Journal
JOURNAL OF POWER SOURCES
Volume 258, Issue -, Pages 305-313Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.02.055
Keywords
Zinc ferrite; Mesoporous; Carbon network; Citric acid
Funding
- Scientific Research and Cultivating Fund of Young Teachers in South China Normal University
- National Science Foundation of China (NSFC) [51201066, 51171065]
- Natural Science Foundation of Guangdong Province [S2012020010937, 10351063101000001]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong [2012LYM_0048]
- Scientific Research Foundation of Graduate School of South China Normal University
- ARC future fellowship
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The commercialized LIBs employing graphite as anodes currently suffer a series of problems from the safety, theoretical capacity (372 mAh g(-1)) and rate capability. Herein, self-assembly mesoporous Zn ferrite (ZnFe2O4) microsphere embedded into carbon network has been synthesized by a facile method in the presence of citric acid. The Zn ferrites as an anode material with novel structure demonstrate superior electrochemical performance, with enhanced specific reversible capacity (similar to 1100 mAh g(-1) at the specific current of 0.05 A g(-1) after 100 cycles), excellent rate capability (more than 500 mAh g(-1) even at the specific current of 1.1 A g(-1)) and good cycleability with little fading (similar to 97.6% after 100 cycles). The excellent cycling performance is associated with the loose Zn ferrite microsphere with numerous mesopores embedded into the carbon network, which can accommodate the severe mechanism strains and provides good electrical contact and conductivity. The superior electrochemical performance may facilitate ZnFe2O4 to be a promising alternative anode in lithium ion battery. (C) 2014 Elsevier B.V. All rights reserved.
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