摘要
A series of single phase LixNi0.8-yCo-（0.2）ZnyOp （0.96 ≤ x ≤ 1.10, 0 ≤ y ≤ 0.05, 2 ≤ p ≤ 2（1+ y） ） （different in the y values） were synthesized by a two step solid state reaction method, in which LiOH· H2O, Zn doped spherical Ni（OH）2 and Co2O3 were used as the precursors. The ICP AES analyses proved that the Zn doped compounds synthesized had the nonstoichiometric form. The results of the XRD, SEM identified that the uniform particles of the as prepared materials having a good layered structure were fine, narrowly distributed and well crystallized. The electrochemical performance test was carried out and the results showed that the as prepared Zn doped materials had not only a high capacity, but also a better cycling stability characterization than the un doped one. The Li1.06Ni0.75Co0.22Zn0.03O2.03 material has an initial reversible capacity as high as 160.5mAh· g- 1; and a first discharge efficiency 89.2% , and exhibits satisfactory cyclic stability with 90% retainable capacity after 50 cycles.
A series of single-phase LixN0.8-yCo0.2ZnyOp (0.96 less than or equal to x less than or equal to 1. 10, 0 less than or equal to y less than or equal to 0.05, 2 less than or equal to p less than or equal to 2 (1 + y)) (different in the y values) were synthesized by a two-step solid state. reaction method, in which LiOH (.) H2O, Zn-doped spherical Ni(OH)(2) and Co2O3 were used as the precursors. The ICP-AES analyses proved that the Zn-doped compounds synthesized had the nonstoichiometric form. The results of the XRD, SEM identified that the uniform particles of the as-prepared materials having a good layered structure were fine, narrowly distributed and well crystallized. The electrochemical performance test was carried out and the results showed that the as-prepared Zn-doped materials had not only a high capacity, but also a better cycling stability characterization than the un-doped one. The Li1.06Ni0.75Co0.22Zn0.03O2.03 material has an initial reversible capacity as high as 160. 5mAh g(-1); and a first discharge efficiency 89.2%, and exhibits satisfactory cyclic stability with 90% retainable capacity after 50 cycles.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2003年第4期423-427,共5页
Chinese Journal of Inorganic Chemistry
基金
重庆永固实业有限公司的资助
