碳微球/多孔VO_(2)(B)复合材料的水热合成及其电化学性能研究  

Hydrothermal synthesis and electrochemical properties of carbon microspheres/porous VO_(2)(B)composite materials

作　　者：杨子 娄有信[2] 曹晓润 尹蕊 娄广辉 张伟 Yang Zi;Lou Youxin;Cao Xiaorun;Yin Rui;Lou Guanghui;Zhang Wei(Henan Building Materials Research and Design Institute Co.,Ltd.,Zhengzhou 450002;School of Materials Science and Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353)

机构地区：[1]河南建筑材料研究设计院有限责任公司,郑州450002 [2]齐鲁工业大学(山东省科学院)材料科学与工程学院,济南250353

出　　处：《化工新型材料》2024年第5期146-149,共4页New Chemical Materials

基　　金：河南省科学院科研开发专项项目(220609099)。

摘　　要：钒氧化物及其复合材料是一种理想的锂离子电池电极材料。使用一步水热法合成了碳微球/多孔VO_(2)(B)复合材料,采用X射线衍射仪、扫描电子显微镜和电池测试系统对该复合材料的结构、形貌和电化学性能进行了表征测试。结果表明:碳微球/多孔VO_(2)(B)复合材料由无定型碳微球和由柔性弯曲的VO_(2)(B)纳米条自构筑的多孔VO_(2)(B)复合而成,当电流密度分别为0.5A/g、1A/g、2A/g和5A/g时,其放电比容量可分别达到748.4mAh/g、612.2mAh/g、457.5mAh/g和359.6mAh/g,经250次循环,其容量保持率可达90.7%(在5A/g时)。Vanadium oxide and its composite materials are ideal electrode materials for lithium-ion batteries.A carbon microspheres/porous VO_(2)(B)composite material was synthesized using one-step hydrothermal method.The structure,morphology,and electrochemical properties of the composite material were characterized and tested using X-ray diffraction,scanning electron microscopy,and battery testing systems.The results showed that carbon microspheres/porous VO_(2)(B)composite material was composed of amorphous carbon microspheres and porous VO_(2)(B)self-constructed from flexible bent VO_(2)(B)nanobelts.When the current densities were 0.5A/g,1A/g,2A/g,and 5A/g,the discharge specific capacities could reach 748.4mAh/g,612.2mAh/g,457.5mAh/g,and 359.6mAh/g,respectively.After 250 cycles,the capacity retention rate could reach 90.7%(at 5A/g).

关 键 词：碳微球 多孔VO_(2)(B) 水热法 电化学 

分 类 号：TQ152[化学工程—电化学工业] TB34[一般工业技术—材料科学与工程]