| 학회 | 한국공업화학회 |
| 학술대회 | 2010년 가을 (10/27 ~ 10/29, 대전컨벤션센터) |
| 권호 | 14권 2호 |
| 발표분야 | Dongjin Lecture |
| 제목 | Graphene Nanoplatelets: A Multifunctional Material for Nanocomposites, Energyand Thermal Management Applications |
| 초록 | The graphene structure of carbon is largely responsible for the unprecedentedhigh level of intrinsic mechanical, electrical and thermal properties obtained in carbon nanotubes (CNTs).While the tubular graphene structure in the CNT is synthesized from a ‘bottom-up’ approach, graphene itself can be inexpensively and efficiently extracted in nanoplatelet morphology by a ‘top-down’ approach using common chemicals starting with mineralogical graphite with properties competitive to CNTs.Nanocomposites for energy storage, generation and thermal management require these nanomaterials to not only be dispersed but also to be structured in 2D and 3D nanostructures in order to achieve high performance macro devices and applications. Several synthesis and nanostructuring processes have been developed at MSU to utilize the unique properties of graphene nanoplatelets including a simple, economical process for top-down synthesis of exfoliated graphite nanoplatelets (xGnP) from natural graphite with thicknesses less than 5 nm and diameters ranging from sub-micron to 100 microns; a process to synthesize metal and semiconductor nanoparticles such as Pt, Pd, Ru, etc. with sizes in the range of ~1 nm to ~10 nm fixed permanently onto the basal surfaces of graphene sheets at controllable surface concentrations up to 70%; and a process for self-assembly of graphene nanoplatelets into thin transparent, conductive films equal in properties to ITO.When combined with polymers at concentrations of only a few percent, The resulting nanocomposites have substantial improved mechanical properties; electrical conductivity increases of ~10 orders of magnitude; thermal conductivity increases of ~100X; barrier properties by factors of 5-10; and reduced flammability.Potential applications include components of fuel cells, lithium ion batteries, solar cells and supercapacitors among others.Examples with performance metrics and future challenges with using these nanostructured graphene materials for supercapacitors, batteries, solar cells and composite structures will be presented and discussed. |
| 저자 | Lawrence T. Drzal |
| 소속 | Michigan State Univ. |
| 키워드 | graphene; multifunctional; nanocomposite |
