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Les liquides ioniques, des électrolytes innovants pour sécuriser les batteries lithium-ion

Abstract : Lithium-ion batteries are dominating nomad devices market, thus their safety must more than ever be carefully studied. Accordingly, replacing actual electrolytes (flammable and volatile carbonate mixtures) by hardly flammable and nonvolatile ionic liquids (IL) could be safer. However, little examination of the stability of ionic liquids under abuse conditions (fire, shortcut, overcharge…) was reported. This work investigates thermal stability of electrolytes based on carbonates and two IL. These IL are stable up to 300°C and are weakly combustible. However combustion tests revealed the emission of toxic or flammable species, requiring specific attention depending on the application. Based on this work, these IL-based electrolytes can be considered safer than carbonates and contribute to safety improvement in batteries.
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Léa Chancelier, Catherine Santini, Alpha-Oumar Diallo, Guy Marlair, Thibaut Gutel. Les liquides ioniques, des électrolytes innovants pour sécuriser les batteries lithium-ion. L'Actualité Chimique, Société chimique de France, 2014, pp.42-44. ⟨ineris-01862413⟩

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