FeSb_2纳米棒的溶剂热合成与电化学脱嵌锂性能  

Solvothermal Synthesis and Electrochemical Lithiation/Delithiation Performance of FeSb_2 Nanorods

作　　者：秦海英[1] 谢健[1] 糜建立[1] 涂健[1] 赵新兵[1] 

机构地区：[1]浙江大学材料科学与工程系,硅材料国家重点实验室,杭州310027

出　　处：《物理化学学报》2006年第12期1555-1559,共5页Acta Physico-Chimica Sinica

摘　　要：用溶剂热法合成了作为一种新型锂离子电池负极材料的FeSb2纳米棒.高分辨透射电镜(HRTEM)观察表明,FeSb2纳米棒的直径为20～40nm,长度为0.2～1.0 μm.恒流充放电测试和循环伏安测试显示,FeSb2纳米棒首次可逆容量达到543 mAh·g-1,经过10次循环后,可逆容量保持在353 mAh·g-1.虽然首次库仑效率仅为64%,但仍明显优于FeSb2纳米颗粒,并在10次循环后基本稳定在90%.FeSb2纳米棒在循环过程中仍可能发生粉化和破裂,导致电极逐渐失效.FeSb2 nanorods, as a potential anode material for lithium-ion batteries, were prepared by solvotherrnal method in the present work. High-resolution transmission electron microscopy （HRTEM） observations show that the FeSb2 nanorods axe 20-40 nm in diameter and 0.2-1.0μm in length. The charge-discharge measurements and cyclic voltammetry tests reveal that the FeSb2 nanorods exhibit the high initial reversible capacity of 543 mAh·g^-1 and an approving cycling stability with 353 mAh·g^-1 after 10 cycles. Although the initial coulomb efficiency of the FeSb2 nanorods is only 64%, it is better than that of FeSb2 nano-particles and maintains at 90% after 10 cycles. However, the FeSb2 nanorods could be pulverized and cracked during the cyclic voltammetry test resulting in the failure of the electrode.

关 键 词：FeSb2纳米棒 溶剂热合成 负极材料 锂离子电池 

分 类 号：O611.3[理学—无机化学]