钒酸钠中钠离子脱嵌诱导结构相变的电子显微学表征  

Electron microscopy characterization of structural evolution caused by sodium ion migration in sodium vanadate

作　　者：杜文龙 赵培丽 赵振 王怀远 唐真 贾双凤 郑赫 王建波 DU Wenlong;ZHAO Peili;ZHAO Zhen;WANG Huaiyuan;TANG Zhen;JIA Shuangfeng;ZHENG He;WANG Jianbo(School of Physics and Technology,Center for Electron Microscopy,MOE Key Laboratory of Artificial Micro-and Nano-structures,and Institute for Advanced Studies,Wuhan University,Wuhan Hubei 430072;Core Facility of Wuhan University,Wuhan Hubei 430072,China)

机构地区：[1]武汉大学物理科学与技术学院,电子显微镜中心,人工微结构教育部重点实验室和高等研究院,湖北武汉430072 [2]武汉大学科研公共服务条件平台,湖北武汉430072

出　　处：《电子显微学报》2024年第4期413-421,共9页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(Nos.12374014,52071237,12074290,52101021);湖北省青年拔尖人才计划;湖北省杰出青年科学基金资助项目(No.2024AFA063);中央高校基本科研业务费专项资金(No.2042023kf0172);武汉大学科研公共服务条件平台支持项目.

摘　　要：本文采用溶胶-凝胶法结合固相烧结法制备了钒酸钠纳米线,通过X射线衍射学和电子显微学确定了制备产物为层状结构Na_(1.25)V_(3)O_(8)和通道结构NaV_(6)O_(15)。利用电子束辐照诱导钠离子脱嵌对Na_(1.25)V_(3)O_(8)和NaV_(6)O_(15)的结构稳定性进行了研究。结果表明,Na_(1.25)V_(3)O_(8)和NaV_(6)O_(15)经电子束辐照后均会转化成岩盐结构的VO。论文结果有助于理解钠离子脱嵌对钠离子电池正极材料结构稳定性的影响机理,为高性能钠离子电池的复杂设计提供参考。This study highlighted the synthesis and structural evolution of sodium vanadate nanowires using a sol⁃gel method combined with solid⁃state sintering.The materials were identified as layered Na_(1.25)V_(3)O_(8)and tunnel⁃structured NaV_(6)O_(15)through X⁃ray diffraction(XRD)and transmission electron microscopy(TEM).The structural evolutions due to sodium ion deintercalation induced by e⁃beam irradiation was investigated.Both Na_(1.25)V_(3)O_(8)and NaV_(6)O_(15)transformed into a rock salt⁃structured vanadium oxide(VO)after e⁃beam irradiation.This study contributes to the fundamental understanding of the material science involved in sodium⁃ion batteries,which is vital for advancing energy storage technologies.

关 键 词：钒酸钠 电子束辐照 相变 透射电子显微学(TEM) 

分 类 号：TG115.215.3[金属学及工艺—物理冶金] O766.1[金属学及工艺—金属学] O799[理学—晶体学] O722.4[电子电信—物理电子学] O739TN16