Influencesof Electrolyte Formula on the Performance of Lithium Ion Batteries
碩士 === 國立成功大學 === 化學工程學系碩博士班 === 90 === In this research, ternary organic electrolyte consisting of ethylene carbonate (EC), propylene carbonate (PC) and diethylcarbonate (DEC) were prepared using the methodology of mixture design. The performance of the mixed electrolytes were tested via sealing th...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2002
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| Online Access: | http://ndltd.ncl.edu.tw/handle/697fjr |
| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 90 === In this research, ternary organic electrolyte consisting of ethylene carbonate (EC), propylene carbonate (PC) and diethylcarbonate (DEC) were prepared using the methodology of mixture design. The performance of the mixed electrolytes were tested via sealing the electrolyte into a coin cell. The results were fitted by empirical regression equation and then plotted as the contour diagrams. The data show that the maximum coulombic efficiency and the rate capability were appeared at point X1（EC：DEC＝3：2） . The results can be reasonably explained from the physical properties of these organic electrolyte.
Furthermore, we aslo studied the effect of the addition of 12-Crown-4 and Butane Sultone, respectively, for the performance of the lithium ion batteries. Results revealed that the addition of these two additives will reduce the irreversible capacitance of the first charge and discharge cycle. Cyclic voltammorgam shows 12-Crown-4 additive can prevent the decomposition of the electrolyte with the graphite and increase the reversible for intercalation and deintercalation of lithium ion.
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