Synthesis of LiV3O8 Crystallites via an Improved Citric Acid Assisted Sol-Gel Method

Dun Qiang Wang; Li Yun Cao; Jian Feng Huang; Jian Peng Wu

doi:10.4028/www.scientific.net/KEM.512-515.227

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Synthesis of LiV3O8 Crystallites via an Improved...

Synthesis of LiV₃O₈ Crystallites via an Improved Citric Acid Assisted Sol-Gel Method

Abstract:

Lithium trivanadate (LiV₃O₈) powders have many attractive characteristics such as high specific energy density, good rate capacity and long cycle life due to their unique crystal structure and outstanding structure stability as cathode material for rechargeable lithium batteries. LiV₃O₈ crystallites were synthesized under different conditions via a combined ultrasonic irradiation and sol-gel method. The as-prepared LiV₃O₈ powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) absorption spectra. The thermal decomposition process was investigated using thermogravimetric (TG) and differential scanning calorimetry (DSC). The effects of molar ratios of metal ion/citric acid and calcinations temperature on phases and microstructure of the powders were investigated. Results indicate that calcinations temperatures have significant influence on the particle morphology, particle size and particle size distribution of the powders. The pure and rod-like LiV₃O₈ powders with an average size of 0.2-1 μm are obtained at 350 and 400 °C. With the increase of calcinations temperature, the powders exhibit preferred growth orientation along (100) planes. The crystallites obtained at 550 and 600 °C are composed by LiV₃O₈ with a small amount of Li_0.3V₂O₅ phase, both of which exhibit tabular morphologies with an average size of 2-10 μm.

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Key Engineering Materials (Volumes 512-515)

Pages:

227-230

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.227

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Online since:

June 2012

Authors:

Dun Qiang Wang, Li Yun Cao, Jian Feng Huang, Jian Peng Wu

Keywords:

Lithium Trivanadate, Morpholoy, Sol-Gel Process, Structure, Ultrasonic Irradiation

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