二维层状氮化二钙作为钠离子电池负极材料  

Two-Dimensional Layered Dicalcium Nitride as Anode Material for Sodium Ion Batteries

作　　者：陈光海[1] 白莹[1] 吴锋[1,2] 吴川 

机构地区：[1]北京理工大学材料学院,环境科学与工程实验室,北京重点实验室,北京100081 [2]北京市电动汽车协同创新中心,北京100081

出　　处：《应用化学》2018年第3期366-368,共3页Chinese Journal of Applied Chemistry

基　　金：国家973计划(2015CB251100)资助项目

摘　　要：以Ca_3N_2为前驱体,用高温热解法制备了2D层状结构Ca_2N并用X射线和扫描电镜对Ca_2N的组成、结构和形貌进行了表征。作为钠离子电池新型负极材料,在50 m A/g电流密度充放电,首次放电比容量可达584 m A·h/g,可逆比容量达180 m A·h/g。在2000 m A/g大电流密度下,仍有70 m A·h/g。Two-dimensional layered Ca2N was synthesized via a pyrolysis method with Ca3N2 precursor. The component,structure and morphology of Ca2N were characterized by X-ray diffraction and scanning electron microscope. As a novel anode material of sodium ion batteries,the initial discharge capacity is up to584 m A·h/g and the reversible capacity is about 180 m A·h/g at a current density of 50 m A/g. Even at a high current density of 2000 m A/g,a capacity of 70 m A·h/g can be retained.

关 键 词：氮化二钙 二维层状结构 钠离子电池 负极材料 

分 类 号：O646.5[理学—物理化学]