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LITHIUM AND VANDIUM OXIDE Li1+ V3O8 (0,1 0,25) METHOD FOR THE PREPARATION THEREOF
LITHIUM AND VANDIUM OXIDE Li1+ V3O8 (0,1 0,25) METHOD FOR THE PREPARATION THEREOF
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机译:锂和钒氧化物Li1 + V3O8(0,1 0,25)的制备方法
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摘要
The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+alphaV3O8 (0.1@alpha@0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10l/w100 and a thickness t such that 10l/t100. It is obtained by a process consisting in preparing a precursor gel by bringing alpha-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.
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机译:锂钒氧化物技术领域本发明涉及一种锂钒氧化物,其对应于式Li 1 + alphaV 3 O 8(0.1 @ alpha @ 0.25)。它由小针的附聚物组成,所述小针的附聚物的长度l为400至1000nm,宽度w使得10 <l / w <100,并且厚度t使得10 <l / t <100。它是通过以下方法获得的,该方法包括通过使α-V2O5与Li前体接触以使其浓度[V2O5] / [Li]之比在1.15至1.5之间并使该凝胶经受热处理,包括在氮气或氩气气氛下,第一阶段在80°C-150°C下进行3小时至15天,第二阶段在250°C至350°C之间进行4分钟至1小时。 。用作正极的活性材料。
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