Citation:
	            
		            HU  Guo-Rong, CAO  Yan-Bing, PENG  Zhong-Dong, DU  Ke, JIANG  Qing-Lai. Preparation of Li2FeSiO4 Cathode Material for Lithium-Ion Batteries by Microwave Synthesis[J]. Acta Physico-Chimica Sinica,
							;2009, 25(05): 1004-1008.
						
							doi:
								10.3866/PKU.WHXB20090418
						
					
				
					
				
	        
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We report a novel synthetic route for the preparation of the Li2FeSiO4 cathode material by microwave processing. The Li2FeSiO4 material was synthesized using mechanical ball-milling and subsequent microwave processing. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical methods. Properties of the prepared materials and electrochemical characteristics of the samples were investigated and compared to samples prepared by the conventional solid-state reaction. The obtained results indicated that highly pure Li2FeSiO4 material with uniform and fine particle size was quickly and successfully synthesized by microwave (MW) heating at 650 ℃ for 12 min. This compound showed high specific capacity and od cycle ability. The initial discharge capacity of the sample obtained by MW heating delivered 119.5 mAh·g-1 at 60 ℃ at a current density of C/20 rate (1C=160 mA·g-1). After 10 cycles the discharge capacity maintained 116.2 mAh·g-1. The Li2FeSiO4 material displayed higher phase purity, better microstructure, and better electrochemical properties than the sample prepared by the conventional solid-state method.
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								Keywords:
								
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Li-ion battery
, - Cathode material,
 - Li2FeSiO4,
 - Microwave synthesis
 
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