期刊
CRYSTENGCOMM
卷 15, 期 8, 页码 1578-1585出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce26632f
关键词
-
资金
- Scientific Research Funds of Xiangtan University [2011XZX04, 2011XZX05]
- Hunan Provincial Education Department [11C1198]
- Hunan Provincial Science and Technology Department [2012RS4005]
- China Postdoctoral Science Foundation [2011M501279, 2012T50698]
- National Natural Science Foundation of China [11202177, 51202207]
- Deakin Alfred Postdoctoral Fellowship, Deakin University, Australia
In this work, we report a mild and cost-effective solution method to directly grow Ni-substituted Co3O4 (ternary NiCo2O4) nanorod arrays on Cu substrates. Electrochemical impedance spectroscopy (EIS) measurements show that the values of the electrolyte resistance Re and charge-transfer resistance R-ct of NiCo2O4 are 6.8 and 63.5 Omega, respectively, which are significantly lower than those of binary Co3O4 (10.4 and 122.4 Omega). This EIS characterization strongly confirms that the ternary NiCo2O4 anode has much higher electrical conductivity than that of the binary Co3O4 electrode materials, which should greatly enhance the lithium storage performances. Due to the well-aligned 1D nanorod microstructure and a higher electrical conductivity, these ternary NiCo2O4 nanorod arrays manifest high specific capacity, excellent cycling stability (a high reversible capacity of about 830 mA h g(-1) was achieved after 30 cycles at 0.5 C) and high rate capability (787, 695, 512, 254, 127 mA h g(-1) at 1 C, 2 C, 6 C 50 C and 110 C, respectively).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据