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A lithium-rich manganese-based composite material and its preparation method and application

A lithium-rich manganese-based, composite material technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of limited application and development, achieve the best cycle performance, simple and convenient process, and the effect of precise ratio

Active Publication Date: 2020-11-06
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the NCM ternary materials that are widely used in the market have good specific capacity and cycle performance, the specific capacity lower than 200mAh / g limits its further application and development. In order to meet the higher requirements of electronic equipment for battery specific capacity , lithium-rich manganese-based materials have become potential materials for scientific research and production

Method used

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  • A lithium-rich manganese-based composite material and its preparation method and application
  • A lithium-rich manganese-based composite material and its preparation method and application
  • A lithium-rich manganese-based composite material and its preparation method and application

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Embodiment 1

[0048] This embodiment provides a lithium-rich manganese-based composite material, which is prepared by the following steps:

[0049] Take 1.00g of Li 1.2 mn 0.54 co 0.13 Ni 0.13 o 2 Place in a 500mL round bottom flask and add 100mL of deionized water;

[0050] Weigh 0.02g of sodium citrate and 0.026g of ammonium hydrogen phosphate into a round-bottomed flask, put in a rotating magnet, place the round-bottomed flask on a heating mantle and a magnetic stirrer, set the temperature at 60°C, turn on the stirring switch; Tube will N 2 Into the three-neck round bottom flask, leave an outlet as N 2 outlet of

[0051] Weigh 0.025g of ferrous chloride and dissolve it in 60mL of deionized water, put it into a 100mL needle tube after being completely dissolved, and inject 60mL of the solution into the three-neck flask within 45min through the air micropump;

[0052] After the precipitation is completed, keep it for 2h, then turn off the stirring, stop heating and keep feeding N ...

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Abstract

The invention provides a lithium-rich manganese-based composite material as well as a preparation method and the application thereof. The preparation method comprises the following steps: coating thesurface of a lithium-rich manganese-based material with Fe4(PO4)3(OH)3, wherein the mass ratio of the lithium-rich manganese-based material to the Fe4(PO4)3(OH)3 is 95:5-99:1. The invention also provides the lithium-rich manganese-based composite material obtained by the above preparation method. The lithium-rich manganese-based composite material can be used as a positive electrode material of abattery, and has relatively good high-rate performance, relatively high first-cycle coulombic efficiency and good cycle performance.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a lithium-rich manganese-based composite material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] In recent years, the rapid development of new energy vehicle technology, the maturity of the three-electric system, and the improvement of wind power and photovoltaic power generation technology have higher requirements for energy storage batteries, which makes the production and quality requirements of lithium-ion batteries in the next few years. Li will be greatly improved and will be the main new force in the future. Lithium-ion batteries have been widely used in today's digital mobile terminals, new energy power batteries, and energy storage. With the diversification of terminals, the application scenarios and directions of lithium-ion batteries have become more refined. Fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/5825H01M4/628H01M10/0525Y02E60/10
Inventor 孙晖魏墨晗周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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