General synthesis of MFe2O4/carbon (M = Zn, Mn, Co, Ni) spindles from mixed metal organic frameworks as high performance anodes for lithium ion batteries
General synthesis of MFe2O4/carbon (M = Zn, Mn, Co, Ni) spindles from mixed metal organic frameworks as high performance anodes for lithium ion batteries
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混合金属有机骨架材料一般合成 MFe2O4/碳（M = Zn、Mn、Co、Ni）纺锤体作为锂离子电池的高性能阳极
DOI：
10.1039/c7ta07097g
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发表时间：
2017
影响因子：
11.9
通讯作者：
Jianlin Huang
中科院分区：
文献类型：
--
作者：
Zhong-Jie Jiang;Si Cheng;Haibo Rong;Zhongqing Jiang;Jianlin Huang
提出了一种合成纺锤形MFe2O4/C(M=锌、钴、镍、锰)的通用方法。合成过程包括混合金属有机骨架(即Fe2M-MOF)的制备和随后的焙烧。所得到的MFe2O4/C纺锤显示了一种有趣的结构，它由碳包覆的二次MFe2O4纳米粒子组成，并具有相互连接的碳网络。这使得它们成为性能增强的各种应用的活性材料，具有很高的前景。例如，当用作锂离子电池的负极时，与以前报道的MFe2O4材料相比，MFe2O4/C主轴具有更高的可逆容量和更高的循环稳定性。最有趣的是，这些MFe2O4/C纺锤在循环过程中表现出良好的形态保持性。这表明，MFe2O4在锂化时的体积膨胀导致了一些活性物质沿渗流通道浸出到MFe2O4/C主轴的表面。这减轻了体积膨胀能，防止了MFe2O4/C主轴的结构破坏。浸出的活性物质在整个循环过程中不脱离MFe2O4/C主轴，参与锂离子/脱硫化反应，使MFe2O4/C主轴具有较高的比容量和良好的耐久性。该方法具有很强的通用性，可用于合成各种用途的MFe2O4/C主轴。
A general method has been developed for the synthesis of the spindle-like MFe2O4/C (M = Zn, Co, Ni, Mn). The synthetic procedure involves the preparation of mixed metal organic frameworks (i.e. Fe2M-MOFs) and their subsequent calcination. The obtained MFe2O4/C spindles show an intriguing structure, which consists of carbon coated secondary MFe2O4 nanoparticles with an interconnected carbon network. This makes them highly promising as the active materials for various applications with enhanced performance. For example, when used as the anode for lithium ion batteries (LIBs), the MFe2O4/C spindles exhibit higher reversible capacities and higher cycling stability in comparison to the MFe2O4 materials reported previously. Most interestingly, these MFe2O4/C spindles exhibit good morphology preservation during cycling. This shows that the volumetric expansion of MFe2O4 upon lithiation leads to the leaching of some active materials to the surface of the MFe2O4/C spindles along the percolation channels. This alleviates the volumetric expansion energy and prevents the structural destruction of MFe2O4/C spindles. The leached active materials do not detach from the MFe2O4/C spindles and participate in the lithiation/delithiation reactions throughout the whole cycling process, giving the MFe2O4/C spindles with high specific capacity and good durability. The approach reported here is highly versatile and might be applicable to the synthesis of other MFe2O4/C spindles for various applications.