Mo2N薄膜电极的制备与电化学性能  

Preparation and electrochemical performance of Mo2N thin film electrodes

作　　者：王诗文 高红鸽 谢江伟 王利霞 WANG Shi-wen;GAO Hong-ge;XIE Jiang-wei;WANG Li-xia(School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou,Henan 450002,China)

机构地区：[1]郑州轻工业大学材料与化学工程学院,河南郑州450002

出　　处：《电池》2020年第5期450-453,共4页Battery Bimonthly

基　　金：国家自然科学基金(21503193);众创空间孵化项目(2019ZCKJ214);大学生创新创业训练计划项目(S202010462035)。

摘　　要：采用直流磁控溅射法在铜箔上制备具有面心立方晶型(fcc)的γ-氮化钼(γ-Mo2N)薄膜电极。通过XRD、SEM、透射电子显微镜及恒流充放电等测试,分析氩气(Ar)与氮气(N2)体积比对Mo2N薄膜电极形貌及电化学储锂性能的影响。当Ar∶N2的体积比为4∶1时,制备的Mo2N薄膜电极(记为Mo2N-4)具有最佳的电化学储锂性能,在1000μA/cm^2下仍有87μAh/cm^2的可逆容量密度。这归因于Mo2N-4薄膜电极的多孔的纳米柱阵列形貌有利于电解液的扩散及离子的迁移。Face-centered cubic(fcc)γ-molybdenum nitride(γ-Mo2N)thin film electrodes were prepared on Cu foil by direct current(DC)magnetron sputtering method.The influence of volume ratio of Ar and N2 on the morphology and electrochemical performance ofγ-Mo 2N was investigated by XRD,SEM,transmission electron microscopy(TEM)and galvanostatic discharge-charge tests.When the volume ratio of Ar and N2 was 4∶1,the prepared Mo2N thin film(named as Mo2N-4)electrode had the best electro-chemical lithium storage performance,which reversible capacity density was 87μAh/cm^2 at current density of 1000μA/cm^2.The porous nano-column array morphology was benefit to the diffusion of electrolyte and ions.

关 键 词：氮化钼(Mo2N) 薄膜电极 直流(DC)磁控溅射 锂离子电池 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]