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Lithium-rich manganese-based composite material as well as preparation method and application thereof

A technology of lithium-rich manganese-based, composite materials

Active Publication Date: 2019-04-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • 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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  • Lithium-rich manganese-based composite material as well as preparation method and application thereof
  • Lithium-rich manganese-based composite material as well as preparation method and application thereof
  • Lithium-rich manganese-based composite material as well as preparation method and application thereof

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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 Applications(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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