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Preparation method of lithium iron phosphate positive plate for intelligent home battery

A lithium iron phosphate, smart home technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that the ionic conductivity cannot be improved, and the improvement of electronic conductivity is limited, so as to achieve good capacity and high current charge and discharge performance, Good safety and uniform particle size distribution

Inactive Publication Date: 2018-05-25
BEIJING UNISROBO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can only improve the electronic conductivity, not the ionic conductivity, and the improvement of the electronic conductivity is also limited.

Method used

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  • Preparation method of lithium iron phosphate positive plate for intelligent home battery

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Comparison scheme
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Embodiment approach 1

[0040] Embodiment 1: A method for preparing a lithium iron phosphate cathode sheet for a smart home battery, such as figure 1 shown, including the following steps:

[0041] (1) Configure Fe(NO with a concentration of 0.5mol / L 3 ) 3 solution, the solvent is glycol ether, then add excess carbon source aqueous solution to the solution, stir evenly to form a sol, and stir and evaporate to a gel state at 100°C, and then vacuum dry the gel;

[0042] (2) Mix the dried gel, lithium carbonate, and ammonium dihydrogen phosphate uniformly in molar ratio in step (1), wherein the molar ratio of Li:Fe:P is 1:1:1;

[0043] (3) Heat the mixture at 400°C in a muffle furnace under nitrogen protection at a flow rate of 70 l / min;

[0044] (4) Grind the product obtained in step (3) evenly, heat-treat at 900°C under the same inert atmosphere, and cool naturally to obtain a carbon-coated lithium iron phosphate cathode material; the mass of carbon in the final product is 100% Min content is 7%; ...

Embodiment approach 2

[0050] Embodiment 2: A method for preparing a lithium iron phosphate positive electrode sheet for a smart home battery, such as figure 1 shown, including the following steps:

[0051] (1) Prepare a solution of iron acetate with a concentration of 1.0mol / L, the solvent is glycol ether, and then add an excess of carbon source aqueous solution to the solution, stir evenly to form a sol, and evaporate to a gel at 100°C state, and then vacuum-dried the gel;

[0052] (2) Mix the dried gel, lithium carbonate, and ammonium dihydrogen phosphate uniformly in molar ratio in step (1), wherein the molar ratio of Li:Fe:P is 1:1:1;

[0053](3) In the muffle furnace, under the protection of nitrogen with a flow rate of 60 liters / min, the mixture is heat-treated at 300°C;

[0054] (4) Grind the product obtained in step (3) evenly, heat-treat at 850°C under the same inert atmosphere, and cool naturally to obtain a carbon-coated lithium iron phosphate cathode material; the mass of carbon in th...

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Abstract

The invention relates to a preparation method of a lithium iron phosphate positive plate for an intelligent home battery. The method comprises the following steps: preparing a solution of ferric acetate with a concentration of 1.0mol / L, and stirring and evaporating to reach a gel state; mixing the dried gel, lithium carbonate and ammonium dihydrogen phosphate according to a molar ratio; performingheat treatment on the mixture in a muffle furnace; uniformly grinding the mixture so as to obtain a carbon-coated lithium iron phosphate positive electrode material; dividing the obtained lithium iron phosphate positive electrode material into two parts; mixing the mixtures A and B with water and ethanol, and forming corresponding uniform size A and B; coating the A onto an aluminum foil currentcollector, forming a positive electrode material layer A, coating the size B on the positive electrode material layer A, and forming a positive electrode material layer B; drying in a vacuum drying oven; adopting plasma etching. According to the technical scheme provided by the invention, the battery positive plate has higher capacity performance, excellent capacity and high safety.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a method for preparing a lithium iron phosphate cathode sheet used for smart home batteries. Background technique [0002] Smart home (English: smart home, home automation) is a residential platform, using integrated wiring technology, network communication technology, security technology, automatic control technology, audio and video technology to integrate home life-related facilities to build efficient residential facilities. A management system related to family schedules improves home safety, convenience, comfort, and artistry, and realizes an environmentally friendly and energy-saving living environment. [0003] Many smart homes need to use energy storage batteries to provide power for them. As a new type of energy storage battery, lithium-ion batteries have the advantages of high energy density and no memory effect, and are ideal smart home power supplies. Lithium ir...

Claims

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Application Information

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IPC IPC(8): H01M4/1397H01M4/58
CPCH01M4/1397H01M4/5825Y02E60/10
Inventor 刘雪楠沈刚
Owner BEIJING UNISROBO TECH CO LTD