应用化学 ›› 1992, Vol. 0 ›› Issue (5): 80-83.
• 研究简报 • 上一篇 下一篇
华寿南, 姜能座
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Hua Shounan, Jiang Nengzuo
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摘要： 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),Li1+xV3O8,TiS2,MoS2等被认为是较好的正极材料[1]。Pistoia等[2,3]研究了Li1+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变差,Li+-Li+之间的斥力增强,影响了Li+干在主体材料中的插入。在高L军V比的情况下,钒青铜的电化学行为尚未见报导。本文研究了高Li/V比的富铿钒青铜的合成及其在二次锂电池中的电化学行为。
关键词: 钒青铜, 二次锂电池, 锂插入反应, 交流阻抗谱
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.
Key words: vanadium bronze, secondary lithium battery, lithium insertion reaction, AC impedance
华寿南, 姜能座. Li/富锂钒青铜(Li6V5O15)二次电池正极材料研究[J]. 应用化学, 1992, 0(5): 80-83.
Hua Shounan, Jiang Nengzuo. VANADIUM BRONZE RICH IN LITHIUM AS POSITIVE MATERIAL FOR SECONDARY LITHIUM BATTERY[J]. Chinese Journal of Applied Chemistry, 1992, 0(5): 80-83.
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http://yyhx.ciac.jl.cn/CN/Y1992/V0/I5/80
