Ammonia-treatment assisted fully encapsulation of Fe203 nanoparticles in mesoporous carbons as stable anodes for lithium ion batteries

To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe203 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area （〉1700 m2.g-1） and large pore volume （〉1.8 cm3-g-1）. Fine Fe203 nanopartic...

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Bibliographic Details
Published in:能源化学：英文版 2013, Vol.22 (2), p.329-335
Main Author: Fei Han Wen-Cui Li Duo Li An-Hui Lu
Format: Article
Language:English
Subjects:
FE203
封装
有序介孔
氨处理
碳纤维复合材料
稳定
纳米粒子
锂离子电池
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Summary:To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe203 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area （〉1700 m2.g-1） and large pore volume （〉1.8 cm3-g-1）. Fine Fe203 nanoparticles with sizes in the range of 5-7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe203 loading was carefully tailored and designed to warrant a high Fe203 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe203 and mesoporous carbon composite with 47 wt% loading exhibits a considerably stable cycle performance （683 mAh.g-1 after 100 cycles, 99% capacity retention against that of the second cycle） as well as good rate capability. The fabrication strategy can effectively solve the drawback of single material, and achieve a high-performance lithium electrode material.
ISSN:2095-4956