Mechanism for the synthesis of LiMn2O4 cathode material using citrate route
| Autor: | Shang-En Wu, 吳尚恩 |
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| Rok vydání: | 2002 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 90 Modified citrate routes were used to prepare nanocrystalline spinel lithium manganese oxides LiMn2O4 as the cathode materials for lithium ion batteries. Adjusting the pH of precursor solutions containing citric acid (CA), ethylene glycol (EG), and lithium and manganese ions makes the formation of LiMn2O4 much easier, which in turn improves the electrochemical performance of the resultant LiMn2O4 powders. To understand the effect of pH on the interactions between cations and CA, C13 NMR and Raman spectra were used to characterize the precursor solution. The spectra have shown that CA coordinated only to manganese ions in the Li/Mn/CA/EG solution, and lithium ions didn’t cause any effect on CA. With the adjustment of pH, the interactions between CA and manganese ions changed monotonically. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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