Facile ultrasonic synthesis of CoO/graphene nanohybrids as high performance anode materials for lithium ion batteries
A facial ultrasonic method was used to synthesize CoO/Graphene nanohybirds by employing Co4(Co)12 as cobalt precusor.The nanohybrids were characterized by SEM,TEM and XPS,showing that CoO nanoparticles (3~5 nm) anchored on the surface of graphene with high dispersity.The CoO/graphene nanohybrids displayed high performance as an anode material for lithium-ion battery,such as high reversible lithium srorage capacity (7716 mAh g-1 after 50cycles,twice of that of commercial graphite anode),high Coulombic efficiency (over 95%) and excellent cycling stability.The extraordinary performance arises from the structure merits of the nanohybrids:the nanosized CoO particles with high dispersity on conductive graphene substrates are beneficial for lithium-ion insertion/extraction,shortening diffusion length for lithium ions and good conductivity,thus improved the lithium storage performance.Moreover,the ultrasonic method can be chosen as a general route to prepare other metal oxides/graphite hybrid materials.
Ultrasonic graphene CoO lithium-ion battery anode materials
Chen Bingdi Peng Chengxin
The Institute for Advanced Materials & Nano Biomedicine, College of Medicine, Tongji University,Shan The Institute for Advanced Materials & Nano Biomedicine, College of Medicine, Tongji University,Shan
国际会议
上海
英文
159-159
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）