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Sm-element-added lithium ion electrode material

An electrode material, lithium-ion technology, applied in 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: 2018-10-02
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

[0022] First chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 、Cr 2 o 3 and metal Sm powder as raw material, according to Li 0.99 Fe 0.9 Cr 0.1 SM 0.01 PO 4 The atomic ratio of ingredients is 5g of the mixture, the prepared mixture is poured into the acetone solution together, cleaned and filtered, and the raw material mixture collected by filtration is poured into the ball mill together, and 3g of sucrose and 100g of steel balls are added , and then pour acetone solution, after immersing the ball mill tank, cover the tank tightly, put it into a planetary ball mill for ball milling, set the ball milling speed to 250 r / min, after 40 hours of ball milling, take out the alloy powder and put it in a flat container Dry it, then put the dried powder into the quartz glass tube, vacuum seal it under the condition of continuous pumping, put the sealed quartz glass tube into the water to verify the air tightness, if there is no air bubble, it can be considered ...

Embodiment 2

[0024] First chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 、Cr 2 o 3 and metal Sm powder as raw material, according to Li 0.95 Fe 0.9 Cr 0.1 SM 0.05 PO 4 10g of the mixture according to the atomic ratio, pour the mixed raw materials together into the acetone solution, wash and filter, pour the raw material mixture collected by filtration into the ball mill jar together, and add 4g of sucrose and 150g of steel balls , then pour acetone solution, after immersing the ball mill tank, cover the tank tightly, put it into a planetary ball mill for ball milling, set the ball milling speed to 300 r / min, after 30 hours of ball milling, take out the alloy powder and put it in a flat container Dry it, then put the dried powder into the quartz glass tube, vacuum seal it under the condition of continuous pumping, put the sealed quartz glass tube into the water to verify the air tightness, if there is no air bubble, it can be considered sealed If the properties ...

Embodiment 3

[0026] First chemically pure FeC 2 o 4 ・2H 2 O , Li 2 CO 3 , NH 4 h 2 PO 4 、Cr 2 o 3 and metal Sm powder as raw material, according to Li 0.9 Fe 0.9 Cr 0.1 SM 0.1 PO 4 20g of the mixture in the atomic proportion, pour the mixed raw materials together into the acetone solution, wash and filter, pour the raw material mixture collected by filtration into the ball mill jar together, and add 5g of sucrose and 300g of steel balls , then pour acetone solution, after immersing the ball mill tank, cover the tank tightly, put it into a planetary ball mill for ball milling, set the ball milling speed to 350 r / min, after ball milling for 20 hours, take out the alloy powder and put it in a flat container Dry it, then put the dried powder into the quartz glass tube, vacuum seal it under the condition of continuous pumping, put the sealed quartz glass tube into the water to verify the air tightness, if there is no air bubble, it can be considered sealed If the properties are go...

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PUM

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Abstract

The invention discloses a Sm-element-added lithium ion electrode material. Firstly, a proper amount of FeC2O4-2H2O powder, Li2CO3 powder, NH4H2PO4 powder, Cr2O3 powder and metal Sm powder are weighedaccording to Li1-xFe0.9Cr0.1SmxPO4, wherein x is larger than or equal to 0.01 and smaller than or equal to 0.1; the materials are cleaned with an acetone solution, and then the mixture is put into a ball milling tank; a proper amount of cane sugar is added into the ball milling tank, then steel balls with a certain ball-to-ball ratio are put into the ball milling tank, and a tank body is immersedby acetone; then the mixture is put into a ball mill to carry out ball milling, alloy micro powder is taken out after ball milling and is aired, then the powder is put into a quartz glass tube, and vacuum sealing is carried out; the mixture is put into a high-temperature furnace to be calcined under the condition that the air tightness is good, and the powder is taken out after being calcined andis collected to obtain 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 Sm element 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 positive electrode material with high safety and low cost, but it has the disadvantages of low room temperature conductivity, low discharge voltage (3.4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCH01M4/5825H01M4/626H01M10/0525Y02E60/10
Inventor 郑春燕
Owner 郑春燕
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