Composite lithium ion electrode material

A technology of ion electrodes and electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low conductivity and limit the movement space of lithium ions, and achieve the effect of simple condition control and easy industrialization.

Inactive Publication Date: 2018-03-23
郑春燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the a-c plane where lithium atoms are located, PO 4 Tetrahedral, which restricts the space for lithium ions to move, so its conductivity is lower than other layered compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Ce powder as raw materials, according to Li 0.97 Ce 0.03 Fe 0.85 mn 0.15 PO 4 The atomic proportion of ingredients is 5g of the mixture. After preliminary mixing of the prepared mixture raw materials, pour them into the ball mill jar together, then add an appropriate amount of grinding steel balls into the ball mill jar, then cover the ball mill jar lid and tighten the screws, and then use the pump The air machine is used for vacuuming operation, and the operation is stopped after the air pressure in the tank is lower than 0.1 atmosphere, and then an appropriate amount of argon is filled into the ball milling tank as a protective gas, and then it is put into a planetary ball mill for ball milling. The speed is set to 200 rev / min. After ball milling for 12 hours, take off the ball mill pot and let it stand for a period of time. After the gas in the ball mill pot is releas...

Embodiment 2

[0023] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Ce powder as raw materials, according to Li 0.99 Ce 0.01 Fe 0.9 mn 0.1 PO 4 20g of the mixture with the atomic ratio of ingredients, mix the prepared mixture raw materials and pour them into the ball mill jar together, then add an appropriate amount of grinding steel balls into the ball mill jar, then cover the ball mill jar lid and tighten the screws, and then use the pump The air machine is used for vacuuming operation, and the operation is stopped after the air pressure in the tank is lower than 0.1 atmosphere, and then an appropriate amount of argon is filled into the ball milling tank as a protective gas, and then it is put into a planetary ball mill for ball milling. The speed is set to 250 rev / min. After ball milling for 11 hours, take off the ball mill pot and let it stand for a period of time. After the gas in the ball mill pot is released and decompressed, open...

Embodiment 3

[0025] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Ce powder as raw materials, according to Li 0.9 Ce 0.1 Fe 0.7 mn 0.3 PO 4 50g of the mixture with the atomic ratio of ingredients, mix the raw materials of the prepared mixture initially and pour them into the ball mill jar together, then add an appropriate amount of grinding steel balls into the ball mill jar, then cover the ball mill jar lid and tighten the screws, and then use the pump The air machine is used for vacuuming operation, and the operation is stopped after the air pressure in the tank is lower than 0.1 atmosphere, and then an appropriate amount of argon is filled into the ball milling tank as a protective gas, and then it is put into a planetary ball mill for ball milling. Set the speed at 300 rpm. After 10 hours of ball milling, remove the ball mill tank and let it stand for a period of time. After the gas in the ball mill tank is released and the pressur...

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PUM

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Abstract

The invention discloses a composite lithium ion electrode material. A preparation method of the electrode material comprises the steps: taking FeC2O4.2H2O, Li2CO3, NH4H2PO4, a Mn powder and a Ce powder as raw materials, preparing the raw materials according to the atomic ratio of Li1-xCexFe1-yMnyPO4 and mixing, then carrying out ball milling, keeping the temperature of the mixture after ball milling constant for 5 hours or more in the environment with the temperature of 300 DEG C, keeping the temperature constant for 10 hours or more in the environment with the temperature of 600 DEG C, allowing the mixture to undergo a reaction and sintering at high temperature, naturally cooling, collecting a powder, and thus obtaining the product.

Description

technical field [0001] The invention relates to a lithium ion electrode material and a preparation process thereof, in particular to a positive electrode material added with rare earth and manganese elements and a preparation method thereof, belonging to the field of battery electrode materials. Background technique [0002] At present, the common cathode materials for lithium-ion batteries mainly include lithium cobalt oxide with layered structure and lithium iron phosphate with olivine structure. where LiCoO 2 The structure is relatively stable, the electrochemical performance is excellent, and it is a relatively mature cathode material that has been commercialized at present, but the anti-overcharge performance of this material is poor, and the specific capacity drops rapidly at a higher charging voltage; LiFePO 4 It is a relatively new cathode material, which has high safety and low cost, and is an excellent cathode material. However, the conductivity at room temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/0525
CPCH01M4/364H01M4/5825H01M10/0525Y02E60/10
Inventor 郑春燕
Owner 郑春燕
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