摘要
针对锂硫电池研究与实际应用中遇到的主要问题,本文通过一种简单有效的水热法还原氧化石墨烯对商用碳纳米管-硫(CNT-S)纳米复合材料进行包覆,形成一种可有效抑制多硫聚合物扩散的石墨烯包覆结构。X射线衍射(XRD),扫描电子显微镜(SEM)表征结果表明硫均匀地负载在碳纳米管上,并且在CNT-S复合材料外表面包覆有一层石墨烯。电化学测试结果表明,这种包覆结构能显著提高CNT-S复合材料的锂硫电池性能。
To solve the main problems encountered in the lithium-sulfur battery research and practical application, a simple and effective hydrothermal reduction of graphene oxide was employed to encapsulate commercial carbon nanotube-sulfur （CNT-S） nanocomposite in this study, then an effective type of graphene coated CNT-S nanostructure was formed. The polysulphide anions diffusion phenomenon was effectively restrained by the graphene coating structure. The nanocomposites were characterized by X-ray diffraction and scanning electron microscope. The results indicated that elemental sulfur was uniformly distributed across the CNT, and a layer of graphene coated on the surface of CNT-S nanocomposite. The electrochemical test results showed that the graphene coating nanostructure obviously improved the lithium-sulfur battery performance of the CNT-S nanocomposite.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2013年第7期1355-1360,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.51202106
No.51172109)
江苏省自然科学基金(No.BK2010497)资助项目
关键词
石墨烯
锂硫电池
碳纳米管
硫
graphene
lithium-sulfur battery
carbon nanotube
sulfur
