Facile synthesis of metal-organic framework-derived Co3O4 with different morphologies coated graphene foam as integrated anodes for lithium-ion batteries
Facile synthesis of metal-organic framework-derived Co3O4 with different morphologies coated graphene foam as integrated anodes for lithium-ion batteries
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轻松合成金属有机骨架衍生的具有不同形貌的涂层石墨烯泡沫Co3O4作为锂离子电池集成阳极
DOI：
10.1016/j.jallcom.2018.07.290
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发表时间：
2018-11
影响因子：
6.2
通讯作者：
Aihua Yuan
中科院分区：
文献类型：
--
作者：
Jinxiao Shao;Hu Zhou;Meizhou Zhu;Jianhui Feng;Aihua Yuan
提出了一种制备不同形貌的金属有机骨架（MOF）衍生的Co 3 O 4和石墨烯泡沫（GF）复合材料的简单方法。所得Co 3 O 4/GF材料可直接用作锂离子电池的一体化负极，其电化学性能在比容量、长循环稳定性和倍率性能等方面均明显上级纯Co 3 O 4。这些增强的性能源自GF和MOF衍生的金属氧化物之间的协同相互作用，其中GF提供高导电性、大比表面积和优异的机械性能，而金属氧化物有助于高的电化学活性。讨论了复合材料中Co 3 O 4形貌对电化学性能的影响。得益于独特的结构特征，叶状Co 3 O 4/GF集成电极在100 mA g−1的电流密度下经过250次循环后提供了986 mA h g − 1的高容量，这优于块状和棒状Co 3 O 4/GF样品中观察到的容量。即使在2 A g−1下测量，Co 3 O 4/GF电极仍然显示出约340 mA h g−1的容量。复合材料中Co 3 O 4独特的叶状结构使其具有较高的电化学性能。
A facile strategy to fabricate the composites including metal-organic framework (MOF)-derived Co3O4with different morphologies and graphene foam (GF) is proposed in this work. The resulting Co3O4/GF materials can be directly employed as integrated anodes of lithium-ion batteries, and their electrochemical performances are significantly superior to pure Co3O4in specific capacities, long-cycle stabilities and rate performances. The enhanced properties originate from the synergistic interaction between GF and MOF-derived metal oxides, where GF provides high conductivity, large specific surface area and excellent mechanical property, whereas metal oxides contribute to high electrochemical activities. The effect of Co3O4morphologies in the composites on the electrochemical properties is also discussed. Benefitting from the unique structure feature, the leaf-Co3O4/GF integrated electrode delivers a high capacity of 986 mA h g−1after 250 cycles at a current density of 100 mA g−1, which is better than those observed in the block- and rod-Co3O4/GF samples. Even measured at 2 A g−1, the leaf-Co3O4/GF electrode still shows a capacity of around 340 mA h g−1. The relatively high electrochemical behaviors are attributed to the unique leaf-like structure of Co3O4in the composite.
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影响因子：
17.1
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影响因子：
10.8
作者：
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通讯作者：
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