摘要
随着新能源的不断发展,对新型储能设备需求不断增加。可充电水系锌离子电池(ZIBs)因价格低廉、储量丰富和绿色环保等优点备受关注。五氧化二钒具有独特的层状结构,利于锌离子的嵌入/脱出。通过水热法制备V_(2)O_(5)、Ag_(0.3)V_(2)O_(5)(AVO)、Mg_(0.25)V_(2)O_(5)(MVO)并应用于水系锌离子电池中,XRD、SEM、TEM等测试分析了材料形貌和结构,金属Ag和Mg元素的掺杂有效改善了五氧化二钒纳米线形貌结构,并取得优异的电化学性能。深入探究电池内部反应机理,发现了Zn_(2)(V_(3)O_(8))2中间相形成对材料性能产生的影响。不同价态的离子掺杂对钒基氧化物形貌和电化学性能产生了不同的影响,体现的金属离子“支柱效应”显著改善了电池的容量和寿命。
With the development of new energy sources,the demand for new energy storage equip‐ment is increasing.The rechargeable aqueous zinc-ion batteries have attracted much attention due to its low price,abundant in reserves and green environmental protection.V_(2)O_(5) has a unique layered structure,which is conducive to the intercalation/deintercalation of zinc ion.V_(2)O_(5),Ag_(0.3)V_(2)O_(5)(AVO)and Mg_(0.25)V_(2)O_(5)(MVO)were prepared by hydrothermal method and applied in aqueous zinc ion batter‐ies.The doping of Ag and Mg effectively improves the morphology and structure of materials,and it obtains excellent electrochemical performance.The internal reaction mechanism of the batteries was explored,and we found the influence of the Zn_(2)(V_(3)O_(8))_(2) on the materials.The doping of different metal ions has different influence on vanadium oxides’morphology and electrochemical properties,and it shows that the metal ion"pillar effect"significantly improves the capacity and life of the battery.
作者
孙庆贺
胡靓
蔡宏琨
倪牮
张建军
SUN Qinghe;HU Liang;CAI Hongkun;NI Jian;ZHANG Jianjun(College of Electronic Information and Optical Engineering,Department of Electronic Science and Engineering,Nankai University,Tianjin 300350,China)
出处
《电源技术》
CAS
北大核心
2024年第4期718-724,共7页
Chinese Journal of Power Sources