【摘要】 采用阳极氧化法及后续高温煅烧制备了三维微纳玉米叶状Cu₂O/Cu锂离子电池负极材料。利用X射线衍射、扫描电子显微镜对产物的物相组分、晶体结构和形貌进行了系统表征;利用电化学工作站、电池性能测试系统对制备的电极材料进行电化学性能的分析和计算。结果表明,铜箔表面被均匀刻蚀了一层玉米叶状Cu₂O,长度约为100～200 nm,宽度约为30 nm;玉米叶状Cu₂O/Cu作为锂离子电池负极材料,在电流密度为100 mAhg-1经过200次充/放电循环后,该负极材料的可逆放电比容量仍高达848.6 mAhg-1:电化学交流阻抗谱图拟合和计算的结果表明三维微纳玉米叶状Cu₂O/Cu电极材料具有更低的电荷传质电阻和更好的锂离子固相扩散能力。更多还原

【Abstract】 The anode material of three-dimensional micro-nano corn-leaf-shaped Cu₂O/Cu lithium ion battery was prepared by anodizing method and subsequent high-temperature calcination. The structure and morphology of the product were characterized by X-ray diffraction and scanning electron microscope. The product electrochemical performance was characterized by constant current charge and discharge and EIS test,analysis and calculation. The results showed that the surface of the copper foil was uniformly etched with a layer of corn-leaf-shaped Cu₂O;with a length of about 100 ～ 200 nm and a width of about 30 nm. Corn-leaf-shaped Cu₂O/Cu was used as a lithium ion battery anode material. After 200 charge/discharge cycles under the current density 100 mAhg-1,the reversible discharge specific capacity of the anode material was still as high as 848.6 mAhg-1. The EIS fitting and calculation results showed that the three-dimensional micro-nano corn-leaf-shaped Cu₂O/Cu electrode material had lower charge transfer resistance and better lithium ion solid phase diffusion ability.更多还原