(浙江大學 材料科學和工程系， 杭州 310027)
摘 要: 采用懸浮熔煉和球磨制備了NiSb2合金粉末， 并研究了它的電化學吸放鋰性能。研究結果表明， NiSb2 的吸放鋰平臺分別在0.8V和1.0V。 在20mA·g-1的電流密度下，首次可逆容量達到494mAh·g-1, 經過15個循環(huán)后， 仍保持242mAh·g-1的可逆容量。在研究中發(fā)現， 增大電流密度將導致可逆容量的下降。
關鍵字: 鋰離子電池； 負極材料； NiSb2； 金屬間化合物
ZHAO Ming-jian
（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
