欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用优化合成的高比表面积和多微孔结构的活性炭，通过加热的方法使单质硫升华并沉积到活性炭微孔中，得到锂硫电池正极用硫碳复合材料．通过X射线衍射、扫描电子显微镜和比表面积表征复合材料的结构、表面形貌和比表面特性．循环伏安测试表明，复合材料在2．05V和2．35V时存在两个还原峰，在2．4V时存在一个氧化峰．充放电循环实验表明，单质硫在100mA·g^-1的电流密度下首次放电比容量高达1352．5mA·h·g^-1，硫的利用率达到了80．9％．循环40周后比容量还保持在800．7mA·h·g^-1，表现出良好的循环稳定性．
英文摘要：
Sulfur-carbon composites as cathode for lithium-sulfur battery have been synthesized by heating a mixture of elemental sulfur and activated carbon with high specific surface area and microporous structure. The physical structure performance is characterized by X-ray diffraction, scanning electron microscopy and specific surface area measurements. It show two reduction peaks at 2.05 V and 2.35 V, one oxidation peak at 2.4 V during cyclic vohammogram test. The charge-discharge experiment indicates that its initial discharge specific capacity is 1 352.5mA. h· g^-1 at a current density of 100 mA · g^-1. The utilization of electrochemically active sulfur is about 80.9%. The specific capacity still keep as high as 800.7 mA · h · g ^-1 after 40 cycles which show good cycle stability.
同期刊论文项目
同项目期刊论文
SnO2-based composite coaxial nanocables with multi-walled carbon nanotube and polypyrrole as anode m
Insight into the improvement of rate capability and cyclability in LiFePO(4)/polyaniline composite c
Significant Improved Electrochemical Performance of Spinel LiMn(2)O(4) Promoted by FePO(4) Incorpora
期刊信息
位置：