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Lithium-ion rechargeable accumulators including an ionic liquid electrolyte

A technology for ionic liquids and storage batteries, applied in the field of lithium-ion storage batteries or batteries, electrolytes of ionic liquid solvents and conductive salts, batteries, and lithium-ion storage batteries, to achieve performance improvement and electrochemical performance improvement

Inactive Publication Date: 2011-07-27
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a danger of thermal degradation problems

Method used

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  • Lithium-ion rechargeable accumulators including an ionic liquid electrolyte
  • Lithium-ion rechargeable accumulators including an ionic liquid electrolyte
  • Lithium-ion rechargeable accumulators including an ionic liquid electrolyte

Examples

Experimental program
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Embodiment 1

[0204] Electrolytes comprising ionic liquids, lithium salts and organic additives suitable for application, use according to the invention were prepared.

[0205] ο the ionic liquid is PP 13 TFSI, or N, N-propyl-methylpiperidinium bis(trifluoromethanesulfonyl)imide salt;

[0206] o the lithium salt is LiTFSI;

[0207] o The organic additive is vinyl ethylene carbonate.

[0208] By adding 1.6mol / L LiPF 6 dissolved in the ionic liquid solvent, and subsequently formulated the electrolyte by adding 2%, 5%, 10% and 20% by volume of organic additives, respectively: these were based on the volume of the ionic liquid added to the lithium salt powder as 2 by volume %, 5%, 10% or 20%.

Embodiment 2

[0210] Electrolytes comprising ionic liquids, lithium salts and organic additives suitable for application, use according to the invention were prepared.

[0211] o The ionic liquid is HMITFSI or 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt.

[0212] o The lithium salt is LiTFSI, or lithium hexafluorophosphate.

[0213] o The organic additive is vinyl ethylene carbonate (VEC).

[0214] The electrolyte was prepared by dissolving 1.6 mol / L of LiTFSI in the ionic liquid solvent and then by adding 2% and 5% by mass of organic additives, respectively.

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Abstract

The present invention relates to a lithium-ion rechargeable accumulator including a negative electrode in which the active material is graphite carbon, a positive electrode in which the active material is LiFePO4, and an ionic liquid electrolyte containing at least one ionic liquid of the formula C+A- in which C+ is a cation and A- is an anion, and at least one conducting salt, wherein the ionic liquid electrolyte further includes an organic additive consisting of vinyl ethylene carbonate (VEC).

Description

technical field [0001] The present invention relates to lithium ion rechargeable batteries (or secondary batteries) comprising a liquid electrolyte. [0002] More specifically, the present invention relates to lithium ion accumulators, batteries comprising: graphite carbon (made of graphite carbon) negative electrodes and LiFePO 4 (lithium iron phosphate) (composed of LiFePO 4 fabricated) a positive electrode comprising a liquid electrolyte, more specifically an electrolyte comprising an ionic liquid solvent and a conductive salt. [0003] The liquid electrolyte of the accumulator according to the invention can thus be referred to as an ionic liquid electrolyte. [0004] The present invention more particularly relates to a lithium ion rechargeable battery (or secondary battery) whose liquid electrolyte comprises an ionic liquid solvent and a lithium salt. [0005] The invention provides its use in the field of electrochemical storage, especially in the field of lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/42H01M10/0525
CPCH01M10/4235H01M2300/0022H01M10/0567H01M4/133Y02E60/122H01M4/5825H01M10/0525H01M2/0222H01M2300/0091H01M4/587H01M50/109Y02E60/10Y02P70/50
Inventor 内莉·吉劳德埃莱娜·劳奥尔特
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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