报告题目：Title: Carbon-based Nanocomposite Materials for High Energy Density Rechargeable Batteries
报告人：张跃钢研究员
报告时间：2013年1月18日（周五）下午15：00
报告地点：曹光彪大楼326室
邀请人：金传洪
报告人简介：中科院苏州纳米技术与纳米仿真研究所研究员。张跃钢研究员分别获得清华大学物理专业学士／硕士，东京大学材料科学专业博士学位，现任中科院苏州纳米技术与纳米仿生研究所国际实验室主任。曾任美国伯克利国家实验室终身研究员，美国Intel 公司高级研究员，日本NEC公司研究员，美国斯坦福大学博士后研究员。主要研究方向为碳与半导体纳米材料合成及结构表征、纳米电子器件研究及能源储存技术。在Science、J.Am.Chem.Soc.、Phys.Rev.Lett.、Nano Lett. 等期刊发表论文70余篇；授权专利20余项。曾获英特尔公司器件研究部门奖、英特尔公司SRC 指导项目奖、日本学术振兴会特别研究员奖学金及日本金属学会暨国际先进材料与技术研讨会优秀展示奖等奖项。作为国际半导体技术规划的新器件及新材料工作组成员，参与 ITRS 文件撰写。首次合成了纳米同轴电缆结构，并实现了碳纳米管纳米异质结；首创用化学气相沉积法直接在介电基底上形成单层石墨烯薄膜。另外，近期在高能量锂电池方面的研究也取得突出成果，被MIT Technology Review等科技媒体广泛报道。
报告摘要：Development of advanced electrochemical battery system is required to meet the increasing demands for large-scale electrical energy storage. For the electrode materials of lithium ion batteries, silicon, tin, and some transition metal oxides are well known as high-capacity anode materials. However, these materials suffer from huge volume change during charge and discharge, which leads to poor cycling performance. On the cathode side, sulfur is one of the most promising cathode materials with a high theoretical capacity of about 1675 mAh g-1. However, the current lithium-sulfur cells suffer from the low electronic conductivity of sulfur electrodes and the high solubility of long chain polysulfide ions in organic solvent-based electrolytes. To solve these problems, we designed and fabricated electrochemically active nanocomposite materials by using novel carbon nanostructures, such as graphene, graphene oxides, and porous carbon nanofibers, as matrices. The new nanocomposite anodes (such as graphene-Si, graphene-Sn, graphene-Fe3O4, etc) and cathodes (such as graphene oxide-sulfur, porous carbon nanofiber-sulfur, carbon-Li2S, etc.) enabled us to significantly improve the specific capacities, charge/discharge rates, and cycle lives in rechargeable lithium batteries.
报告摘要：Development of advanced electrochemical battery system is required to meet the increasing demands for large-scale electrical energy storage. For the electrode materials of lithium ion batteries, silicon, tin, and some transition metal oxides are well known as high-capacity anode materials. However, these materials suffer from huge volume change during charge and discharge, which leads to poor cycling performance. On the cathode side, sulfur is one of the most promising cathode materials with a high theoretical capacity of about 1675 mAh g-1. However, the current lithium-sulfur cells suffer from the low electronic conductivity of sulfur electrodes and the high solubility of long chain polysulfide ions in organic solvent-based electrolytes. To solve these problems, we designed and fabricated electrochemically active nanocomposite materials by using novel carbon nanostructures, such as graphene, graphene oxides, and porous carbon nanofibers, as matrices. The new nanocomposite anodes (such as graphene-Si, graphene-Sn, graphene-Fe3O4, etc) and cathodes (such as graphene oxide-sulfur, porous carbon nanofiber-sulfur, carbon-Li2S, etc.) enabled us to significantly improve the specific capacities, charge/discharge rates, and cycle lives in rechargeable lithium batteries.
浙江大学电镜中心
2013年1月15日
