摘要
采用不同化学计量比的单质硫和五氧化二钒合成复合材料,应用XRD和SEM表征观察硫-五氧化二钒复合材料,循环伏安、交流阻抗和电池充放电测试材料的电化学性能。结果表明:n(S)∶n(V2O5)为5∶1时具有较好的电化学性能,首次放电比容量为396.7 mAh·g-1,以0.1 C倍率循环20次后的容量为350 mAh·g-1。
A composite is synthesized by heating different stoichiometric mixture of element sulfur（S）and vanadium pentoxide（V2O5）.The sulfur-vanadium pentoxide composites are characterized by X-ray diffraction and SEM.The electrochemical property is characterized by cyclic voltammetry（CV）,A.C.impedance and constant current charge and discharge.It reveals that n（S）∶n（V2O5） at 5∶1 stoichiometric mixture exhibite a good electrochemical property with initial discharge capacity up to 396.7 mAh·g-1 after 20 cycles.
出处
《桂林理工大学学报》
CAS
北大核心
2011年第1期115-117,共3页
Journal of Guilin University of Technology
基金
广西自然科学基金项目(桂科基0991025)
关键词
锂硫二次电池
单质硫
五氧化二钒
复合材料
lithium/sulfur rechargeable battery
element sulfur
vanadium pentoxide
composite material
