CuO/C复合薄膜的制备及其作为钠离子电池负极的电化学性能  

Preparation of CuO/C Composite Films and Their Electrochemical Properties Used as Anodes for Sodium Ion Batteries

作　　者：赵卓凡 闫共芹[1] 蓝春波 王晨 戚艳超 付向辉 Zhao Zhuofan;Yan Gongqin;Lan Chunbo;Wang Chen;Qi Yanchao;Fu Xianghui(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545616,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545616

出　　处：《微纳电子技术》2025年第4期125-132,共8页Micronanoelectronic Technology

基　　金：广西自然科学基金(2020GXNSFAA159024);广西高校中青年教师科研基础能力提升项目(2022KY0350);广西汽车零部件与整车技术重点实验室自主课题(2023GKLACVTKF03)。

摘　　要：通过湿化学法和磁控溅射法制备了CuO/C薄膜材料,并将其作为钠离子电池负极。研究了碳复合对CuO薄膜电化学性能的影响,并通过第一性原理计算了钠离子吸附能。研究结果表明,与CuO薄膜相比,通过磁控溅射进行碳复合后形成的CuO/C复合材料具有更优异的电化学性能,复合前、后的薄膜材料在0.01~3 V的电压范围和100 mA/g的电流密度下,经过100圈充放电循环后的容量保持率分别为57.6%和67.6%,在2000 mA/g的电流密度下首圈放电比容量分别为227.9和270.7 mA·h/g。复合薄膜电化学性能的增强可归因于薄膜中的碳具有一定的柔韧性和较好的导电性,复合后能够有效缓解CuO体积膨胀和弱导电性问题。计算结果表明,CuO和CuO/C对单个钠离子的吸附能分别为-2.48606和-3.93544 eV,在CuO和C的协同作用下,CuO/C复合材料表现出更加优异的亲钠性。CuO/C film materials were prepared through wet chemical method and magnetron sputtering method and used as anodes for sodium ion batteries.The influences of carbon compositing on the electrochemical properties of CuO films were investigated,and the sodium ion adsorption energy was calculated using first principles.The study results indicate that,compared to CuO films,the CuO/C composite materials formed through magnetron sputtering and carbon compositing have better electrochemical properties.Under the voltage range of 0.01-3 V and the current density of 100 mA/g,the capacity retention rates of the film materials with and without compositing after 100 charge-discharge cycles are 57.6%and 67.6%,respectively.At the current density of 2000 mA/g,the first-cycle discharge specific capacities of the film materials with and without compositing are 227.9 and 270.7 mA·h/g,respectively.The enhancement of electrochemical properties of the composite films can be attributed to the flexibility and good electrical conductivity of the carbon in the films,and the problems of CuO volume expansion and weak electrical conductivity can be effectively alleviated after compositing.The calculation results show that the adsorption energies of CuO and CuO/C for a single sodium ion are-2.48606 and-3.93544 eV,respectively.Due to the synergistic effect of CuO and C,the CuO/C composite materials demonstrate superior sodium affinity.

关 键 词：钠离子电池负极 CuO/C复合薄膜 磁控溅射 电化学性能 吸附能 

分 类 号：TB34[一般工业技术—材料科学与工程]