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Facile preparation of hierarchical micro-nano FeF(3)0.33H(2)O by a one-pot method with dual surfactants

机译:用双表面活性剂的单罐方法容易制备分层微纳米Fef(3)0.33h(2)o

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摘要

To prepare a hierarchical micro-nano structure FeF(3)0.33H(2)O simply and economically, a one-pot method with dual surfactants was used. Scanning electron microscopy and a Fourier transformation infrared spectrometer revealed that polyvinyl pyrrolidone (PVP) regulates the morphology of the material, while cetyltrimethylammonium bromide (CTAB) can reshape FF@PVP, it can not only remove PVP at room temperature, but also obtain a hierarchical micro-nano structure. The electrochemical results show that the hierarchical micro-nano structure FF(1.5CTAB 0.5PVP) has the best electrochemical performance. It maintained a high specific capacity of 109.4 mAh g(-1) after 100 cycles at 1 C. In particular, under the ultra-high rate discharge of 20 C, the ultra-high specific discharge capacity of 66.4 mAh g(-1) was reached. The FF(1.5CTAB 0.5PVP)'s excellent electrochemical performance is mainly due to a large contact area between the electrolyte and active materials.
机译:为了简单、经济地制备具有层次结构的FeF(3)0.33H(2)O微纳米结构,采用了双表面活性剂一锅法。扫描电子显微镜和傅里叶变换红外光谱仪显示,聚乙烯吡咯烷酮(PVP)调节材料的形态,而十六烷基三甲基溴化铵(CTAB)可以重塑材料的形态FF@PVP它不仅可以在室温下去除PVP,而且可以获得分级的微纳结构。电化学结果表明,分级微纳结构FF(1.5CTAB 0.5PVP)的电化学性能最好。在1 C下进行100次循环后,它保持了109.4 mAh g(-1)的高比容量。特别是在20 C的超高倍率放电下,达到了66.4 mAh g(-1)的超高比容量。FF(1.5CTAB 0.5Pp)优异的电化学性能主要归功于电解液和活性材料之间的大接触面积。

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