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Research on the Synthesis and Properties of Cathode Materials LiFePO4/C

Author: YuChuan
Tutor: YangShaoBin
School: Liaoning Technical University
Course: Materials Science
Keywords: Lithium ion battery Cathode material Olivine-type lithium iron phosphate Carbothermal reduction method
CLC: TM912
Type: Master's thesis
Year: 2008
Downloads: 111
Quote: 0
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Abstract


Lithium iron phosphate (LiFePO4) because of its high theoretical specific capacity ( 170mAh / g ) , the voltage is approximately 3.5V , better at room temperature and high temperature stability , low cost and excellent environmental performance , a new generation of power lithium ion batteries the most promising cathode material . However , due to the inherent limitations of the crystal structure , LiFePO4 has a lower rate of ion and electron diffusion , which has become the biggest obstacle to limit its application . Modification of their own shortcomings , lithium iron phosphate added carbon source approach is to add a single carbon source and carbon source of two-component raw material system , to explore carbon and iron phosphate lithium composites and performance . XRD, SEM, TG-DSC and charge-discharge testing method to test the characterization of the structure and properties of materials . The research results show that the sample electrical properties of the two - carbon source carbothermal reduction synthesis has improved significantly better than divalent molysite system samples the electrical properties of the material in high-current , the incorporation of the two-component carbon sources , improve material electrical properties.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Battery
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