The solvation of the system of C60-toluene is studied by deterndning UV-Vis absorption spectrum, it is found that the maximum absorption wavelength of C60 exhibits red-shift in toluene medium. Viscosity measurement gi...The solvation of the system of C60-toluene is studied by deterndning UV-Vis absorption spectrum, it is found that the maximum absorption wavelength of C60 exhibits red-shift in toluene medium. Viscosity measurement gives the thickness of the solvation layer as 0.85 nm. At temperature 30℃, the value of the diffusion coefficient is 3.12× 10-10m2·s-1 which is an order of magnitude less than that of small molecules. The results above indicate that C60 is solvated in toluene medihm.展开更多
利用共溶剂1,5-戊二醇(PD)和聚乙二醇(PEG)改进13 m(m=[mol盐]/[kg溶剂]质量摩尔浓度)Li OAc作为水系锂离子电池电解液的电化学稳定窗口,研制低成本无氟水系混合溶剂醋酸锂电解液。通过红外吸收和拉曼散射光谱对电解液中水分子的活性进...利用共溶剂1,5-戊二醇(PD)和聚乙二醇(PEG)改进13 m(m=[mol盐]/[kg溶剂]质量摩尔浓度)Li OAc作为水系锂离子电池电解液的电化学稳定窗口,研制低成本无氟水系混合溶剂醋酸锂电解液。通过红外吸收和拉曼散射光谱对电解液中水分子的活性进行表征,结果表明,在混合溶剂电解液中水分子的活性受到抑制。电化学测试表明电解液成分为2 m Li OAcPD0.5PEG0.5时,具有最宽的电化学稳定窗口3.10 V,使Li_(4)Ti_(5)O_(12)负极可进行可逆充放电,最后Li_(4)Ti_(5)O_(12)//Li Mn2O4全电池测试得到初始平台电压为2.3 V,能量密度为0.0616 k Wh/kg,相较于13 m Li OAc电解液具有更高的比容量和循环稳定性。展开更多
文摘The solvation of the system of C60-toluene is studied by deterndning UV-Vis absorption spectrum, it is found that the maximum absorption wavelength of C60 exhibits red-shift in toluene medium. Viscosity measurement gives the thickness of the solvation layer as 0.85 nm. At temperature 30℃, the value of the diffusion coefficient is 3.12× 10-10m2·s-1 which is an order of magnitude less than that of small molecules. The results above indicate that C60 is solvated in toluene medihm.
文摘利用共溶剂1,5-戊二醇(PD)和聚乙二醇(PEG)改进13 m(m=[mol盐]/[kg溶剂]质量摩尔浓度)Li OAc作为水系锂离子电池电解液的电化学稳定窗口,研制低成本无氟水系混合溶剂醋酸锂电解液。通过红外吸收和拉曼散射光谱对电解液中水分子的活性进行表征,结果表明,在混合溶剂电解液中水分子的活性受到抑制。电化学测试表明电解液成分为2 m Li OAcPD0.5PEG0.5时,具有最宽的电化学稳定窗口3.10 V,使Li_(4)Ti_(5)O_(12)负极可进行可逆充放电,最后Li_(4)Ti_(5)O_(12)//Li Mn2O4全电池测试得到初始平台电压为2.3 V,能量密度为0.0616 k Wh/kg,相较于13 m Li OAc电解液具有更高的比容量和循环稳定性。
