Electrolyte solution capable of improving air expansion of soft roll lithium manganese battery

A soft-packed lithium-manganese battery and electrolyte solution technology, which is applied in the direction of electrical components, secondary batteries, circuits, etc., can solve the problems affecting the thickness of the soft-packed lithium-manganese battery and cannot be used, so as to ensure the working capacity, improve flatulence, Effect of preventing oxidative decomposition

Inactive Publication Date: 2012-01-04
BASF BATTERY MATERIALS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the thickness of the general soft-packed lithium-manganese battery is relatively thin, and its application field is generally used at a relatively high temperature, if a conventional electrolyte system is used, gas will be generated due to the reaction between the electrolyte and the negative electrode, and these gases will further affect the soft battery. The thickness of the lithium-manganese battery makes it impossible to apply

Method used

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  • Electrolyte solution capable of improving air expansion of soft roll lithium manganese battery
  • Electrolyte solution capable of improving air expansion of soft roll lithium manganese battery
  • Electrolyte solution capable of improving air expansion of soft roll lithium manganese battery

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A 750mAh 284646 soft-pack lithium-manganese battery was prepared, filled with electrolytes with different additive contents, stored at 60 degrees for 6 weeks, and tested for its thickness change and capacity change at room temperature 0.2C when the relative addition amount was 0%. The standard electrolyte is 1M LiClO4 / PC-DME (1:1, vol), and the additive is 1,3 propane sultone.

[0020] See Table 1 below for details:

[0021] Additive amount Thickness expansion (60°C for 6 weeks) Normal temperature discharge (recorded as 100% when 0% is added) 0% 30% 100.0% 1% 7.8% 99.9% 2% 4.9% 99.7% 3% 2.8% 99.5% 5% 2.6% 98.6% 7% 2.0% 98.0% 10% 1.5% 97.0%

Embodiment 2

[0023] A 750mAh 284646 soft-pack lithium-manganese battery was prepared, filled with electrolytes with different additive contents, stored at 60 degrees for 6 weeks, and tested for its thickness change and capacity change at room temperature 0.2C when the relative addition amount was 0%. The standard electrolyte is 1M LiClO4 / PC-DME-DXL (1:1:1, vol), and the additive is vinyl sulfate.

[0024] See Table 2 below for details:

[0025] Additive amount Thickness expansion (60°C for 6 weeks) Normal temperature discharge (recorded as 100% when 0% is added) 0% 35% 100.0% 1% 8.8% 99.8% 2% 5.3% 99.5% 3% 3.2% 99.2% 5% 2.4% 98.5% 7% 2.0% 98.0% 10% 1.8% 97.5%

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Abstract

The invention relates to electrolyte solution of a lithium manganese battery, in particular to electrolyte solution capable of improving air expansion of a soft roll lithium manganese battery. The electrolyte solution consists of three components, namely (1) lithium salt, (2) a carbonic ester and/or ether organic solvent and (3) 0.01 to 20 mass percent of additive, wherein the molar concentration of the lithium salt in the electrolyte solution is 0.01 to 2 moles/liter; and the additive is a sulfinyl-containing and/or sulfonyl-containing compound. The additive compound in the electrolyte solution is decomposed before the organic solvent of the electrolyte solution to form a passivation layer on the surface of an electrode, so that gas generation due to the decomposition of the organic solvent of the electrolyte solution is restrained, and the aim of improving the air expansion of the soft roll lithium manganese battery is fulfilled.

Description

technical field [0001] The invention relates to an electrolyte solution for a lithium-manganese battery, in particular to an electrolyte solution for improving flatulence of a soft-packed lithium-manganese battery. Background technique [0002] Lithium manganese dioxide battery, hereinafter referred to as lithium manganese battery, belongs to primary lithium battery. Lithium-manganese batteries have the advantages of high discharge current, pulse discharge capability, and no voltage hysteresis, accounting for nearly 50% of primary lithium batteries, and are widely used in smart meters, electronic security and RFID and other fields. The common forms of lithium-manganese batteries are cylindrical lithium-manganese and button-type lithium-manganese batteries. Now lithium-manganese batteries have developed into a new form: soft-pack lithium-manganese batteries. This development has greatly expanded the application fields of lithium-manganese batteries, such as in intelligent tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCY02E60/10
Inventor 袁芳胡学山周小进顾红健
Owner BASF BATTERY MATERIALS SUZHOU
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