首页> 外文期刊>RSC Advances >High-rate electrode material 2LiFePO(4)center dot Li3V2(PO4)(3)@carbon/graphene using the in situ grown Fe-4(VO4)(4)center dot 15H(2)O precursor on the surface of graphite oxide
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High-rate electrode material 2LiFePO(4)center dot Li3V2(PO4)(3)@carbon/graphene using the in situ grown Fe-4(VO4)(4)center dot 15H(2)O precursor on the surface of graphite oxide

机译:高速电极材料2Lifepo(4)中央点Li3v2(PO4)(3)@碳/石墨烯使用原位生长的Fe-4(VO4)(4)中心点15h(2)O前体在石墨氧化物表面上

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摘要

2LiFePO(4)center dot Li3V2(PO4)(3)@carbon/graphene (2LFP center dot LVP@C/G) as a cathode material, based on an in situ grown Fe-4(VO4)(4)center dot 15H(2)O precursor on the surface of graphene oxide, was synthesized by a solid-state process. The X-ray diffraction Rietveld refinement and Raman spectroscopy results indicated that multi-phase structural 2LiFePO(4)center dot Li3V2(PO4)(3) with a carbon/graphene coating was obtained. The morphology is characterized by HRTEM tests, which reveal well crystallized 2LFP center dot LVP@C/G with bridging graphene nanosheets, forming an effective three-dimensional conducting network. Compared with 2LiFePO(4)center dot Li3V2(PO4)(3)@carbon (2LFP center dot LVP@C), the electrochemical results demonstrate that the 2LFP center dot LVP@C/G electrode measured at 0.1 C and 10 C can deliver a high specific discharge capacity of 151.2 mA h g(-1) and 125.4 mA h g(-1), respectively, and has a discharge capacity of 100.2 mA h g(-1) at -30 degrees C at 0.1 C, indicating better rate capability and thermal properties.
机译:2LifePo(4)中心点Li3v2(PO4)(3)/ /石墨烯(2LFP中心点LVP @ C / G)作为阴极材料,基于原位生长Fe-4(VO4)(4)中心点15H (2)通过固态工艺合成石墨烯表面上的o前体。 X射线衍射RIETVELD细化和拉曼光谱结果表明,获得具有碳/石墨烯涂层的多相结构2LifePO(4)中心点Li3V2(PO4)(3)。形态的特征在于HRTEM测试,其揭示了具有桥接石墨烯纳米片的良好结晶的2LFP中心点LVP @ C / G,形成了有效的三维导电网络。与2Lifepo(4)中心点Li3v2(PO4)(3)@Carbon(2LFP中心点LVP @ C)相比,电化学结果表明,在0.1c和10c下测量的2LFP中心点LVP @ C / G电极可以提供分别为151.2 mA Hg(-1)和125.4 mA Hg(-1)的高特异性放电容量,并在0.1℃下在-30℃下放电容量为100.2 mA hg(-1),表明更好的速率能力和热性质。

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  • 来源
    《RSC Advances》 |2015年第41期|共7页
  • 作者单位

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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