FeF3/Ordered Mesoporous Carbon (OMC) Nanocomposites for Lithium Ion Batteries with Enhanced Electrochemical Performance

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• 作者：Hyeyun Jung ; Jihyun Shin ; Changju Chae ; Jung Kyoo Lee ; Jongsik Kim
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：July 25, 2013
• 年：2013
• 卷：117
• 期：29
• 页码：14939-14946
• 全文大小：537K
• 年卷期：v.117,no.29(July 25, 2013)
• ISSN：1932-7455

文摘

FeF₃ is of great interest as a potential candidate cathode material because of its low cost, abundance, environmental friendliness, and high theoretical capacity of about 237 mAh路g^鈥? in the voltage range of 2.0鈥?.5 V. However, FeF₃ has drawbacks of poor cycling stability and rate performance because of its low intrinsic electrical conductivity and slow diffusion of lithium ions. These issues should be improved for the practical application of FeF₃ in lithium-ion battery systems. In this study, FeF₃/ordered mesoporous carbon (OMC) nanocomposites were synthesized by an incipient-wetness impregnation technique in a facile and scalable method. The tubular shaped OMC was utilized as both a conductive agent and a hard template for the formation of nanosized FeF₃ particles. The FeF₃/OMC nanocomposites showed enhanced capacity, cycling stability, and rate performance compared to bulk FeF₃ in the voltage range of 2.0鈥?.5 V at room temperature.