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Preparation method of lithium manganese phosphate nanorod

A lithium manganese phosphate and nanorod technology is applied in the field of positive electrode materials of lithium ion batteries, which can solve the problems of large particle size, which is not conducive to improving the energy density of lithium ion batteries, and achieves good dispersibility, which is conducive to lithium ion diffusion, Easy-to-control effects

Inactive Publication Date: 2016-06-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the microscopic morphology of lithium manganese phosphate prepared in the laboratory is concentrated in diamond-shaped massive and spherical shapes, and the particle size is relatively large. This morphology is not conducive to improving the energy density of lithium-ion batteries.

Method used

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  • Preparation method of lithium manganese phosphate nanorod
  • Preparation method of lithium manganese phosphate nanorod
  • Preparation method of lithium manganese phosphate nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 2.2058g of manganese acetate tetrahydrate and dissolve it in 15mL of ethylene glycol and stir for 0.5h, add 0.6273g of sodium dodecylbenzenesulfonate and stir for 1h to obtain manganese acetate sodium dodecylbenzenesulfonate solution A. Another weighed 0.378g of lithium hydroxide monohydrate was dissolved in 15mL of ethylene glycol and stirred for 0.5h to obtain solution B. Add solution B to solution A and stir for 0.5h to obtain a mixed solution. Finally, add Stir 1.038g of phosphoric acid with a mass concentration of 85% for 1 hour to obtain a precursor solution, then transfer it to a polytetrafluoroethylene reaction kettle, seal it, keep it at 200°C for 10 hours, then cool it down to room temperature, take out the resulting solution, and filter it out. After the supernatant is obtained, add deionized water for ultrasonic oscillation, and then use a centrifuge to centrifuge at a speed of 10,000 rpm for 10 minutes. After filtering off the supernatant, add deionize...

Embodiment 2

[0017] Weigh 2.2058g of manganese acetate tetrahydrate and dissolve it in 15mL of ethylene glycol and stir for 0.5h, add 0.6273g of sodium dodecylbenzenesulfonate and stir for 1h to obtain manganese acetate sodium dodecylbenzenesulfonate solution A. Another weighed 0.378g of lithium hydroxide monohydrate was dissolved in 15mL of ethylene glycol and stirred for 0.5h to obtain solution B. Add solution B to solution A and stir for 0.5h to obtain a mixed solution. Finally, add Stir 1.038g of phosphoric acid with a mass concentration of 85% for 1 hour to obtain a precursor solution, then transfer it to a polytetrafluoroethylene reaction kettle, seal it, keep it at 200°C for 16 hours, then cool it down to room temperature, take out the resulting solution, and filter it out. After the supernatant is obtained, add deionized water for ultrasonic oscillation, and then use a centrifuge to centrifuge at a speed of 10,000 rpm for 10 minutes. After filtering off the supernatant, add deionize...

Embodiment 3

[0019] Weigh 0.7353g of manganese acetate tetrahydrate, dissolve it in 15mL of ethylene glycol and stir for 0.5h, add 0.2091g of sodium dodecylbenzene sulfonate and stir for 1h to obtain the sodium dodecylbenzenesulfonate solution A of manganese acetate. Another weighed 0.126g of lithium hydroxide monohydrate was dissolved in 15mL of ethylene glycol and stirred for 0.5h to obtain solution B. Add solution B dropwise to solution A and stir for 0.5h to obtain a mixed solution. Finally, add Stir 0.346g of phosphoric acid with a mass concentration of 85% for 1 hour to obtain a precursor solution, then transfer it to a polytetrafluoroethylene reaction kettle, seal it, keep it warm at 200°C for 10 hours, then cool it down to room temperature, take out the resulting solution, and filter it out. After the supernatant is obtained, add deionized water for ultrasonic oscillation, and then use a centrifuge to centrifuge at a speed of 10,000 rpm for 10 minutes. After filtering off the supern...

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Abstract

The invention discloses a preparation method of a lithium manganese phosphate nanorod, and belongs to the technical field of cathode materials of lithium-ion batteries. The method comprises the following steps: dissolving manganese sulfate or manganese acetate and sodium dodecylbenzenesulfonate into polyhydric alcohol to prepare a solution A; dissolving lithium hydrate or lithium acetate into the polyhydric alcohol to prepare a solution B; dropwise adding the solution B into the solution A to obtain a precursor solution of lithium salt and manganese salt; and adding phosphoric acid to the precursor solution, stirring, and carrying out solvothermal reaction and after-treatment on the obtained solution to obtain the lithium manganese phosphate nanorod. The method has the advantages of being stable in product quality, high in purity, good in dispersity and beneficial to lithium ion diffusion, so that the high-current charge and discharge properties of the lithium-ion battery are improved; and the preparation process is simple, easy to control, free of pollution, low in cost and beneficial to large-scale production.

Description

technical field [0001] The invention relates to a preparation method of lithium manganese phosphate nanorods, belonging to the technical field of cathode materials for lithium ion batteries. Background technique [0002] Lithium-ion battery is a new type of green secondary power supply system developed after lead-acid, nickel-cadmium, and nickel-metal hydride batteries. It is favored by people because of its outstanding advantages such as high working voltage, high specific energy, large capacity, small self-discharge, good cycle performance, long service life, light weight, small size, pollution-free and pollution-free, and has become a mobile It is the preferred power supply for portable electronic devices such as telephones, digital cameras, and notebook computers. It is expected to achieve large-scale applications in the fields of electric vehicles, aerospace, military mobile communication tools and equipment in the future. In recent years, the ever-expanding developmen...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01B25/45B82Y30/00H01M10/0525
CPCB82Y30/00C01B25/45H01M4/5825H01M10/0525Y02E60/10
Inventor 李家俊王毅赵乃勤师春生何春年刘恩佐
Owner TIANJIN UNIV
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