Morphology Control of Electrode Materials for Li Batteries through Sol-Gel Technique
It is well known that the transport characteristics of insertion materials are dependent from their crystal structure as well as their particles size, crystallinity, shape, texture and orientation towards each other (we will refer these parameters as material form-factor below). Thus the heterogeneous systems could be investigated from the point of view a relationship between their insertion properties and structure parameters. The layered lithium vanadium oxide Li1+xV3O8 having high structural stability against the cyclic change of penetrated lithium concentration (De Picciotto et al., 1993) has been chosen as model object to reveal the correlation between material morphology and crystal structure and its electrochemical performance. Variation of unit cell parameters of origin Li1+xV3O8 was performed by partial substitution of vanadium by larger Mo6+ cations. To change the material form-factor, Li1+xV3O8 and Li1+xMoyV3-yOy (0<y<0.25) have been synthesized by sol-gel technique from metal alkoxides solutions.
KeywordsElectrochemical Performance Passive Film High Structural Stability Hydrolysis Ratio Alkoxide Solution
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