Biosynthesis and electrochemical characteristics of LiFePO₄/C by microwave processing

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• 作者：Weijia Zhou ; Wen He ; Zhengmao Li ; Hongshi Zhao and Shunpu Yan
• 关键词：Composite materials ; Chemical synthesis ; Microstructure ; Electrochemical properties
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2009
• 出版时间：December, 2009
• 年：2009
• 卷：13
• 期：12
• 页码：1819-1823
• 全文大小：188.7 KB

文摘

The yeast cells are adopted as a template and cementation agent to prepare LiFePO₄/C with high surface area by co-precipitation and microwave processing. The electrochemical properties of the resultant products are investigated. The synthesized LiFePO₄/C is characterized by means of X-ray diffraction, transmission electron microscopy (TEM), Brunauer–Emmett–Teller method, and battery test instrument. The LiFePO₄/C particles with average size of 35-100 nm coated by porous carbon are observed by TEM. The LiFePO₄/C, with the specific surface area of 98.3 m2/g, exhibits initial discharge specific capacity of 147 mAh/g and good cycle ability. The yeast cells as a template are used to synthesize the precursor LiFePO₄/cells compounds. In microwave heating process, the use of yeast cells as reducing matter and cementation agent results in the enhancement of the electrochemical properties.