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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A beta-FeOOH/MXene sandwich for high-performance anodes in lithium-ion batteries
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A beta-FeOOH/MXene sandwich for high-performance anodes in lithium-ion batteries

机译:锂离子电池中高性能阳极的Beta-FeOh / mxene三明治

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FeOOH is one of the earth abundant and high-capacity anode materials for lithium-ion batteries (LIBs), but faces problems of inevitable structure collapse and thus poor capacity retention. Herein, we report a composite of beta-FeOOH/Ti(3)C(2)T(x)MXene sandwich by an intercalation of beta-FeOOH nanorods within single-layer Ti(3)C(2)T(x)MXene flakes. After 100 cycles, the beta-FeOOH/Ti(3)C(2)T(x)composite retains a capacity of 937.5 mA h g(-1)at 200 mA g(-1), and 671.4 mA h g(-1)at 1 A g(-1). The composite as an anode in LIB delivers improved cyclability and better high-rate performance compared to pristine beta-FeOOH, which result from the excellent conductivity of single-layer MXene, facilitating mass transport by the sandwich structure. This work provides a strategy for the design of electrodes, particularly in Na-ion and K-ion batteries, which involve active materials that experience volume change and structural damage during cycling.
机译:FeOOH是用于锂离子电池(LIBS)的地球丰富和高容量的阳极材料之一,但面临不可避免的结构崩溃的问题,从而衡量容量滞留。 在此,我们通过在单层Ti(3)C(2)T(x)mxene内的β-FeOOH纳米棒的插层嵌入β-FeOOH / Ti(3)C(2)T(x)mxene夹层的复合物。 薄片。 100次循环后,β-FeOH / Ti(3)C(2)T(X)复合材料在200mAg(-1)和671.4 mA Hg(-1)中保留937.5 mA Hg(-1)的容量。 在1克(-1)。 与原始Beta-FeOOH相比,Lib中的阳极作为阳极的复合材料可提供改进的可循环性和更好的高速率性能,这是由单层MXENE的优异导电性导致的,促进夹层结构的质量传输。 这项工作为电极设计提供了一种策略,特别是在Na离子和K离子电池中,这涉及在循环过程中经历体积变化和结构损坏的活性材料。

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