthetic GICs affected the film conductivity. The composite films made from exfoliated products of ground (around stage IV) GICs exhibited high electrical conductivity with a small amount of the graphite sheets.