【摘要】 以Ca₃N₂为前驱体,用高温热解法制备了2D层状结构Ca₂N并用X射线和扫描电镜对Ca₂N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。更多还原

【Abstract】 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.更多还原