(浙江大学 材料科学和工程系， 杭州 310027)
摘 要: 采用悬浮熔炼和球磨制备了NiSb2合金粉末， 并研究了它的电化学吸放锂性能。研究结果表明， NiSb2 的吸放锂平台分别在0.8V和1.0V。 在20mA·g-1的电流密度下，首次可逆容量达到494mAh·g-1, 经过15个循环后， 仍保持242mAh·g-1的可逆容量。在研究中发现， 增大电流密度将导致可逆容量的下降。
关键字: 锂离子电池； 负极材料； NiSb2； 金属间化合物
（Department of Materials Science and Engineering, Zhejiang University,
Hangzhou 310027, China）
Abstract:Intermetallic compound NiSb2 powder are prepared by levitation melting and ball-milling. The electrochemical lithium absorption / release properties of NiSb2 as a new lithium-ion batteries anode material were investigated. The experiments show the lithium absorption / release plateaus are at 0.8V and 1.0V respectively. It is found that the first reversible capacity of NiSb2 electrode reaches 494mAh·g-1 at a current density of 20mA·g-1, and the capacity of about 242mAh·g-1is still maintained even after 15 times cycling. But we also find that the reversible capacity decreases at the increased charge-discharge current density.
Key words: lithium ion battery; anode material; NiSb2; intermetallic compound
