کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1291238 | 973348 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical characterization of Li2MnO3–Li[Ni1/3Co1/3Mn1/3]O2–LiNiO2 cathode synthesized via co-precipitation for lithium secondary batteries Electrochemical characterization of Li2MnO3–Li[Ni1/3Co1/3Mn1/3]O2–LiNiO2 cathode synthesized via co-precipitation for lithium secondary batteries](/preview/png/1291238.png)
Various compositions of the xLi2MnO3–yLi[Ni1/3Co1/3Mn1/3]O2–zLiNiO2 electrode system were synthesized using metal oxide precursor by adopting co-precipitation method. XRD revealed that the prepared cathode materials possess α-NaFeO2 structure with R3¯m space group. Scanning electron micrographs demonstrated the morphology of all the synthesized samples, wherein spherical agglomerates with size of 5–10 μm have been acknowledged. Among the tested samples, Li[Li0.18Ni0.220Co0.120Mn0.480]O2 shows the excellent capacity retention (95.6%) in the voltage range of 2.0–4.6 V and the better rate capability than the other samples. But, on the other hand, Li[Li0.20Ni0.133Co0.133Mn0.534]O2 (x = 0.6, y = 0.4 and z = 0.0) shows the highest discharge capacity. However, the capacity retention of the material at 50 mA g−1 is lower than that of Li[Li0.18Ni0.220Co0.120Mn0.480]O2. Furthermore, the capacity retention at 1250 mA g−1 is only 42.6% of the capacity obtained at 20 mA g−1.
Journal: Journal of Power Sources - Volume 189, Issue 1, 1 April 2009, Pages 571–575