9月9日 16：00  理化大楼9004

 

Abstract

New scientific phenomena and processes that have emerged in the area of nanoscience and nanotechnology could provide either revolutionary or novel solutions to the energy, environmental, and sustainable mobility challenges.As an exciting material, graphene has high intrinsic mobility, high Young’s modulus and thermal conductivity.1 With high optical transmittance and good electrical conductivity, graphene is expected to be close or to beat transitional ITO films, for the application in transparent conductive electrodes.2 The large specific surface area and the flexibility in modification or functionalization of graphene has made it promising in various energy storage systems. Graphene based ultracapacitors have shown performance superior to the conventional activated carbon based ultracapacitors, with improved energy density and power density.3, 4

 

Furthermore, other novel carbon structures or composite materials can be fabricated from graphene materials. By chemically activating graphene material, a novel carbon has been synthesized with a very high surface area of up to 3100 m2/g and a high electrical conductivity simultaneously.5 Built based on this carbon and ionic liquid electrolytes, the ultracapacitors have demonstrated 4-5 times higher of gravimetric energy stored and one order higher of power density than the commercial activated carbon ultracapacitors. As an electrically conducting and chemically stable matrix, graphene could also act as an excellent platform/medium for other electrically and/or chemically active materials such as metals, polymers, semiconductors and metal oxides for the applications in fuel cells, hydrogen storage, batteries and so on.

 

References:

1.Zhu, Y.; Murali, S.; Cai, W.; Li, X.; Suk, J. W.; Potts, J. R.; Ruoff, R. S., Advanced Materials 2010, 22 (35), 3906-3924.

2.Li, X.; Zhu, Y.; Cai, W.; Borysiak, M.; Han, B.; Chen, D.; Piner, R. D.; Colombo, L.; Ruoff, R. S., Nano Letters 2009, 9, 4359-4363.

3.Stoller, M. D.; Park, S. J.; Zhu, Y. W.; An, J. H.; Ruoff, R. S., Nano Letters 2008, 8 (10), 3498-3502.

4.Zhu, Y.; Stoller, M. D.; Cai, W.; Velamakanni, A.; Piner, R. D.; Chen, D.; Ruoff, R. S., ACS Nano 2010, 4 (2), 1227-1233.

5.Zhu, Y.; Murali, S.; Stoller, M. D.; Ganesh, K. J.; Cai, W.; Ferreira, P. J.; Pirkle, A.; Wallace, R. M.; Cychosz, K. A.; Thommes, M.; Su, D.; Stach, E. A.; Ruoff, R. S., Science 2011, 332 (6037), 1537-1541.

 

朱彦武教授简介：

 

朱彦武博士今年8月加入中国科技大学材料科学与工程系。他分别在国防科技大学、北京大学和新加坡国立大学获得物理学学士、硕士和博士学位，并曾在新加坡国立大学纳米科技启动项目和美国得州大学奥斯丁分校进行博士后研究，较早开始了应用石墨烯作为透明电极和超级电容器电极材料的基础研究。朱教授在纳米材料与技术、应用物理和应用化学等领域顶级期刊发表论文近80篇，已被引用超过2300次。