【摘要】 <正> 近年来,人们对二次锂电池的正极进行了不少研究。许多过渡金属氧化物或硫化物,如V₆O（13）,Li_1+xV₃O₈,TiS₂,MoS₂等被认为是较好的正极材料。Pistoia等研究了Li_1+xV₃O₈钒青铜的电化学性能得出,当Li浓度高时,由于电子定域作用使电荷屏蔽效应更多还原

【Abstract】 Vanadium bronze rich in lithium(Li₆V₅O₁₅)was prepared from Li₂CO₃ and V₂O₅ at 680℃. The charge-discharge behaviour of the bronze electrode was investigated in LiAsF₆-PC electrolyte at various current densities.Li/bronze cell showed a high specific capacity, and more than 340Ah/kg was obtained at 0.2mA/cm² and 1.0V cut-off voltage. The X-ray diffraction results showed that the structure of the new bronze was stable for lithium insertion.AC impedance data of Li/bronze cell showed that the cathodic process was mainly controlled by diffusion of Li in the bronze.更多还原