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Method for preparation of lithium iodide organic electrolytic solution and lithium cell

An organic electrolyte, lithium iodide technology, applied in the field of lithium batteries, can solve the problems of complex anhydrous lithium iodide process, high price, low output, etc., and achieve the effects of simplifying the production process, reducing production costs, and high output

Inactive Publication Date: 2008-07-23
GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the anhydrous lithium iodide obtained by this technology has the disadvantages of complicated process, low yield and high price.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of lithium iodide organic electrolyte:

[0020] Lithium iodide was vacuum-dried at 150°C for 30h, dissolved in a mixed solvent of dioxane and ethylene glycol dimethyl ether with a volume ratio of 1:1 at an ambient dew point below -30°C, and added metal lithium particles, Stir for 72 hours under the environment of 70° C., and obtain lithium iodide organic electrolyte solution after filtration.

[0021] FeS2 is used as the positive electrode active material, and the positive electrode sheet for lithium batteries is formed by general technology. The negative electrode metal Li is used as the negative electrode active material. The negative electrode sheet for lithium batteries is formed by general technology. AA type batteries. Put the cell into the casing, inject 1.8g of lithium iodide organic electrolyte, seal and clean it to form a lithium iron disulfide battery.

[0022] The change in internal resistance of the tested lithium battery stored at a high temp...

Embodiment 2

[0025] Lithium iodide was vacuum-dried at 150°C for 30h, dissolved in dioxane and ethylene glycol dimethyl ether in a mixed solvent with a volume ratio of 1:1 at an ambient dew point below -30°C, added lithium hydride powder and Stir for 48 hours under the environment of 70° C., and obtain lithium iodide organic electrolyte solution after filtration.

[0026] FeS2 is used as the positive electrode active material, and the positive electrode sheet for lithium batteries is formed by general technology. After drying, it is wound with metal lithium tape to form an AA-shaped battery cell to be injected. Put the cell into the casing, inject 1.8g of lithium iodide organic electrolyte, seal and clean it to form a lithium iron disulfide battery. The change in internal resistance of the tested lithium battery stored at a high temperature of 60°C is shown in the table below.

[0027] 0 days

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PUM

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Abstract

The invention relates to a method for preparing a lithium iodide organic solvent electrolyte and a lithium battery, which belongs to the field of batteries. The method for preparing the lithium iodide organic solvent electrolyte is that lithium iodide salt with crystal water is put in a vacuum drying oven and is dried in the temperature of 100-180 DEG C, most of water is removed, the dried lithium iodide salt is dissolved in an organic solvent, a deicer with lithium is added and reacted in the temperature of 20-80 DEG C, the time is 1-200 hours, and the lithium iodide organic solvent electrolyte is obtained through filtering. The organic lithium iodide organic solvent electrolyte of the invention has simple process and high yield, production problems of the lithium iodide organic solvent electrolyte are solved, and the produce cost of the battery is reduced.

Description

technical field [0001] The invention discloses a method for preparing a lithium iodide organic electrolyte and a lithium battery thereof, belonging to the field of batteries, in particular to a lithium iodide organic electrolyte and a lithium battery using the electrolyte with an applied working voltage lower than 2.5V. Background technique [0002] Usually, the lithium iodide electrolyte is prepared by directly dissolving an appropriate content of anhydrous lithium iodide salt in a mixed solvent with a certain molar ratio. In this process, the preparation of anhydrous lithium iodide is a very difficult and very expensive process. During the drying process of lithium iodide, most of the crystal water will be removed at about 150°C, but the rest of the crystal water is not easy to remove even when the temperature is greatly increased. Decomposition occurs. In order to suppress the decomposition of lithium iodide at high temperature and prepare anhydrous lithium iodide, the ...

Claims

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Application Information

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IPC IPC(8): H01M6/16H01M10/40H01M10/0525H01M10/056
CPCY02E60/122Y02E60/10
Inventor 薛建军崔旭轩
Owner GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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