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Zn-added lithium ion battery cathode material and preparation method thereof

A lithium-ion battery, cathode material technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of low tap density, low discharge voltage, poor anti-overcharge performance, etc., and achieve easy industrialization. , conditional control simple effect

Inactive Publication Date: 2016-05-11
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 relatively new cathode material material, which has high safety and low cost, but has disadvantages such as low discharge voltage (3.4V) and low tap density, which restrict its further application. Therefore, the development of composite cathode materials has become the research of cathode materials for lithium-ion batteries. one of the directions

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 Zn as raw materials, according to Li 0.99 FeZn 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 hours, ta...

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 Zn as raw materials, according to Li 0.95 FeZn 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 cool it t...

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 Zn as raw materials, according to Li 0.9 FeZn 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 Zn-added Lithium-ion battery ca...

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Abstract

The invention discloses a Zn-added lithium ion battery cathode material and a preparation method thereof. The cathode material is prepared by using FeC2O4.2H2O, Li2CO3, NP4H2PO4 and Zn as raw materials. The preparation method includes: mixing the raw materials according to a certain proportion; putting a mixture together with a proper amount of sucrose and steel balls into a ball milling tank for ball milling under dispersing protection of acetone; air-drying powder after ball milling, performing vacuum sealing, placing at high temperature for calcining, and obtaining the Zn-added lithium ion battery cathode material after calcining reaction. The preparation method is simple in condition control and easy in industrialization.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material and a preparation method thereof, in particular to a battery cathode material added with Zn 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] In the compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/0525C01B25/45
CPCC01B25/45H01M4/5825H01M10/0525Y02E60/10
Inventor 李梦思
Owner 李梦思
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