Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 24, Pages 7362-7366Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.07.036
Keywords
Lithium ion battery; Solid-state reaction; Li2FeSiO4/C/CNT composite; Li2FeSiO4/C composite; Conductive network
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Li2FeSiO4/carbon/carbon nano-tubes (Li2FeSiO4/C/CNTs) and Li2FeSiO4/carbon (Li2FeSiO4/C) composites were synthesized by a traditional solid-state reaction method and characterized comparatively by X-ray diffraction, scanning electron microscopy. BET surface area measurement, galvanostatic charge-discharge and AC impedance spectroscopy. respectively. The results revealed that the Li2FeSiO4/C/CNT composite exhibited much better rate performance in comparison with the Li2FeSiO4/C composite. At 0 2 C, 5 C and 10 C, the former composite electrode delivered a discharge capacity of 142 mAh g(-1), 95 mAh g(-1), 80 mAh g(-1), respectively, and after 100 cycles at 1 C, the discharge capacity remained 95.1% of its initial value (C) 2010 Elsevier Ltd. All rights reserved.
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