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Synthesis And Property Study Of Pillared Layered Li1-2xMxCoO2 Electrode Materials For Lithium Ion Batteries

Posted on:2006-12-16Degree:MasterType:Thesis
Country:ChinaCandidate:X M LiFull Text:PDF
GTID:2121360155961537Subject:Applied Chemistry
Abstract/Summary:PDF Full Text Request
LiCoO2 is the preferred material in majority of the commercial cells in view of its high reversibility and theoretical capacity. But the practice capacity and anti-overcharge ability of LiCoO2 are poor. It is possible due to structural degradation with the extent of deintercalation of lithium to 0.5. We introduce M2+ (M=Ca2+, Mg2+, Cd2+) into the interlayer galleries in the LiCoO2 system in order to hold back structural degradation under overcharge. In the end , we obtain the pillared layered Li1-2xMxCoO2 (M=Ca2+, Mg2+, Cd2+) electrode materials.In this paper, we have prepared LiCoO2 precursor by citric acid sol-gel method. The pillared layered Li1-2xMxCoO2 (M=Ca2+, Mg2+, Cd2+) electrode materials have been obtained for the first time by an ion exchange reaction. We have optimized the tecnics and chosen the best solution, reation time and temperature. With calcinations method, we have...
Keywords/Search Tags:lithium ion battery, electrode material, pillared layered structure, cyclic voltammetry
PDF Full Text Request
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