Yttrium-doped Li(Ni, Co)O2: an improved cathode for Li-ion batteries
| Autor: | B.V.R. Chowdari, G.V. Subba Rao, H.J. Lindner |
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| Rok vydání: | 2001 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Doping Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Yttrium Cathode Ion law.invention Anode chemistry.chemical_compound chemistry law Electrode Thermal stability Lithium oxide Electrical and Electronic Engineering Physical and Theoretical Chemistry |
| Zdroj: | Journal of Power Sources. :313-315 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/s0378-7753(01)00683-8 |
| Popis: | Yttrium-doped mixed oxides, Li(Ni 0.7− y Y y Co 0.3 )O 2 , y =0.00–0.05 have been synthesized and characterized. Their cathodic behavior has been examined in cells with lithium metal as anode. The limit for Y solubility is ≤0.05. The beneficial effect of Y is evident by way of increased capacity — retention during charge–discharge cycling, up to 100 cycles at 0.2 C rate and up to 50 cycles at 1 C rate. Cyclic voltammograms indicate that the phase transitions which usually occur in LiNiO 2 during cycling, are suppressed by Co- and Y-doping but not completely eliminated. A reduced hysteresis in the anodic and cathodic peak voltages observed for y =0.05 is an indication of excellent reversibility of the electrode. Thermal stability of the charged cathode is not, however, improved by Y-doping. |
| Databáze: | OpenAIRE |
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