| ZnO超细纳米线阵列的制备及其电化学性能 |
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| 引用本文： | 周阳阳,张子英,翁滢.ZnO超细纳米线阵列的制备及其电化学性能[J].人工晶体学报,2021,50(3):536-541. |
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| 作者姓名： | 周阳阳 张子英 翁滢 |
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| 作者单位： | 上海工程技术大学材料工程学院,上海 201620 |
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| 基金项目： | 上海市自然科学基金(14ZR1418300) |
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| 摘 要： | 以Zn(NO3)2· 6H2O和C6H12N4为原材料,采用二步水热法在碳纤维布上合成了形貌尺寸均匀的ZnO超细纳米线阵列。用 X 射线衍射(XRD)和扫描电镜(SEM)对其晶体结构和形貌进行了表征,利用恒流充放电测试等手段对其进行电化学性能测试。测试结果表明,材料表现出优异的电化学性能。在200 mA/g的电流密度下循环150次后,ZnO超细纳米线阵列仍然约有730 mAh/g的充放电比容量,库伦效率保持在95%以上。在1 200 mA/g的大倍率条件下,材料的充放电比容量依旧可达481 mAh/g左右,表现出十分良好的循环稳定性和可逆性能,是一种较为理想的锂离子电池负极复合材料。
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| 关 键 词： | 锂离子电池 负极材料 电化学性能 氧化锌 水热法 |
| 收稿时间： | 2021-01-04 |
Synthesis of Ultrafine ZnO Nanowire Arrays and Its Electrochemical Performance |
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| ZHOU Yangyang,ZHANG Ziying,WENG Ying.Synthesis of Ultrafine ZnO Nanowire Arrays and Its Electrochemical Performance[J].Journal of Synthetic Crystals,2021,50(3):536-541. |
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| Authors: | ZHOU Yangyang ZHANG Ziying WENG Ying |
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| Affiliation: | School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China |
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| Abstract: | Using Zn(NO3)2·6H2O and C6H12N4 as raw materials, ZnO nanowire arrays with uniform morphology and size were synthesized by conventional two-step hydrothermal method on carbon fiber cloth. Their crystal structure and morphologies were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and their electrochemical performance was tested by constant current charge-discharge test. The results show that these materials have excellent electrochemical performance. After 150 cycles at the current density of 200 mA/g, the specific capacity of ZnO nanowire arrays is still about 730 mAh/g, and the Coulomb efficiency remains above 95%. At a high rate of 1 200 mA/g, the charge-discharge capacity of the products is still about 481 mAh/g, showing good cycle stability and reversibility. The ultrafine ZnO nanowire arrays are a promising anode material for lithium-ion batteries. |
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| Keywords: | lithium-ion battery anode material electrochemical property ZnO hydrothermal method |
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