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学术报告:Titanium oxide/oxynitride on carbon nanotubes for energy storage materials

来源:球探体育比分老版本 发布者:系统管理员发布时间:2016-03-10浏览次数:192

报告题目:Titanium oxide/oxynitride on carbon nanotubes for energy storage
materials
报 告 人: Litao Yan, New Mexico State University
报告时间:2016年3月18日(周五)下午3:00
报告地点:物理科技楼237
报告摘要:The controllable synthesis of strongly coupled inorganic materials/carbon nanotubes hybrids represents a long-standing challenge for developing advanced catalysts and energy-storage materials. Here we report a simple hydrolysis method for facile synthesis of TiO2/carbon nanotubes (CNTs) hybrid. The porous anatase TiO2 nanoparticles are uniformly coated on the CNT conducting network, which leads to remarkably improved electrochemical performances such as exceptional cycling stability, good high rate durability, and reduced resistance. This hybrid exhibits a reversible capacity as high as 200 mA?h g-1 at a current density of 0.1 A g-1 as an anode in lithium-ion battery (LIB). As a supercapacitor (SC), it shows a specific supercapacitance of 145 F g?1 in 0.5 M H2SO4 electrolyte, higher than that of the previously reported TiO2 based supercapacitors. Moreover, this hybrid also exhibits excellent durability after 1000 cycles for both LIBs and SCs. After using ammonia gas to active the TiO2/Carbon Nanotubes, doping nitrogen into CNTs and converting insulator TiO2 layer to conductive Titanium oxynirtides nanoparticles could significantly increase the charge transfer, resulting in the enhanced supercapacitance.
个人简介:Litao Yan is a Ph.D. candidate in Chemical and Materials Engineering at New Mexico State University and Soochow University. He received His BSc in Materials Physics from Lanzhou University (LZU) in 2007 and MSc in Materials Science from University of Science and Technology of China (USTC) in 2010, respectively. His research focused on lithium ion battery, supercapacitor, ceramic membrane and fuel cells. He authored and co- authored more than 30 papers on energy storage materials.