不同比例Cr_2O_3对硫正极材料导电性能的影响

Effects of different ratio of Cr_2O_3 on the electrical properties of sulfur anode Materials

解决单质硫导电性问题是提高锂硫电池性能的关键。纳米氧化物不仅能提高硫电极的孔隙度,还能吸附较多硫离子,另外对电池的氧化还原反应起到催化作用。常见纳米氧化物有:SiO2,TiO2,V2O5等。但很少有Cr2O3做添加剂的报道。本研究通过对锂硫电池正极材料单质硫的导电特性进行研究,研究添加不同比例的Cr2O3对单质硫电化学性能的影响,并采用XRD、SEM、粒度分析仪对电池材料物相、颗粒形貌和粒度分布进行表征。利用高精度电池性能分析测试系统等对正极材料、电池进行电性分析。

To solve the sulfur conductive problem is the key to improve the performance of lithium sulfur battery. Nano-oxides not can improve sulfur electrode porosity,but also more adsorbing sulphur ion, as well as plaid a catalytic role for oxidation reduction reaction of battery. Common nano-oxides were SiO2, TiO2, V2O5 etc.. But few reports of Cr2O3 as additive, the thesis through the conductive properties of lithium sulfur battery anode material of elemental sulfur, effects of different adding proportion of Cr2O3 to elemental sulfur electrochemical properties. Battery material phase, particle mor- phology and size distribution were characterized using XRD, SEM and particle size analyzer, the electrical analysis of the an- ode material and battery etc. were carried out using high precision battery performance test system.