ZnO超细纳米线阵列的制备及其电化学性能

摘要/Abstract

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。

关键词: 锂离子电池, 负极材料, 电化学性能, 氧化锌, 水热法

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.

Key words: lithium-ion battery, anode material, electrochemical property, ZnO, hydrothermal method

中图分类号:

TM912
TB332

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.

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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