【摘要】 采用固相烧结法合成了同时掺杂氟离子和钴离子、具有单斜LiV3O8型结构的锂钒氧化物样品.通过充放电循环实验、循环伏安实验、XRD衍射和热分析对材料的理化性能进行了表征.实验结果表明,理论组成为Li1.38V2.99Co0.01O7.98F0.02的样品的首次放电容量为233 mA.h/g,40次循环的放电容量为192 mA.h/g.在充放电过程中,同时掺氟和钴的样品的放电平台电压较高,表现出较好的循环性能.更多还原

【Abstract】 A monoclinic LiV₃O₈ co-doped with F and Co ions was prepared by a solid-state sintering method.The tests doped samples was characterized by charge-discharge,cyclic voltammetry,XRD and thermal analysis.The charge-discharge results showed that F and Co co-doping can improve discharged platform and discharged capacities.The sample with a theoretic composition of Li_1.4V_2.99Co_0.01O_7.98F_0.02 has a capacity of 233?mA·h/g in the 1st cycle,and 192?mA·h/g in the 40th cycle.The doped sample showed good cyclability with high voltage platform in the charge-discharge process.更多还原