成会明,工学博士,现为中科院金属研究所研究员,沈阳材料科学国家(联合)实验室先进炭材料研究部主任。1984年毕业于湖南大学化工系,1987年、1992年在中科院金属研究所获硕士和博士学位。1990年至1993年在日本通产省工技院九州工业技术研究所和日本国立长崎大学工作,1997年至1998年在美国麻省理工学院作高级访问学者。
成博士主要从事碳纳米管、石墨烯、能量转换材料、高性能石墨材料等研究。编撰出版中国第一部关于碳纳米的专著,在Nature, Nature Mater., Nature Commun., PNAS, Adv. Mater., JACS, Angew. Chemie, Adv. Funct. Mater., Adv. Energy Mater., ACS Nano, J. Mater. Chem., Carbon等期刊上发表了400多篇文章。他曾获得2006年国家自然科学二等奖、2010年美国Charles E. Pettinos奖、2010年何梁何利科技进步奖等奖励。2000年被聘为国际刊物《Carbon》副主编、1998年被聘为《新型炭材料》主编。成博士是碳系列国际会议国际顾问委员、2002年(北京)和2011年(上海)碳国际会议共同主席。在国际会议上做特邀报告约70多次。成博士是2012年南洋理工大学TCT奖获得者,并担任澳大利亚昆士兰大学名誉教授及国内高校的客座教授。2013年当选为中国科学院院士。2014年10月26日,发展中国家科学院(TWAS)第25届院士大会在阿曼首都马斯喀特开幕,成会明院士在此届大会上被增选为第三世界科学院院士。
演讲题目:Graphene materials for clean energy applications
内容摘要
Graphene materials attract increasing interest in clean energy applications, such as solar cells, supercapacitors, lithium ion batteries, Li-S batteries, and OLED devices.
For supercapacitors and lithium ion batteries, it is found that graphene composites have a significant improvement in their capacity, rate capability and cycling stability. The roles of graphene are found mainly to form a conductive network, increase electron and lithium ion conductivity, and anchor and trap electrode materials, and their efficiency is dependent upon how strong the interaction between graphene and electrode materials is.
Graphene materials can be used in Li-S batteries. A unique sandwich structure with pure sulfur sandwiched between two graphene membranes was designed for a Li-S battery to trap polysulfides. Furthermore, a graphene membrane was used as both current collector and buffer layer on a polymer separator. These batteries show significant improvement in cyclability and capacity, because the electrode with the graphene membrane can provide rapid ion and electron transport paths, accommodate sulfur volumetric expansion, and store and reuse migrated polysulfides to alleviate the shuttling effect. By incorporating a graphene foam (GF) fabricated by template-directed CVD with reduced graphene oxide aerogel, a three-dimensional hybrid nested hierarchic graphene macrostructure was used as a current collector to solve the low sulfur loading and sulfur content issues of Li-S batteries.
Graphene materials can also be widely used in flexible energy storage devices. For example, a graphene/PANi composite membrane is good electrode material for flexible supercapacitors; by coating active materials on GF, an anode and cathode were made to assemble a thin, lightweight and flexible lithium ion battery and Li-S battery, which show high rate capability and capacity, and excellent flexibility.
Finally, high-quality graphene transparent conducting films by CVD can be used as transparent electrode to assemble flexible OLEDs with excellent performance.