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A kind of conductive polymer coated doped lithium ion battery positive electrode material and its synthesis method

A conductive polymer and lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as erosion, poor rate performance, poor interface stability, etc., to inhibit erosion, improve rate performance and cycle stability Effect

Active Publication Date: 2019-11-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(1) The ionic conductivity of the material is relatively low, and the ion diffusion coefficient is low, resulting in poor rate performance
(2) The thermal stability of the material is poor
(3) The interface stability of the material is poor, and it is easily eroded by the electrolyte
(4) The material has poor stability under high voltage

Method used

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  • A kind of conductive polymer coated doped lithium ion battery positive electrode material and its synthesis method
  • A kind of conductive polymer coated doped lithium ion battery positive electrode material and its synthesis method
  • A kind of conductive polymer coated doped lithium ion battery positive electrode material and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh Ni separately 0.5 co 0.2 mn 0.3 (OH) 2 9.2524g, LiOH·H 2 O is 3.3874g, Li 2 CO 3 0.9282g and 0.587g NaCl, put it into a ball mill jar filled with 17mL of absolute ethanol, then add zirconium balls, the ratio of material to ball is 1:6, ball mill at 400rpm for 4h, and place in a blast drying oven at 60°C Dry for 4 hours, weigh 6g and put it into a resistance box for pre-calcination at 480°C for 3h, then calcined at 880°C for 12h, and the heating rate is 5°C / min to obtain the sample. Weigh 3g of the sample doped with NaCl, dissolve it in a beaker with distilled water, place it on a magnetic stirrer, stir for 30min, then add 1.74g of surfactant sodium propanesulfonate to the beaker, stir for 10min, and then Add 1.88 g of oxidant sodium thiosulfate, stir for 10 minutes, wash, filter with suction, and dry in a blast drying oven at 60°C for 12 hours. Put the dried sample on filter paper in a petri dish, and put In a small aluminum foil box containing 0.06 g of po...

Embodiment 2

[0033] Weigh Ni separately 0.5 co 0.2 mn 0.3 (OH) 2 9.2524g, LiOH·H 2 O is 3.3874g, Li 2 CO 3 0.9282g and 1.762g NaCl, put it into a ball mill jar filled with 17mL of absolute ethanol, then add zirconium balls, the ratio of material to ball is 1:6, ball mill at 400rpm for 4h, and place in a blast drying oven at 60°C Dry for 4 hours, weigh 6g and put it into a resistance box for pre-calcination at 480°C for 3h, then calcined at 880°C for 12h, with a heating rate of 5°C / min to obtain a doped sample. Weigh the NaCl-doped sample 3g again, dissolve it in a beaker equipped with distilled water, place it on a magnetic stirrer, stir for 30min, then add surfactant sodium propanesulfonate 1.74g in the beaker, after stirring for 10min, then Then add 1.88g of sodium thiosulfate as an oxidant, stir for 10 minutes, wash, filter with suction, and dry in a blast drying oven at 60°C for 12 hours. Put it in a small aluminum foil box containing 0.06g of polypyrrole, the amount of conducti...

Embodiment 3

[0035] Weigh Ni separately 0.5 co 0.2 mn 0.3 (OH) 2 9.2524g, LiOH·H 2 O is 3.3874g, Li 2 CO 3 0.9282g and 2.937g NaCl, put it into a ball mill jar filled with 17mL of absolute ethanol, then add zirconium balls, the ratio of material to ball is 1:6, ball mill at 400rpm for 4h, and place in a blast drying oven at 60°C Dry for 4 hours, weigh 6g and put it into a resistance box for pre-calcination at 480°C for 3h, then calcined at 880°C for 12h, with a heating rate of 5°C / min to obtain a doped sample. Weigh the NaCl-doped sample 3g again, dissolve it in a beaker equipped with distilled water, place it on a magnetic stirrer, stir for 30min, then add surfactant sodium propanesulfonate 1.74g in the beaker, after stirring for 10min, then Then add 1.88g of sodium thiosulfate as an oxidant, stir for 10 minutes, wash, filter with suction, and dry in a blast drying oven at 60°C for 12 hours. Put it in a small aluminum foil box containing 0.06g of polypyrrole, the amount of conducti...

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PUM

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Abstract

The invention discloses a conductive macromolecule coated doped type lithium ion cell anode material and a synthesizing method thereof. A molecular general formula of the lithium ion cell anode material is a.ICP.(1-a)Li1-xM1-yMexM'yO2-zTz, wherein x is larger than or equal to 0 and smaller than or equal to 0.05, y is larger than or equal to 0 and smaller than or equal to 0.05, z is larger than orequal to 0 and smaller than or equal to 0.05, and a is larger than 0 and smaller than or equal to 1; ICP is one or more of polypyrrole, polyphenylene sulfide, polyaniline and polythiophene; M is one or more of Mn, Ni, Co, Al, Cr, Mg, Ca, Zr, Ti, Zn and Fe; Me and M' are metal elements and preferably are one of Na, K, Ba, Zn and Mg; T is a halogen element and preferable is one of F, Cl and Br. Thesynthesizing method comprises the following steps of performing wet milling through an additive containing the Me element and the T element, a lithium source and a transition metal precursor, stoving,then roasting to obtain a doped sample and the coating the doped sample by conductive macromolecules. By means of the obtained doped and coated sample, material conductivity is improved, corrosion ofelectrolyte to the material is inhibited, and rate capacity is obviously improved; the conductive macromolecule coated doped type lithium ion cell anode material is suitable for lithium ion cells.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery cathode materials and preparation thereof, and relates to a conductive polymer modified doped lithium ion battery cathode material and a synthesis method thereof. Background technique [0002] With the continuous consumption of oil resources, the available crude oil resources are getting less and less. In the near future, the exhaustion of oil resources is inevitable. Therefore, in order to reduce the use of petroleum resources as much as possible, many countries and technological fields are doing their best to promote electric vehicles and hybrid vehicles. On the one hand, it can reduce the use of petroleum resources, and on the other hand, it can also reduce the environmental pollution caused by automobile exhaust emissions. Lithium-ion batteries have the characteristics of high specific energy, low environmental pollution, no memory effect, and high safety. They have made considera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/38H01M4/525H01M10/0525
CPCH01M4/366H01M4/38H01M4/525H01M4/60H01M10/0525Y02E60/10
Inventor 陈召勇龚小龙
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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