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Electrolyte for lithium battery and lithium battery using the electrolyte

An electrolyte and lithium battery technology, applied in primary batteries, lithium storage batteries, secondary batteries, etc., can solve problems such as high self-discharge rate, excessive growth, and battery failure.

Active Publication Date: 2014-05-21
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some cases, such as after long-term storage at room temperature and high temperature storage, the passivation film tends to overgrow, resulting in severe passivation and high self-discharge rate of the battery, causing battery failure

Method used

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  • Electrolyte for lithium battery and lithium battery using the electrolyte
  • Electrolyte for lithium battery and lithium battery using the electrolyte
  • Electrolyte for lithium battery and lithium battery using the electrolyte

Examples

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Embodiment 1

[0031] An embodiment of the electrolyte solution for lithium batteries of the present invention, the electrolyte solution described in this embodiment is used for lithium / thionyl chloride batteries, the electrolyte solution contains a conventional electrolyte solution and a pyridine ionic liquid, and the pyridine ionic liquid contains Cation and anion, the cation is N-butylpyridine, the anion is aluminum tetrachloride ion, and the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte, the volume percentage of pyridine ionic liquid in the electrolyte is 1%. The electrolyte solution of this embodiment is prepared by the following method:

[0032] (1) Pre-electrolysis: Use high-purity aluminum sheets for the positive and negative electrodes in an anhydrous environment, connect to a regulated power supply with a voltage of 1.08V, and perform electrolysis for 24 hours to remove the moisture in the pyridine-based...

Embodiment 2

[0035] An embodiment of the electrolyte solution for lithium batteries of the present invention, the electrolyte solution described in this embodiment is used for lithium / thionyl chloride batteries, the electrolyte solution contains a conventional electrolyte solution and a pyridine ionic liquid, and the pyridine ionic liquid contains Cation and anion, the cation is N-n-butylpyridine, the anion is tetrachlorogallate ion, and the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte, the volume percentage of pyridine ionic liquid in the electrolyte is 5%. The preparation method of the electrolyte solution of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0037] An embodiment of the electrolyte solution for lithium batteries of the present invention, the electrolyte solution described in this embodiment is used for lithium / thionyl chloride batteries, the electrolyte solution contains a conventional electrolyte solution and a pyridine ionic liquid, and the pyridine ionic liquid contains Cation and anion, the cation is N-picoline, the anion is bis(trifluoromethylsulfonyl)imide anion, and the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte, the volume percentage of pyridine ionic liquid in the electrolyte is 10%. The preparation method of the electrolyte solution of this embodiment is the same as that of Embodiment 1.

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Abstract

The invention discloses an electrolyte for a lithium battery. The electrolyte contains a pyridine ionic liquid, and the pyridine ionic liquid contains cations and anions; the cations are N-alkylpyridine; the anions are one kind of the anions of a group consisting of aluminum tetrachloride acid radical ions, gallium tetrachloride acid radical ions, tetrafluoroboric acid anions, hexafluorophosphoric acid anions, bis(trifluoromethanesulphonyl)imine anions, lactic acid anions, p-methyl benzene sulfonate acid radical anions, acetyl sulfonyl imide anions, saccharin anions, amino acids anions, sulfuric acid ester anions, succinic acid diisooctyl ester sulfonate radical anions, 4,5-dimetridazloe anions, and 5-nitrotetrazolato anions. The electrolyte can inhabit increasement of a metal lithium surface passivatin layer (an SEI film) in the lithium battery, and can significantly improve storage performance of the battery. Furthermore, the invention further discloses a preparation method for the electrolyte and the lithium battery containing the electrolyte.

Description

technical field [0001] The invention relates to an electrolyte solution for a lithium battery and a lithium battery containing the electrolyte solution, in particular to an electrolyte solution for a lithium / thionyl chloride battery or a lithium / manganese dioxide battery or a lithium / carbon fluoride battery And a lithium battery using the electrolyte. Background technique [0002] Lithium batteries are widely used in instrumentation, memory power supply, military, oil drilling and other fields due to their high energy, low self-discharge rate, long storage life and environmental protection. [0003] In a lithium battery, after metal lithium contacts with the electrolyte, a passivation layer (SEI film) will be formed on the surface of the lithium metal. discharge rate and long storage life. However, in some cases, such as after long-term storage at room temperature and high temperature storage, the passivation film tends to overgrow, resulting in severe passivation and high...

Claims

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Application Information

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IPC IPC(8): H01M6/16
CPCH01M6/168H01M2300/0017H01M10/052H01M10/0569H01M2300/0045Y02E60/10
Inventor 曹浪袁中直刘金成
Owner EVE ENERGY CO LTD
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