A kind of preparation method for the electrolytic solution of lithium-iron disulfide battery

A ferrous disulfide, electrolyte technology, applied in non-aqueous electrolyte batteries, organic electrolyte batteries and other directions, can solve the problems of easy introduction of moisture or new impurities, high price of anhydrous lithium iodide, etc., to reduce production costs. , good performance, reducing the effect of process flow

Active Publication Date: 2018-01-09
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

[0026] A preparation method for an electrolyte of a lithium-iron disulfide battery, comprising the steps of:

[0027] Add 0.5mol of anhydrous aluminum triiodide to 1L of ethylene glycol dimethyl in a glove box with a purity of ≥99.99% nitrogen as an inert gas, an oxygen content of 0.5ppm, and a moisture content of 1.5ppm at 40°C Stir in the mixed solution of ether and 1,3-dioxolane for 2 hours; then add 1.8mol anhydrous lithium hydroxide and stir for 8 hours, centrifuge and filter to obtain the electrolytic solution for lithium-iron disulfide battery liquid;

[0028] 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.

[0029] The prepared electrolyte was tested, its water content was 17.4ppm, and its conductivity at 25±2°C was 2.37ms / cm.

Embodiment 2

[0031] A preparation method for an electrolyte of a lithium-iron disulfide battery, comprising the steps of:

[0032] Add 1 mol of anhydrous aluminum triiodide to 1 L of ethylene glycol dimethyl ether at 40°C in a glove box with argon gas with a purity of ≥99.99% as an inert gas, an oxygen content of 0.5 ppm, and a moisture content of 10 ppm. Stir in the mixed solution with 1,3-dioxolane for 2 hours; then add 3.6mol anhydrous lithium hydroxide and stir for 8 hours, centrifuge and filter to obtain the electrolyte for lithium-iron disulfide battery ;

[0033] 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.

[0034] The prepared electrolyte was tested, and its water content was 22.2 ppm, and its conductivity at 25±2° C. was 7.5 ms / cm.

Embodiment 3

[0036] A preparation method for an electrolyte of a lithium-iron disulfide battery, comprising the steps of:

[0037] Add 1 mol of anhydrous aluminum triiodide to 1 L of ethylene glycol dimethyl ether in a glove box with a purity ≥ 99.99% of nitrogen as an inert gas, an oxygen content of 0.5 ppm, and a moisture content of 1.5 ppm at 40°C Stir in the mixed solution with 1,3-dioxolane for 2 hours; then add 3.6mol anhydrous lithium hydroxide and stir for 8 hours, centrifuge and filter to obtain the electrolyte for lithium-iron disulfide battery ;

[0038] 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.

[0039] The prepared electrolyte was tested, its water content was 23.8ppm, and its conductivity at 25±2°C was 7.8ms / cm.

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Abstract

The invention belongs to the technical field of lithium primary batteries and discloses a preparation method for electrolyte used for a lithium-ferrous disulfide battery. The preparation method for the electrolyte used for the lithium-ferrous disulfide battery comprises the following steps of adding anhydrous aluminum triiodide into an organic solvent in an inert atmosphere at a temperature of 40-70 DEG C for stirring for 0.5-2 hours, then adding anhydrous lithium hydroxide for stirring and reacting for 6-8 hours, and centrifuging and filtering to obtain the electrolyte used for the lithium-ferrous disulfide battery. The preparation method adopts a one-step method for synthesis of the electrolyte used for the lithium-ferrous disulfide battery; water content is not introduced in the whole preparation process, the cost is relatively low, and the lithium-ferrous disulfide battery prepared from the electrolyte obtained by the preparation method is good in performance.

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 preparation method for one-step synthesis of the electrolyte solution for a lithium-ferrous disulfide battery. 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 (Z...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/14H01M6/16
CPCH01M6/14H01M6/16
Inventor 祝媛程琛王彦斌刘建华刘金成
Owner EVE ENERGY CO LTD
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