Hydrothermal synthesis of Co3O4 with different morphologies and the improvement of lithium storage properties
Hydrothermal synthesis of Co3O4 with different morphologies and the improvement of lithium storage properties
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不同形貌Co3O4的水热合成及储锂性能的改善
DOI：
10.1016/j.matchemphys.2011.03.034
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发表时间：
2011-08
影响因子：
4.6
通讯作者：
Wu, Ying
中科院分区：
文献类型：
--
作者：
Liu, Yan;Zhang, Xiaogang;Wu, Ying
以六亚甲基四胺(HMT，C6H12N4)为沉淀剂，采用简单的水热法制备了不同形貌的Co3O4粉末。通过改变HMT的初始浓度，制备的Co3O4粉末的形貌很容易被调节，从微球到海胆状的中空微球，最后到塌陷的多孔结构。此外，还将四种不同HMT浓度的Co3O4粉末应用于锂离子电池负极材料中，表现出不同的电化学性能。目前的研究表明，形貌是影响电极电化学性能的关键因素之一。原始Co(NO3)2：HMT摩尔比为1：1的样品在40和60 mA/−1的电流密度下，5次循环后的容量保持率几乎都在94%以上，具有较高的比表面积(97.1m2g/−1)和均匀的海胆状中空结构，表现出较好的长寿命稳定性和良好的电化学性能。
A simple hydrothermal treatment was developed to synthesize Co3O4powders with different morphologies in mass production by using hexamethylenetetramine (HMT, C6H12N4) as a precipitator. By changing the initial HMT concentrations, the prepared Co3O4powders were readily regulated in its morphologies, which varied from microsphere to urchin-like hollow microsphere, and finally to collapsed porous structure. Moreover, the four Co3O4powders with different HMT concentrations had been applied in the negative electrode materials for lithium ion batteries, which exhibited different electrochemical properties. The present research demonstrated that morphology was one of the crucial factors that affected the electrochemical properties of electrodes. The capacity retention of sample with an original Co(NO3)2:HMT mole ratio of 1:1 is almost above 94% from the 5th cycle at different current densities of 40 and 60 mA g−1, exhibiting the better long-life stability and favorable electrochemical behaviors due to its higher specific surface area (97.1 m2g−1) and the uniform urchin-like hollow structure.
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影响因子：
29.4
作者：
Ting Yu;Yanwu Zhu;X. J. Xu;Zexiang Shen;Ping-Ou Chen;Chwee Teck Lim;J. Thong;C. Sow
通讯作者：
Ting Yu;Yanwu Zhu;X. J. Xu;Zexiang Shen;Ping-Ou Chen;Chwee Teck Lim;J. Thong;C. Sow
影响因子：
--
作者：
A. Gulino;G. Fiorito;I. Fragalà
通讯作者：
A. Gulino;G. Fiorito;I. Fragalà
用于电化学能量转换和存储装置的纳米结构材料
影响因子：
29.4
作者：
Guo, Yu-Guo;Hu, Jin-Song;Wan, Li-Jun
通讯作者：
Wan, Li-Jun
影响因子：
9.2
作者：
S. Oh;H. Bang;Y. Bae;Yangfang Sun
通讯作者：
S. Oh;H. Bang;Y. Bae;Yangfang Sun
影响因子：
15
作者：
Liu, ZP;Ma, RZ;Sasaki, T
通讯作者：
Sasaki, T