| Autor: |
Tang, Hongwei, Zhao, Fushuang, Chang, Zhao-rong, Yuan, Xiao-Zi, Wang, Haijiang |
| Předmět: |
|
| Zdroj: |
Journal of The Electrochemical Society; 2009, Vol. 156 Issue 6, pA478-A482, 5p, 1 Black and White Photograph, 1 Chart, 5 Graphs |
| Abstrakt: |
LiNi[sub0.8]Co[sub0.2-x]T[subx]O[sub2](0 ⩽ x ⩽ 0.1) powders with a high tap density have been successfully prepared using a eutectic molten salt of 0.62LiNO[sub3]-0.38LiOH, with a melting point of 175.7°C, and Co-doped Ni(OH)[sub2] and TiO[sub2], where the ratio of Li/(Ni + Co + Ti) is controlled at 1.1:1. The tap density of the synthesized LiNi[sub0.8]Co[sub0.2-x]T[subx]O[sub2] reaches 3.17 g cm[sup-3]. X-ray diffraction analysis shows that this material has a well-developed layered structure. Scanning electron microscopy indicates that the synthesized particles distribute evenly. Charge-discharge tests demonstrate that the LiNi[sub0.8]Co[sub0.15]Ti[sub0.05]O[sub2] cathode prepared at 800°C has an initial discharge capacity as high as 169 mAh g[sup-1] and excellent capacity retention at a current density of 0.2 C in the range of 3.0-4.3 V. A capacity of 161 mAh g[sup-1] is retained after 50 charge-discharge cycles, with a capacity retention of 95.3%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
