Abstract
Amorphous and crystalline hybrid structure Co2SnO4/C composites have been prepared by a facile way using coprecipitation process and high-energy ball milling technology. Electrochemical performance tests show that the composite anodes could maintain reversible capacity of higher than 550 mAh g−1 up to 100 cycles, much better than that of pure Co2SnO4 (194.1 mAh g−1). These materials also present better rate performance with fairly stable capacity retention when the current ranges from 100 to 500 mA g−1. Impedance measurements confirm that these composites are more beneficial for lithium diffusion compared to pure Co2SnO4. The graphite carbon not only buffers the volume expansion-related cracking but also provides excellent conductivity for this material.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51101062 and 51171065); Science and Technology Project of Guangzhou City, China (Grant No. 2011 J4100075); Foundation for Distinguished Young Talents in Higher Education of Guangdong, China (Grant No. LYM09052); China Scholarship Council (No. 201308440314); Extracurricular Science Foundation for Students in South China Normal University of Guangdong, China (Grant No. 13WDGB03); The Scientific Research Foundation of Graduate School of South China Normal University (Grant No. 2013KYJJ039); Guangdong Natural Science Foundation (Grant Nos. S2012020010937, 10351063101000001, and 2014A030313436); Guangdong Engineering Technology Research Center of Low Carbon and Advanced Energy Materials, Guangzhou 510631, China; and University-Industry Cooperation Projects of Guangdong Province, Ministry of Education and Science & Technology (Grant No. 2011A091000014).
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An, B., Ru, Q., Hu, S. et al. Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries. Ionics 21, 2485–2493 (2015). https://doi.org/10.1007/s11581-015-1437-8
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DOI: https://doi.org/10.1007/s11581-015-1437-8