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A full-dimensional nano-limnpo 4 Granule preparation method

A particle and nanotechnology, applied in the field of preparation of full-dimensional nano-LiMnPO4 particles, can solve problems affecting lithium ion diffusion and electronic conductivity, and achieve the effects of shortened transmission distance, low cost, and mild reaction conditions

Inactive Publication Date: 2017-10-24
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, micronano LiMnPO 4 Most of the particles are synthesized by high-temperature and high-pressure solvent method, and the synthesis is not full-dimensional nanoparticles. Some even if the primary particles are nano-sized, they aggregate into various micron-sized particle shapes, which affects the lithium ion. Diffusion and Electronic Conductivity

Method used

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  • A full-dimensional nano-limnpo <sub>4</sub> Granule preparation method
  • A full-dimensional nano-limnpo <sub>4</sub> Granule preparation method
  • A full-dimensional nano-limnpo <sub>4</sub> Granule preparation method

Examples

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Effect test

Embodiment 1

[0025] Dissolve 6g of glucose in 60mL of ethylene glycol and 2 Insulate at 140°C for 2 hours under protection, so that the color of the ethylene glycol solution changes from colorless to light yellow, which indicates that ethylene glycol glucoside surfactants are generated in the ethylene glycol solution, and a light yellow solution A is finally obtained. Take 0.06mol lithium hydroxide (LiOH·H 2 O) Dissolve in 15mL deionized water, mix it with solution A and stir evenly to obtain solution B. Take 0.02mol manganese sulfate (MnSO 4 ) and 0.02 mol phosphoric acid (H 3 PO 4 ) was dissolved in 15mL deionized water to obtain solution C, and solution C was added to solution B to form a reaction solution. 2 Under protection, the reaction solution was heated to reflux for 12 hours, and the reflux reaction temperature was 139°C. The reaction precipitate was centrifuged at 8000 r / min, washed with deionized water and dried under vacuum at 80°C for 12 hours to obtain the target produc...

Embodiment 2

[0027]Dissolve 8g of glucose in 40mL of ethylene glycol and 2 Insulate at 130° C. for 5 hours under protection, so that the color of the ethylene glycol solution changes from colorless to light yellow, which indicates that ethylene glycol glucoside surfactants are generated in the ethylene glycol solution, and a light yellow solution A is finally obtained. Take 0.06mol lithium hydroxide (LiOH·H 2 O) Dissolve in 30mL deionized water, mix it with solution A and stir evenly to obtain solution B. Take 0.02mol manganese chloride (MnCl 2 ) and 0.02mol phosphoric acid (H 3 PO 4 ) was dissolved in 30mL deionized water to obtain solution C, and solution C was added to solution B to form a reaction solution. 2 Under protection, the reaction solution was heated to reflux for 24 hours, and the reflux reaction temperature was 130°C. The reaction precipitate was centrifuged at 8000r / min, washed with deionized water and dried under vacuum at 80°C for 12h to obtain the target product. X...

Embodiment 3

[0029] Dissolve 0.7g of glucose in 70mL of ethylene glycol and 2 Insulate at 150°C for 1 hour under protection, so that the color of the ethylene glycol solution changes from colorless to light yellow, which indicates that ethylene glycol glucoside surfactants are generated in the ethylene glycol solution, and a light yellow solution A is finally obtained. Take 0.03mol lithium hydroxide (LiOH·H 2 O) Dissolve in 10mL deionized water, mix it with solution A and stir evenly to obtain solution B. Get 0.01mol manganese nitrate (Mn(NO 3 ) 2 ) and 0.01mol phosphoric acid (H 3 PO 4 ) was dissolved in 10mL deionized water to obtain solution C, and solution C was added to solution B to form a reaction solution. 2 Under protection, the reaction solution was heated to reflux for 6 hours, and the reflux reaction temperature was 150°C. The reaction precipitate was centrifuged at 8000r / min, washed with deionized water and dried under vacuum at 80°C for 12h to obtain the target product....

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Abstract

The invention discloses a preparation method for full-dimensional LiMnPO4 nanoparticles. The preparation method comprises the specific steps of taking ethylene glycol and deionized water as a reaction medium; adding glucose into ethylene glycol, and performing thermal insulation at a temperature of 130-150 DEG C for 1-5h for on-line generating an ethylene glycol glucoside surfactant to be used as a crystalline grain formation inhibitor; taking lithium hydroxide, soluble manganese salt and phosphoric acid as the raw materials; taking deionized water as solvent; and enabling the volume ratio of ethylene glycol to water to be 3.5:1-1:1.5 through regulation and control, and enabling the boiling point of the reaction solution to be 130-150 DEG C and performing backflow reaction for 6-24h to obtain the LiMnPO4 particles, wherein the sizes of the LiMnPO4 particles are not larger than 160nm in any dimension. According to the preparation method, the pure-phase LiMnPO4 particles can be directly manufactured in a normal pressure liquid phase environment in one step, and the sizes of the LiMnPO4 particles are not larger than 160nm in any dimension; and in addition, the prepared LiMnPO4 particles are quite high in dispersity.

Description

technical field [0001] The invention belongs to the technical field of synthesis of lithium-ion battery cathode materials, in particular to a full-dimensional nano LiMnPO 4 Method of preparation of particles. Background technique [0002] Lithium-ion battery, as a high-performance rechargeable green power source, has been widely used in various portable electronic products and communication tools in recent years, and has been gradually developed as a power source for electric vehicles, thereby promoting its development to safety, environmental protection, Development in the direction of low cost and high specific energy. [0003] LiMnPO 4 with and LiFePO 4 The same olivine structure, the same theoretical specific capacity, but its working voltage is 4.1V (relative to Li / Li + Electrode potential), which is just in the electrochemical window of the existing lithium-ion battery electrolyte system. Therefore, due to the higher operating voltage, LiMnPO 4 The theoretical sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525B82Y30/00B82Y40/00C01B25/45
CPCB82Y30/00B82Y40/00C01B25/45H01M4/5825H01M10/0525Y02E60/10
Inventor 常焜谢峥峥汤宏伟李苞上官恩波常照荣
Owner HENAN NORMAL UNIV
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