Positive electrode material added with Cr element of lithium ion battery and preparation method

A technology for lithium-ion batteries and cathode materials, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low discharge voltage, low tap density, and poor anti-overcharge performance, and achieves simple condition control and easy implementation. effects of industrialization

Inactive Publication Date: 2016-05-25
李梦思
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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; lithium iron phosphate is a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take appropriate amount of chemically pure FeC 2 o 4 ?2H 2 O. Li 2 CO 3 , NH 4 h 2 PO 4 and Cr 2 o 3 As a raw material, according to Li 0.99 FeCr 0.01 PO 4 The atomic ratio ingredients are taken out, and 5g of the prepared raw material mixture is taken out and poured into a ball mill jar, and 2g of sucrose and 100g of steel balls are added, and then poured into the acetone solution, after the ball mill jar is immersed, the lid of the jar is tightly closed, and The planetary ball mill is used for ball milling, and the ball milling speed is set at 200r / min. After ball milling for 5 hours, take out the ball mill jar, take out the alloy powder, put it in a flat container to dry, then put the dried powder into a quartz glass tube, and Carry out vacuum sealing, put the sealed glass tube into water, if there is no air bubble, it means that the sealing is good, then put the glass tube into a high-temperature furnace at 500°C for calcination, after calcination for 15 ...

Embodiment 2

[0024] Take appropriate amount of chemically pure FeC 2 o 4 ?2H 2 O. Li 2 CO 3 , NH 4 h 2 PO 4 and Cr 2 o 3 As a raw material, according to Li 0.95 FeCr 0.05 PO 4 The atomic proportion of ingredients, 10g of the prepared raw material mixture is poured into a ball mill jar, and 4g of sucrose and 200g of steel balls are added, then poured into the acetone solution, after the ball mill jar is immersed, the lid of the jar is tightly closed, and the The planetary ball mill is used for ball milling, and the ball milling speed is set at 300r / min. After ball milling for 2 hours, take out the ball mill jar, take out the alloy powder, put it in a flat container to dry, then put the dried powder into a quartz glass tube, and Carry out vacuum sealing, put the sealed glass tube into water, if there is no air bubble, it means that the sealing is good, then put the glass tube into a high-temperature furnace at 800°C for calcination, after calcination for 10 hours, take it out and ...

Embodiment 3

[0026] Take appropriate amount of chemically pure FeC 2 o 4 ?2H 2 O. Li 2 CO 3 , NH 4 h 2 PO 4 and Cr 2 o 3 As a raw material, according to Li 0.9 FeCr 0.1 PO 4 20g of the prepared raw material mixture is poured into a ball mill jar, and 5g of sucrose and 400g of steel balls are added, then poured into the acetone solution, after the ball mill jar is immersed, the lid of the jar is tightly closed, and the The planetary ball mill is used for ball milling, and the ball milling speed is set at 300r / min. After ball milling for 5 hours, take out the ball mill jar, take out the alloy powder, put it in a flat container to dry, then put the dried powder into a quartz glass tube, and Carry out vacuum sealing, put the sealed glass tube into water, if there is no air bubble, it means that the sealing is good, then put the glass tube into a high-temperature furnace at 800°C for calcination, after calcination for 15 hours, take it out and cool it to get a Cr element cathode mat...

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PUM

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Abstract

The invention discloses a positive electrode material added with a Cr element of a lithium ion battery and a preparation method. The positive electrode material added with the Cr element of the lithium ion battery can be obtained according to the following steps of mixing FeC<2>O<4>.2H<2>O, Li2CO3, NH4H2PO4 and Cr2O according to an atom ratio of Li<1-x>FeCr<x>PO4 (0.01<=x<=0.1), placing the mixture in a ball milling tank, adding an appropriate amount of sucrose and steel balls, carrying out ball milling under the protection of acetone, carrying out vacuum sealing on powder after ball milling, placing the powder in a high temperature environment for calcination and carrying out calcination reaction.

Description

technical field [0001] The invention relates to a lithium ion battery positive electrode material and a preparation process thereof, in particular to a positive electrode material added with Cr element, which belongs to the field of batteries. Background technique [0002] As the global energy issue becomes increasingly tense, the search for clean, environmentally friendly, and non-polluting renewable materials has become the focus of chemical power sources. Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. The earliest lithium battery came from the great inventor Edison, using the following reaction: Li+MnO 2 =LiMnO 2， This reaction is a redox reaction. Lithium-ion batteries are widely used in portable appliances and new vehicles due to their advantages such as high specific energy, high working voltage, long cycle life, no memory effect, and no pollution. [0003...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/0525
CPCH01M4/362H01M4/5825H01M10/0525Y02E60/10
Inventor 李梦思
Owner 李梦思
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