Co3O4 nanostructures with a high rate performance as anode materials for lithium-ion batteries, prepared via book-like cobalt–organic frameworks
Co3O4 nanostructures with a high rate performance as anode materials for lithium-ion batteries, prepared via book-like cobalt–organic frameworks
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DOI：
10.1039/c4ce01277a
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发表时间：
2014-10
期刊：
影响因子：
3.1
通讯作者：
B. Yan;Lin Chen;Yuanjun Liu;Guoxing Zhu;Chunguang Wang;Han Zhang;Gang Yang;H. Ye;Aihua Yuan-Aihua
中科院分区：
文献类型：
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作者：
B. Yan;Lin Chen;Yuanjun Liu;Guoxing Zhu;Chunguang Wang;Han Zhang;Gang Yang;H. Ye;Aihua Yuan-Aihua
用溶剂热法研究了钴配合物的二维自组装。Co-CPs的形貌由不同的溶剂热条件控制。Co-CPs热解后仍保留有Co 3 O 4纳米粒子团聚的二维纳米结构。采用循环伏安法（CV）、电化学阻抗谱（EIS）和恒流充放电测试对合成的Co 3 O 4负极材料进行了表征。Co 3 O 4的形貌对高性能锂离子电池负极材料起着至关重要的作用。具有开卷形态的Co 3 O 4纳米颗粒在800 mA g-1的电流速率下50次循环后提供597 mA h g-1的高容量。Co 3 O 4的开卷形态提供了有效的锂离子扩散通道，并增加了电解质/Co 3 O 4接触/界面面积。在一个相对较高的电流率为1200毫安g-1，Co 3 O 4与开卷形态提供了一个出色的率能力为574毫安h g-1。
The self-assembly of cobalt coordination frameworks (Co-CPs) with a two-dimensional morphology is demonstrated by a solvothermal method. The morphology of the Co-CPs has been controlled by various solvothermal conditions. The two-dimensional nanostructures agglomerated by Co3O4 nanoparticles remained after the pyrolysis of the Co-CPs. The as-synthesized Co3O4 anode material is characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge measurements. The morphology of Co3O4 plays a crucial role in the high performance anode materials for lithium batteries. The Co3O4 nanoparticles with opened-book morphology deliver a high capacity of 597 mA h g-1 after 50 cycles at a current rate of 800 mA g-1. The opened-book morphology of Co3O4 provides efficient lithium ion diffusion tunnels and increases the electrolyte/Co3O4 contact/interfacial area. At a relatively high current rate of 1200 mA g-1, Co3O4 with opened-book morphology delivers an excellent rate capability of 574 mA h g-1.