ELECTROLYTE AND AND LITHIUM-ION BATTERY
The present invention provides an electrolyte and a lithium-ion battery. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, the additive comprises one or two selected from a group consisting of methylene methanedisulfonate and ethylene sulfate, the lithium salt...
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Sprache: | eng ; fre ; ger |
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Zusammenfassung: | The present invention provides an electrolyte and a lithium-ion battery. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, the additive comprises one or two selected from a group consisting of methylene methanedisulfonate and ethylene sulfate, the lithium salt comprises lithium bis(fluorosulfonyl)imide, a content of the lithium bis(fluorosulfonyl)imide is 5%¼15% of a total weight of the electrolyte. The methylene methanedisulfonate and/or the ethylene sulfate may significantly decrease the impedance of the SEI membrane, the lithium bis(fluorosulfonyl)imide may improve the stability and the conductivity of the electrolyte and also inhibit the formation of hydrofluoric acid, so as to prevent the non-aqueous organic solvent from being oxidized and decomposed by the hydrofluoric acid and also inhibit the dissolving-out of the metal ions in the positive active material, therefore the lithium-ion battery may have advantages such as excellent low temperature performance, excellent rapid charging performance and long cycle life. |
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