Synthesis,Characterization and Properties of LiFePO_4/C Cathode Material |
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作者姓名: | ZHOU Xin-wen~ ZHAN Dan~ WANG Li-na~ LIU Qiao-yun~ ZONG Hong-xing~ ZHANG Ke-li~ . College of Chemistry and Molecular Sciences Wuhan University Wuhan Hubei China . Center of Nanoscience and Nanotechnology Research Wuhan University Wuhan Hubei China |
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作者单位: | ZHOU Xin-wen~1,ZHAN Dan~1,WANG Li-na~1,LIU Qiao-yun~1,ZONG Hong-xing~1,ZHANG Ke-li~1,2 1. College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,Hubei,China; 2. Center of Nanoscience and Nanotechnology Research,Wuhan University,Wuhan 430072,Hubei,China |
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基金项目: | SupportedbytheNationalNaturalScienceFoundationofChina(20071026) |
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摘 要: | 0Introduction SincePadhietal1]foundlithiumironphosphate(LiFe PO4)couldbeusedascathodematerialforthelithiumionbatteries,manyresearchgroupshavebeendevotedtoim provingtheperformanceofthismaterial26].Theythought thatLiFePO4isoneofthemostpromisingcathodemate…
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Synthesis,Characterization and Properties of LiFePO_4/C Cathode Material |
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Abstract: | Lithium iron phosphate coated with carbon (LiFePO_4/C) was synthesized by improved solid-state reaction using comparatively lower temperature and fewer sintering time. The carbon came from citric acid, which acted as a new carbon source. It was characterized by thermogravimetry and differential thermal analysis (TG/DTA), X ray diffractometer (XRD), Element Analysis (EA) and Scanning electron microscope (SEM). We also studied the electrochemical properties of the material. The first discharge capacity of the LiFePO_4/C is 121 mAh\5g~-1 at 10 mA\5g~-1 at room temperature. When the current density increased to 100 mA\5g~-1, the first discharge capacity decreased to 110 mAh\5g~-1 and retained 95% of the initial capacity after 100 cycles. The LiFePO_4/C obtained shows a good electrochemical capacity and cycle ability at a large current density. |
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Keywords: | lithium ion battery cathode material lithium iron phosphate rheological phase reaction |
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