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Method for preparing electrolyte for lithium-ferrous disulfide battery by one-step method

A ferrous disulfide and electrolyte technology, applied in the field of lithium primary batteries, can solve the problems of high price of anhydrous lithium iodide, easy introduction of moisture or new impurities, etc., and achieve good performance, reduce production costs, and reduce technological processes. Effect

Active Publication Date: 2015-12-23
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that this preparation method exists is: the one, and preparation or purchase anhydrous lithium iodide is expensive; The 2nd, this method is divided into two steps and causes preparation process to easily introduce moisture or new impurity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of one-step method prepares the method for the electrolyte solution of lithium-ferrous disulfide battery, comprises the steps:

[0030] Add 0.5 mol of anhydrous iodine to 1 L of ethylene glycol dimethyl ether and Stir evenly in the mixed solution of 1,3-dioxolane; then slowly add 0.5mol lithium aluminum hydride and stir for 1 hour, then raise the temperature to 40°C and stir for 2 hours, centrifuge and filter to obtain the lithium-sulfurous sulfide Electrolyte for iron batteries;

[0031] Wherein, in the mixed solution, ethylene glycol dimethyl ether accounts for 25 wt%, and 1,3-dioxolane accounts for 75 wt%, and the mixed solution is dehydrated by molecular sieves to a water content of ≤10 ppm before use.

[0032] The prepared electrolyte was tested, and its water content was 25.8ppm, and its conductivity at 25±2°C was 2.59ms / cm.

Embodiment 2

[0034] A method for preparing an electrolyte for a lithium-ferrous disulfide battery in one step, the method and steps are basically the same as in Example 1, except that 0.5 mol of lithium aluminum hydride is replaced by 2 mol of lithium hydride.

[0035] The prepared electrolyte was tested, its water content was 22.8ppm, and its conductivity at 25±2°C was 2.25ms / cm.

Embodiment 3

[0037] A kind of one-step method prepares the method for the electrolyte solution of lithium-ferrous disulfide battery, comprises the steps:

[0038] Add 1 mol of anhydrous iodine to 1 L of ethylene glycol dimethyl ether and 1 , Stir evenly in the mixed solution of 3-dioxolane; then slowly add 1mol lithium aluminum hydride and stir for 1 hour, then raise the temperature to 40°C and stir for 2 hours, centrifuge and filter to obtain the lithium-iron disulfide battery electrolyte;

[0039] Wherein, in the mixed solution, ethylene glycol dimethyl ether accounts for 25 wt%, and 1,3-dioxolane accounts for 75 wt%, and the mixed solution is dehydrated by molecular sieves to a water content of ≤10 ppm before use.

[0040] The prepared electrolyte was tested, its water content was 17.8ppm, and its conductivity at 25±2°C was 8.5ms / cm.

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Abstract

The invention belongs to the technical field of primary lithium batteries, and discloses a method for preparing electrolyte for a lithium-ferrous disulfide battery by a one-step method. The method comprises the following steps: in inert atmosphere, adding elemental iodine into an organic solvent and stirring the organic solvent evenly at 0-5 DEG C; adding lithium aluminum hydride or lithium hydride and carrying out stirring reaction for 1-2 hours; heating the mixture to 40-60 DEG C and carrying out stirring reaction for 1-2 hours; and centrifuging and filtering the mixture to obtain the electrolyte for the lithium-ferrous disulfide battery. According to the preparation method, the electrolyte for the lithium-ferrous disulfide battery is synthesized by the one-step method; and no water is introduced in the entire preparation process, so that the cost is relatively low; and the lithium-ferrous disulfide battery prepared from the electrolyte prepared by the method is good in property.

Description

technical field [0001] The invention belongs to the technical field of lithium primary batteries, and relates to an electrolyte solution for a lithium-ferrous disulfide battery, in particular to a method for preparing the electrolyte solution for a lithium-ferrous disulfide battery in one step. Background technique [0002] Lithium primary batteries are divided into high-voltage and low-voltage batteries according to the open circuit voltage. The open circuit voltage ≥ 3.0V is a high-voltage lithium primary battery, such as lithium-thionyl chloride (Li / SOCl 2 ) batteries, lithium-manganese dioxide (Li / MnO 2 ) battery and lithium-carbon lithium fluoride (Li / CF X ) battery; open circuit voltage <3.0V is a low-voltage lithium primary battery, such as lithium-iron disulfide (Li / FeS 2 )Battery. [0003] Due to Li / FeS 2 The battery is a low-voltage lithium primary battery, and its working voltage platform is 1.5V, so it is comparable to the alkaline manganese (Zn / MnO 2 ) b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16
CPCH01M6/166
Inventor 祝媛程琛王彦斌刘建华刘金成
Owner EVE ENERGY CO LTD
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