排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
Graphene was produced via a soft chemistry synthetic route for lithium ion battery applications. The sample was characterized by X-ray diffraction, nitrogen adsorption-desorption, field emission scanning electron microscopy and transmission electron microscopy, respectively. The electrochemical performances of graphene as anode material were measured by cyclic voltammetry and galvanostatic charge/discharge cycling. The experimental results showed that the graphene possessed a thin wrinkled paper-like morphology and large specific surface area (342 m2·g?1). The first reversible specific capacity of the graphene was as high as 905 mA·h·g?1 at a current density of 100 mA·g?1. Even at a high current density of 1000 or 2000 mA·g?1, the graphene maintained good cycling stability, indicating that it is a promising anode material for high-performance lithium ion batteries. 相似文献
2.
3.
利用球磨法制备了氧化锡(SnO2)/石墨复合材料,采用场发射扫面电镜、X射线衍射和比表面积对样品进行表征,结果显示,SnO2颗粒包裹在石墨片层上,SnO2/石墨复合材料的比表面积为83.90 m2/g。电化学测试结果表明,球磨法制备的SnO2/石墨复合材料首次放、充电容量分别为1 749mA h/g和1 346 mA h/g,在50 mA/g,100 mA/g和500 mA/g电流密度下,循环40次后,该电极可逆放电容量仍然高达432 mA h/g。 相似文献
4.
5.
6.
树脂对向日葵盘果胶液脱色的研究 总被引:1,自引:0,他引:1
比较了6种树脂对向日葵盘果胶液的脱色效果.在静态吸附试验研究的基础上,筛选出效果较好的树脂进行动态试验研究.实验表明:D900型吸附树脂对向日葵盘果胶提取液具有较好的吸附脱色效果和较低的果胶损失率,该树脂对向日葵盘果胶脱色的适宜工艺参数为:室温 (约25℃),流速3.6BV/h,上柱液pH为4左右.此工艺对果胶提取液中色素的吸附率可达84.3%.树脂吸附后可用70%乙醇进行洗涤再生. 相似文献
1