The Study of Lithium Vanadium Phosphate Battery with Polymer Electrolyte
| Autor: | Cheng-Han Wen, 温承翰 |
|---|---|
| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Cathode material lithium vanadium phosphate (Li3V2(PO4)3) is synthesized through sol-gel route followed by high temperature sintering. The lithium ion batteries in this study are composed of metallic lithium as anode and polymer gel electrolyte that mixed with different amounts of α-Al2O3 nanoparticles. For the batteries using liquid electrolyte, a stable charge capacity 128mAh / g is obtained during the charge-discharge process for recycling 50 times. For the gel electrolyte batteries, we found that the charge and discharge capacities can be improved by adding α-Al2O3 particles. The highest charge voltage for gel electrolyte batteries is 4.7V which corresponds to charge three lithium ions. However, the charge capacity is decreased with the numbers of charge-discharge cycles. The stability of charge-discharge is improved by setting charging limit to 4.3V which corresponds to charge two lithium ions. The analysis of the AC impedance results indicates that adding α-Al2O3 can reduce the charge transfer resistance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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