Application of nonflammable electrolyte with room temperature ionic liquids (RTILs) for lithium-ion cells
| Autor: | Hajime Matsumoto, Hikari Sakaebe, Kuniaki Tatsumi, Suguru Kozono, Toshiyuki Nukuda, Yoshihiro Katayama, Yukiko Fujino, Hiroe Nakagawa |
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| Rok vydání: | 2007 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Electrolyte Lithium-ion battery Lithium battery chemistry.chemical_compound chemistry Ionic liquid Electrode Lithium Graphite Electrical and Electronic Engineering Physical and Theoretical Chemistry Carbon |
| Zdroj: | Journal of Power Sources. 174:1021-1026 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2007.06.133 |
| Popis: | A mixture of flammable organic solvent and nonflammable room temperature ionic liquid (RTIL) has been investigated as a new concept electrolyte to improve the safety of lithium-ion cells. This study focused on the use of N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide (PP13-TFSI) as the RTIL for the flame-retardant additive. It was found that a carbon negative electrode, both graphite and hard carbon, could be used with the mixed electrolyte. A 383562-size lithium-ion trial cell made with the mixed electrolyte showed good discharge capacity, which was equivalent to a cell with conventional organic electrolyte up to a discharge current rate of complete discharge in 1 h. Moreover, the mixed electrolyte was observed to be nonflammable at ionic liquid contents of 40 mass% or more. Thus the mixed electrolyte was found to realize both nonflammability and the good discharge performance of lithium-ion cells with carbon negative electrodes. These results indicate that RTILs have potential as a flame-retardant additive for the organic electrolytes used in lithium-ion cells. |
| Databáze: | OpenAIRE |
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