Method for assembling aqueous lithium-ion battery by aid of lithium iron manganese phosphate

A technology of lithium iron manganese phosphate and lithium ion battery, which is applied in the field of lithium iron manganese phosphate assembling aqueous solution lithium ion battery, can solve problems such as unreported electrochemical performance of lithium ion battery, achieve easy control, solve potential safety hazards, and simple operation Effect

Inactive Publication Date: 2012-07-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the electrochemical performance of lithium-ion batteries in aqueous solution assembled with lithium manganese iron phosphate materials has hardly been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, 10 ml of ethanol was added to the three-necked flask, nitrogen gas was introduced, and the temperature control range was 35°C, and magnetic stirring was carried out to form solution A; after 20 minutes, ferrous chloride and manganous chloride solid were pressed Add 0.5:0.5 molar ratio to solution A, stir for 3 hours to form solution B; add 10 ml of 1 mol / liter phosphorus pentoxide ethanol solution to solution B, stir for 3 hours to form solution C; in solution C Add 10 milliliters of lithium acetate ethanol solution and stir for 2 hours to form solution D; add 10 milliliters of 1 mol / liter citric acid ethanol solution to solution D and stir for 12 hours to form solution E; then the temperature of solution E is raised to 70-80°C, evaporate the ethanol in it to form a xerogel; put the xerogel in a porcelain boat, put it in a Fe-Cr-Al wire resistance wire furnace, and heat it at 1-5°C min -1 The heating rate is heated to 450-650°C and kept for 3-6 hours; then cooled...

Embodiment 2

[0032] First, 10 ml of ethanol was added to the three-necked flask, nitrogen gas was introduced, and the temperature control range was 35°C, and magnetic stirring was carried out to form solution A; after 20 minutes, ferrous chloride and manganous chloride solid were pressed Add 0.4:0.6 molar ratio to solution A, stir for 3 hours to form solution B; add 10 ml of 1 mol / liter phosphorus pentoxide ethanol solution to solution B, stir for 3 hours to form solution C; Add 10 milliliters of lithium acetate ethanol solution and stir for 2 hours to form solution D; add 10 milliliters of 1 mol / liter citric acid ethanol solution to solution D and stir for 12 hours to form solution E; then the temperature of solution E is raised to 70-80°C, evaporate the ethanol in it to form a xerogel; put the xerogel in a porcelain boat, put it in a Fe-Cr-Al wire resistance wire furnace, and heat it at 1-5°C min -1 The heating rate is heated to 450-650°C and kept for 3-6 hours; then cooled to room tempe...

Embodiment 3

[0037] First, 10 ml of ethanol was added to the three-necked flask, nitrogen gas was introduced, and the temperature control range was 35°C, and magnetic stirring was carried out to form solution A; after 20 minutes, ferrous chloride and manganous chloride solid were pressed Add 0.3:0.7 molar ratio to solution A, stir for 3 hours to form solution B; add 10 ml of 1 mol / liter phosphorus pentoxide ethanol solution to solution B, stir for 3 hours to form solution C; in solution C Add 10 milliliters of lithium acetate ethanol solution and stir for 2 hours to form solution D; add 10 milliliters of 1 mol / liter citric acid ethanol solution to solution D and stir for 12 hours to form solution E; then the temperature of solution E is raised to 70-80°C, evaporate the ethanol in it to form a xerogel; put the xerogel in a porcelain boat, put it in a Fe-Cr-Al wire resistance wire furnace, and heat it at 1-5°C min -1 The heating rate is heated to 450-650°C and kept for 3-6 hours; then cooled...

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Abstract

The invention discloses a method for assembling an aqueous lithium-ion battery by the aid of lithium iron manganese phosphate. The method includes using a lithium iron manganese phosphate electrode material as an anode active material; replacing organic electrolyte in a traditional lithium ion battery with deoxidized saturated aqueous lithium nitrate liquor to design a novel lithium ion battery; and preparing a lithium iron manganese phosphate anode material by the aid of a sol-gel method and a solid-phase sintering method, and preparing a lithium vanadate material by the aid of a solid-phase sectioning method. Compared with the traditional lithium ion battery, the aqueous lithium-ion battery has the advantages that potential safety hazards are completely eliminated, the battery can be assembled without a harsh vacuum environment, strict control of dryness and humidity and protecting atmosphere, electrolyte of the aqueous lithium-ion battery is cheap, and ion conductivity of the electrolyte is higher than the organic electrolyte by two orders of magnitude. In addition, the discharge capacity of the aqueous lithium-ion battery under the condition with high rate is higher than the discharge capacity under the condition with low rate, and the method is applicable to power batteries in the high-power field and under conditions of quick charging and discharging, and has a practical value.

Description

technical field [0001] The invention belongs to material preparation and its application in a lithium-ion battery system for power, in particular to a high-power, high-safety assembly method for an aqueous solution lithium-ion battery system for power. Background technique [0002] As a new type of lithium-ion secondary battery for power, the inorganic aqueous solution is used to replace the organic electrolyte of the traditional lithium-ion battery. First, it fundamentally eliminates potential safety hazards such as combustion and explosion caused by the reaction between the organic electrolyte and the electrode material. The second is that the conductivity of the aqueous electrolyte is two orders of magnitude higher than that of the organic electrolyte, which has great competitive potential in the field of power energy. [0003] There have been many reports in the literature on the preparation of lithium manganese iron phosphate materials for traditional lithium-ion batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/58H01M4/485
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 赵铭姝宋晓平黄官亮汪飞
Owner XI AN JIAOTONG UNIV
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