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Highly pseudocapacitive metal–organic framework derived carbon skeleton supported Fe–Ti–O nanotablets as an anode material for efficient lithium storage
Nanoscale ( IF 6.7 ) Pub Date : 2020/03/30 , DOI: 10.1039/c9nr10536k
Yumeng Guo 1, 2, 3, 4, 5 , Lijuan Zhang 1, 2, 3, 4, 5
Affiliation  

A facile and effective method to fabricate highly pseudocapacitive electrodes of Fe–Ti–O@C has been proposed here. In this strategy, FeOOH crystals were firstly grown uniformly on the surface of Ti-based MOF (MIL-125) tablet substrates through a solution immersion method, and then converted to uniform carbon supported Fe–Ti–O composites by calcination under argon. The obtained Fe–Ti–O@C composites were first utilized as an efficient anode for lithium ion batteries with a high reversible capacity of 988 mA h g−1 after 160 cycles at 200 mA g−1. Such a superior lithium storage performance may be due to the synergistic effect of the Fe3O4 nanoparticles with a high capacity, FeTiO3 nanocomposites with a nearly stable structure during the Li+ insertion/removal process, and the conductive carbon skeleton with a large surface area and porous structure. This work represents an important step forward in the fabrication of MOF-derived hybrids and enables transition metal oxides (TMOs) to have potential applications in energy storage systems.

中文翻译:

高度拟电容金属-有机骨架衍生的碳骨架支撑的Fe-Ti-O纳米片作为有效锂存储的阳极材料

在此提出了一种简便有效的方法来制造高假电容性的Fe–Ti–O @ C电极。在此策略中,首先通过溶液浸没法在Ti基MOF(MIL-125)片剂基板表面上均匀生长FeOOH晶体,然后通过在氩气下煅烧将其转变为均匀的碳负载Fe-Ti-O复合材料。将得到的铁钛-O @ C复合材料首先用作一种有效的阳极的锂离子电池用988毫安Hg的高可逆容量-1以200mA克160次循环后-1。如此出色的锂存储性能可能是由于具有高容量的Fe 3 O 4纳米颗粒FeTiO 3的协同作用纳米复合材料在Li +插入/去除过程中具有几乎稳定的结构,而导电碳骨架具有较大的表面积和多孔结构。这项工作代表了制造MOF的混合动力汽车迈出的重要一步,并使过渡金属氧化物(TMO)在储能系统中具有潜在的应用。
更新日期:2020-04-09
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