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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 batteries, secondary batteries, etc., can solve problems such as potential safety hazards and limited improvement range, and achieve the effects of avoiding potential safety hazards, increasing electrical conductivity, and high conductivity

Inactive 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

But the improvement is limited, because the battery reaction rate is also controlled by the mass transfer rate of the electrolyte
In addition, from the perspective of battery structure design, the electrode reaction area is increased, and thinner and longer pole pieces are used to increase the battery discharge voltage, but this will bury serious safety hazards.

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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Effect test

Embodiment 1

[0028]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 an imidazole ionic liquid, and the imidazole ionic liquid contains Cation and anion, the cation is 1-methyl-3-ethylimidazolium, the anion is aluminum tetrachloride ion (AlCl 4 - ), the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte. In the electrolyte solution in this embodiment, the volume percentage of the imidazole-based ionic liquid is 5%. The electrolyte solution of this embodiment is prepared by the following method:

[0029] (1) Pre-electrolysis: In an anhydrous environment (moisture content <0.1%), use high-purity aluminum sheets for the positive and negative electrodes, connect the regulated power supply, and the voltage ...

Embodiment 2

[0032] 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 an imidazole ionic liquid, and the imidazole ionic liquid contains Cation and anion, the cation is 1-methyl-3-propylimidazole, the anion is tetrafluoroborate anion, and the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte. In the electrolyte solution in this embodiment, the volume percentage of the imidazole-based ionic liquid is 1%. The preparation method of the electrolyte solution of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0034] 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 an imidazole ionic liquid, and the imidazole ionic liquid contains Cation and anion, the cation is 1-methyl-3-butylimidazole, the anion is hexafluorophosphate anion, and the conventional electrolyte is LiAlCl with a concentration of 1.5M 4 -SOCl 2 Lithium / thionyl chloride conventional electrolyte. In the electrolyte solution in this embodiment, the volume percentage of the imidazole-based ionic liquid 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; and the anions are one kind of the anions of a group consisting of halite 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 change the reaction mechanism of the battery, improve the reduction rate of a cathode active material and the mass transfer rate of the electrolyte, and increase the electrical conductivity of the electrolyte, so the discharge voltage of the lithium battery is improved. 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 using 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 using the electrolyte liquid lithium battery. 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] At present, lithium batteries seen on the market can generally be divided into two types: capacity type and power type. The former has a higher capacity density but has poor high-current discharge capability, and is generally used in a low-current working mode for a long time. The latter has the ability to discharge a relatively large current, but its capacity density is relativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/058
CPCH01M6/168H01M2300/0017H01M10/052H01M10/0567H01M10/4235Y02E60/10Y02P70/50
Inventor 曹浪袁中直刘金成
Owner EVE ENERGY CO LTD
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