Synthesis and electrochemical performance of Li₂FeSiO₄/carbon/carbon nano-tubes for lithium ion battery

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• 作者：Xiaobing Huang ; Xing Li ; Haiyan Wang ; Zhonglai Pan ; Meizhen Qu ; Zuolong Yu
• 关键词：Lithium ion battery ; Solid-state reaction ; Li₂FeSiO₄/C/CNT composite ; Li₂FeSiO₄/C composite ; Conductive network
• 刊名：Electrochimica Acta
• 出版年：2010
• 出版时间：1 October 2010
• 年：2010
• 卷：55
• 期：24
• 页码：7362-7366
• 全文大小：289 K

文摘

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.