摘要
金属有机框架(Metal-Organic Frameworks,MOFs)因为大的比表面积、高的孔隙率以及结构可调等特点使其在电化学领域受到广泛关注。采用水热法合成钒基金属有机框架材料(V-MOF),研究水热时间对V-MOF晶相组成、显微结构以及V-MOF基水系锌离子电池(Aqueous zinc-ion batteries,AZIBs)性能的影响。结果表明:水热时间为36 h时,所得的V-MOF材料为中空棒状结构,V的价态为+4,将其作为AZIBs正极的电化学性能最佳,在100 mA·g^(-1)的电流密度下提供了144.5 mAh·g^(-1)的比容量。在电流密度为1000 mA·g^(-1)时,充放电循环4000次后,其库伦效率仍为100%。
Metal-organic frameworks(MOFs)have received much attention in the field of electrochemistry owing to their high specific surface area,adjustable aperture and tunable structure.A typical V-MOF was synthesized by using hydrothermal methods,where the effects of hydrothermal time on crystalline phase composition and microstructure of V-MOF and its performance for aqueous zinc-ion batteries(AZIBs)were explored.The resulting V-MOF material,a hollow nanorod with a valence of+4 for V after hydrothermal reaction for 36 h,has the highest electrochemical performance as an anode for AZIBs,with a specific capacity of 144.5 mAh·g^(-1)at a current density of 100 mA·g^(-1).At a current density of 1000 mA·g^(-1),the Coulomb efficiency remained at 100%after 4000 charge/discharge cycles.
作者
郭平春
韩星
江和栋
李家科
范学运
黄丽群
孙健
王艳香
GUO Pingchun;HAN Xing;JIANG Hedong;LI Jiake;FAN Xueyun;HUANG Liqun;SUN Jian;WANG Yanxiang(Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China)
出处
《陶瓷学报》
CAS
北大核心
2023年第5期920-927,共8页
Journal of Ceramics
关键词
水系锌离子电池
钒的金属有机框架
正极
水热合成
电化学性能
aqueous zinc-ion batteries
vanadium based metal-organic framework
cathode
hydrothermal synthesis
electrochemical performance
