Ferrocene as precursor for carbon-coated α-Fe2O3 nano-particles for rechargeable lithium batteries
Ferrocene as precursor for carbon-coated α-Fe2O3 nano-particles for rechargeable lithium batteries
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DOI：
10.1016/j.jpowsour.2012.11.125
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发表时间：
2013-05
影响因子：
9.2
通讯作者：
A. Brandt;A. Balducci
中科院分区：
文献类型：
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作者：
A. Brandt;A. Balducci
二茂铁可以作为碳包覆α-Fe 2 O3纳米粒子的前驱体。二茂铁的热解导致形成一种化合物，该化合物可以通过在空气中的简单氧化完全转化为碳包覆的α-Fe 2 O3纳米颗粒。这种简单、快速和廉价的合成路线使得能够实现粒径在50- 150 nm范围内的碳包覆纳米颗粒。此外，改变氧化温度，可以精确地控制纳米颗粒上存在的碳涂层。所得碳包覆α-Fe 2 O3纳米粒子可在水中容易地加工成具有适合于实际应用的组成的复合电极。当与常规电解质组合使用时，此类电极显示出高比容量（在0.13Ag−1下超过800 mAhg − 1）、优异的循环保持率（在50次循环后高于99%）和显著的倍率性能（在5Ag−1下超过400 mAhg − 1）。
Ferrocene can be used as a precursor for the synthesis of carbon-coated α-Fe2O3nano-particles. The pyrolysis of ferrocene leads to the formation of a compound that can be fully converted into carbon-coated α-Fe2O3nano-particles via a simple oxidation in air. This simple, fast and cheap synthetic route enables the realization of carbon-coated nano-particles with particle size in the range of 50–150nm. Moreover, varying the oxidation temperature, it is possible to control precisely the carbon coating present on the nano-particles. The so obtained carbon-coated α-Fe2O3nano-particles can be easily processed in water to realize composite electrodes with a composition suitable for practical application. When used in combination with conventional electrolytes such electrodes display high specific capacity (over 800mAhg−1at 0.13Ag−1), excellent cycling retention (higher than 99% after 50 cycles), and remarkable rate performance (over 400mAhg−1at 5Ag−1).