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论文类型：期刊论文

发表时间：2013-03-01

发表刊物：JOURNAL OF ENERGY CHEMISTRY

收录刊物：SCIE、EI

卷号：22

期号：2

页面范围：329-335

ISSN号：2095-4956

关键字：ordered mesoporous carbon; Fe2O3 nanoparticle; cycle stability; lithium-ion anode

摘要：To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (>1700 m(2).g(-1)) and large pore volume (>1.8 cm(3).g(-1)). Fine Fe2O3 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 Fe2O3 loading was carefully tailored and designed to warrant a high Fe2O3 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe2O3 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.