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A short-channel mesoporous positive electrode material for a lithium-ion battery and a preparation method thereof

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of nano-material preparation process and high production cost, and alleviate the problems of poor low-temperature discharge performance, electrical conductivity and lithium ion diffusion rate Improved effect

Active Publication Date: 2022-04-12
余姚市海泰贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with market demand, lithium iron phosphate materials and their battery performance still need continuous improvement and improvement, such as ion doping to improve the conductivity of the material and the diffusion rate of lithium ions. There are still differences; the preparation process and production of nanomaterials The cost requirement is relatively high; in addition, in addition to considering the feasibility study under laboratory conditions, the production requirements of large-scale industrialization must also be considered, which need further research

Method used

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  • A short-channel mesoporous positive electrode material for a lithium-ion battery and a preparation method thereof
  • A short-channel mesoporous positive electrode material for a lithium-ion battery and a preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038]Add 4.4g of cetyltrimethylammonium bromide (CTAB), 147g of deionized water, and 10.3g of phosphoric acid into the reaction kettle, stir for 4 hours at 45°C, and then slowly add 2.14g of Zirconium oxychloride, 14.3g ferric chloride and 6.5g lithium acetate, after continuing to stir for 24h, transfer the reaction mixture into a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, crystallize at 100°C for 24h, use Filter and wash with ionic water to obtain a precipitate, dry the precipitate, then raise the temperature to 600°C at a rate of 4°C / min under the protection of Ar atmosphere, and continue to bake for 6h to obtain the short-channel mesoporous positive electrode Material; the pore length of the short-channel mesoporous cathode material detected by scanning electron microscopy is 300nm, the thickness of the carbon coating is 3nm, and the conductivity measured by the probe method is 1.10×10 -2 S / cm.

[0039] The method of making the experimental battery...

Embodiment 2

[0042] Add 4.4g of cetyltrimethylammonium bromide (CTAB), 147g of deionized water, and 10.3g of phosphoric acid into the reaction kettle, stir for 4 hours at 45°C, and then slowly add 1.78g of Zirconium oxychloride, 14.6g ferric chloride and 6.5g lithium acetate, after continuing to stir for 24h, transfer the reaction mixture into a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, crystallize at 100°C for 24h, use Filter and wash with ionic water to obtain a precipitate, dry the precipitate, and then raise the temperature to 600°C at a rate of 4°C / min under the protection of Ar atmosphere, and continue to bake for 6h to obtain the short-channel mesoporous positive electrode Material; the pore length of the short-channel mesoporous cathode material detected by scanning electron microscopy is 500nm, the thickness of the carbon coating is 2nm, and the conductivity measured by the probe method is 1.07×10 -3 S / cm.

[0043] An experimental battery was prepared acc...

Embodiment 3

[0046] Add 4.4g of octadecyldimethylbenzyl quaternary ammonium chloride, 147g of deionized water, and 10.3g of phosphoric acid into the reaction kettle, stir at 45°C for 4h, and then slowly add 2.67g of Zirconium oxychloride, 13.8g ferric chloride and 6.5g lithium acetate, after continuing to stir for 24h, transfer the reaction mixture into a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, crystallize at 100°C for 24h, use Filter and wash with ionized water to obtain a precipitate, dry the precipitate, and then raise the temperature to 680°C at a rate of 4°C / min under the protection of an Ar atmosphere, and continue to bake for 6 hours to obtain the short-channel mesoporous cathode Material; the pore length of the short-channel mesoporous cathode material detected by scanning electron microscopy is 580nm, the thickness of the carbon coating is 4nm, and the conductivity measured by the probe method is 6.01×10 -4 S / cm.

[0047] An experimental battery was pre...

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Abstract

The invention discloses a short-channel mesoporous positive electrode material of a lithium ion battery and a preparation method thereof. The short-channel mesoporous positive electrode material adopts a simple method to combine three technologies of doping, coating and material nanometerization into the Together; the short-channel mesoporous cathode material is formed by double modification of carbon coating and doping Zr, and the channel length is between 200-400nm; its preparation method uses cationic surfactant as carbon source and support, and adds Zr source A novel short-channel mesoporous cathode material was prepared by a one-step hydrothermal method. The short-channel mesoporous cathode material prepared by this method can not only improve the performance of lithium-ion batteries LiFePO 4 The conductivity of the positive electrode material and the diffusion rate of lithium ions can also alleviate the problem of poor low-temperature discharge performance to a certain extent, and broaden its application in new energy vehicles.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a short-channel mesoporous cathode material of a lithium-ion battery and a preparation method thereof. Background technique [0002] With the increasingly serious energy crisis in the world and the shortage of petroleum resources as the main power energy, it is imminent to research and develop a new generation of alternative products. At present, all countries have given strong financial investment and policy support in the field of new energy, including lithium-ion batteries. Lithium-ion batteries have high energy power density, no memory effect, long cycle life, and high working voltage platform. As a high-density energy storage technology, high-efficiency energy conversion technology, and relatively clean and environmentally friendly, it has gradually entered people's field of vision. , has become the focus of people's attention, has been developed t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M10/0525
CPCH01M4/366H01M4/5825H01M4/583H01M10/0525H01M2004/021Y02E60/10
Inventor 李蒙程兴邢伟伟王星星周艳兵王佳希李小兵
Owner 余姚市海泰贸易有限公司
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