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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Self-assembled FeF3 nanocrystals clusters confined in carbon nanocages for high-performance Li-ion battery cathode
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Self-assembled FeF3 nanocrystals clusters confined in carbon nanocages for high-performance Li-ion battery cathode

机译：自组装的FEF3纳米晶体簇局限于高性能锂离子电池阴极的碳纳米载体

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摘要

With the revival of lithium metal anodes, there is an urgent need for matching cathodes to form the next generation batteries with high-capacity and low-cost. A porous hierarchical structure containing FeF3 nanocrystals (3 & ndash;9 nm) capsulated in conductive carbon nanocages (40 & ndash;110 nm) was fabricated. The morphology and size of the FeF3 nanocrystals were influenced by the existence of carbon nanocage. During the preparation process, the carbon nanocage inhibited the growth of FeF3 crystals. During the dis/charge process, the carbon nanocages not only restricted the complex conversion reaction (Fe3+ reversible arrow Fe2+ reversible arrow Fe) within the confined space, but also functioned as a bridge for the transmission of electrons, thus enhancing the electrochemical performance of the electrode. As a result, the FeF3/C electrode delivered an excellent reversible capacity of 410 mA h g & minus;1 over 120 cycles at 100 mA g & minus;1.
机译：随着锂金属阳极的复兴，迫切需要匹配的阴极来形成高容量、低成本的下一代电池。制备了一种含有FeF3纳米晶体（3&ndash；9nm）的多孔分层结构，其封装在导电碳纳米笼（40&ndash；110nm）中。碳纳米笼的存在影响了FeF3纳米晶体的形态和尺寸。在制备过程中，碳纳米笼抑制了FeF3晶体的生长。在放电/充电过程中，碳纳米笼不仅限制了受限空间内的复杂转化反应（Fe3+可逆arrow Fe2+可逆arrow Fe），还充当了电子传输的桥梁，从而提高了电极的电化学性能。因此，FeF3/C电极的可逆容量为410 mA h g&负；1在100 mA g和负值下进行120次循环；1.

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