Preparation process of novel composite electrode material

A preparation process and electrode material technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of limited lithium ion movement space and low conductivity, 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

[0020] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Pr powder as raw materials, according to Li 0.97 PR 0.03 Fe 0.85 mn 0.15 PO 4 The atomic ratio of the ingredients is made into a 5g mixture, and the prepared mixture is initially mixed and poured into the ball mill jar together, then add an appropriate amount of grinding steel balls to the ball mill jar, then cover the ball mill jar lid and tighten the screws, Then use an air pump to carry out vacuuming operation, and stop the operation after the air pressure in the tank is lower than 0.1 atmospheric pressure, then fill the ball milling tank with an appropriate amount of argon as a protective gas, and then put it into a planetary ball mill for ball milling. The speed of the ball mill is set to 300 rpm. After 8 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 decompressed, open the ...

Embodiment 2

[0022] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Pr powder as raw materials, according to Li 0.99 PR 0.01 Fe 0.9 mn 0.1 PO 4 The atomic ratio ingredients are made into a 20g mixture, and the prepared mixture raw materials are initially mixed and poured into the ball mill jar together, then add an appropriate amount of grinding steel balls to the ball mill jar, then cover the ball mill jar lid and tighten the screws, Then use an air pump to carry out vacuuming operation, and stop the operation after the air pressure in the tank is lower than 0.1 atmospheric pressure, then fill the ball milling tank with an appropriate amount of argon as a protective gas, and then put it into a planetary ball mill for ball milling. The speed of the ball mill is set to 350 rpm. After 11 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 pressure i...

Embodiment 3

[0024] Chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 , metal Mn powder and metal Pr powder as raw materials, according to Li 0.9 PR 0.1 Fe 0.8 mn 0.2 PO 4 The atomic ratio of ingredients is made into a 50g 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 to the ball mill jar, then cover the ball mill jar lid and tighten the screws. Then use an air pump to carry out vacuuming operation, and stop the operation after the air pressure in the tank is lower than 0.1 atmospheric pressure, then fill the ball milling tank with an appropriate amount of argon as a protective gas, and then put it into a planetary ball mill for ball milling. The speed of the ball milling speed is set to 400 rpm. After 12 hours of ball milling, remove the ball mill jar and let it stand for a period of time. After the gas in the ball mill jar is released and dec...

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PUM

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Abstract

The invention discloses a preparation process of a novel composite electrode material. The process comprises that the lithium iron phosphate composite electrode material is prepared from FeC2O4.2H2O,Li2CO3, NH4H2PO4, a metal Mn powder and a rare earth Pr powder as raw materials. The process comprises the steps: firstly, proportioning according to the atomic ratio of Li1-xLaxFe1-yMnyPO4, initiallymixing, and putting the mixture into a ball milling tank, and ball-milling under the condition of argon protection; and after ball milling, carrying out segmented high temperature sintering, coolingand collecting a powder, and thus obtaining the product. The preparation process has the advantages of simple preparation process, short technological process, good performance of the prepared electrode material and the like.

Description

technical field [0001] The invention relates to a lithium ion electrode material and a preparation process thereof, in particular to a lithium ion electrode material added with rare earth elements 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. Among them, 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 conductivit...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M4/1391
CPCH01M4/1391H01M4/505H01M4/525Y02E60/10
Inventor 郑春燕
Owner 郑春燕
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