摘要
V_6O_(13)用作常温锂蓄电池的阴极,不需要严格的化学计量,易于制取,比能量高,并有优良的充放电循环性能。我们曾对非计量 V_6O_(13)(VO_(2.19))作电池的循环测试,电流密度为1mA/cm^2时,有高而稳定的比容量。Abraham 指出用其它金属取代部分钒的可能性。本文拟用金属 M(Ti、W、Co)取代 V_6O_(13)中一部分 V,合成M_(0∶8)V_(5∶2)O_(13)化合物。用它为阴极材料,装配电池,测试电化学性能,并与计量 V_6O_(13)比较。
In the cathode material of stoichiometric V_6O_(13),Ti,W,Cowere used for substitution of a part of V to systhesize compounds of M_(0∶8)V_(5∶2)O_1.On testing Li/M(0∶8)V(5∶2),O_(13) secondary cell,the cathode material of Co(0∶8)V(5∶2)O_(13)exhibites a good circulation efficiency.The average utilization of the 50 and100 cycles are 43 and 35%,respectively.The main cause of the failure ofthis cell is on account of wastage of Li anode,i.e.electrical isolating Li wasproduced and gradually accumulated during charging.
关键词
锂蓄电池
钴钒氧化物
阴极
Secondary Lithium Battery
Cobalt Vanadium Oxide
