A kind of preparation method of polyoxometalate lithium ion battery electrode material

A polyoxometalate and lithium-ion battery technology, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., to achieve the effect of novel structure and low requirements for synthesis equipment

Active Publication Date: 2021-09-07
QUJING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of polyoxometallate lithium ion battery electrode materials, to solve the application problem of polyoxometallate materials in the field of lithium ion battery electrodes, to provide a novel structure for lithium ion battery electrodes , stable electrode material

Method used

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  • A kind of preparation method of polyoxometalate lithium ion battery electrode material
  • A kind of preparation method of polyoxometalate lithium ion battery electrode material
  • A kind of preparation method of polyoxometalate lithium ion battery electrode material

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Embodiment 1

[0035] Na[α-PW 9 o 34 ].nH2 O (300mg), Ni(NO 3 ) 2 .6H 2 O (350mg) and 3-mercapto-1,2,4-triazole (50mg) were added to 4ml of 0.5mol / L sodium acetate solution. Add 0.2ml of ethylenediamine to the above solution, stir at room temperature for 30 minutes, then transfer to a 25ml reaction kettle, and react at 170°C for three days. After the reaction was completed and cooled to room temperature, it was filtered and washed twice with water and ethanol respectively to obtain a green product. The product was vacuum dried at 100° C. for 12 hours to obtain a dark green solid powder. Pass the dried Ni-POM through a 300-mesh sieve. Ni-POM, PVDF, and KS6 were configured into a mixture according to the mass ratio of 60:10:30, NMP was added as a solvent, and after stirring for 2 hours, a lithium-ion battery electrode slurry was prepared. The electrode viscous slurry was coated on a 12 μm copper foil with a coating thickness of 50 μm, and dried at 100° C. for 12 hours to obtain a lithiu...

Embodiment 2

[0037] Example 2: Na[α-PW 9 o 34 ].nH 2 The amount of O added is 1500mg; Ni(NO 3 ) 2 .6H 2 The amount of O added was 1750 mg, the amount of 3-mercapto-1,2,4-triazole added was 250 mg; the amount of ethylenediamine added was 1 ml; the concentration of sodium acetate used for dissolution was 1 mol / l, and the volume was 20 ml. Other operating steps are close to Example 1.

Embodiment 3

[0039] Na[α-PW 9 o 34 ].nH 2 O (600mg), Ni(NO 3 ) 2 .6H 2 O (700mg) and 3-mercapto-1,2,4-triazole (100mg) were added to 8ml of 0.5mol / L sodium acetate solution. Add 0.4ml of ethylenediamine to the above solution, stir at room temperature for 30 minutes, then transfer to a 25ml reaction kettle, and react at 170°C for three days. After the reaction was completed and cooled to room temperature, it was filtered and washed twice with water and ethanol respectively to obtain a green product. The product was vacuum dried at 100° C. for 12 hours to obtain a dark green solid powder. Pass the dried Ni-POM through a 300-mesh sieve. Ni-POM, PVDF, and KS6 were configured into a mixture according to the mass ratio of 70:5:25, and NMP was added as a solvent, and stirred for 2 hours to prepare a lithium-ion battery electrode slurry. The electrode viscous slurry was coated on a 12 μm copper foil with a coating thickness of 50 μm, and dried at 100° C. for 12 hours to obtain a lithium io...

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Abstract

A kind of preparation method of polyoxometalate lithium ion battery electrode material, Na[α-PW 9 o 34 ].nH 2 O,Ni(NO 3 ) 2 .6H 2 O and 3-mercapto-1,2,4-triazole were added to the sodium acetate solution, ethylenediamine was added to the above solution, stirred at room temperature, then transferred to a reaction kettle for three days. After the reaction was completed and cooled to room temperature, it was filtered and washed twice with water and ethanol to obtain a green product, which was vacuum-dried at 100° C. for 12 hours to obtain a dark green solid powder. The polyoxometalate material prepared by this method, under the current density of 0.01V-3V, 50mA / g, the first discharge specific capacity reaches 926mAh / g; after 50 cycles, the discharge capacity is 647mAh / g, and the capacity retention rate is 70 %. The invention has low requirements on synthesis equipment, and the synthesized polyoxometalate material has a novel and stable structure, and is a novel lithium ion battery electrode material.

Description

technical field [0001] The invention relates to a preparation method of a polyoxometalate lithium ion battery electrode material. The polyoxometalate has a simple synthesis method, has good capacity and cycle performance as a lithium ion battery negative electrode material, and is a novel and stable electrode material. Background technique [0002] Traditional fossil energy is facing the problems of resource shortage and environmental pollution, and the development of new energy and new energy technology has attracted worldwide attention. Lithium-ion batteries are the most mature energy storage technology developed in the past ten years. At present, lithium-ion batteries have been widely used in small electronic devices, mobile communications, electric vehicles, energy storage power stations, and peak-valley shaving. With a series of policies promulgated by the state, the energy density of lithium-ion batteries will reach 300Wh / kg in the future, which shows that lithium-ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/1397H01M4/04H01M10/0525
CPCH01M4/0404H01M4/1397H01M4/5825H01M10/0525Y02E60/10
Inventor 夏书标刘建军李付绍成飞翔
Owner QUJING NORMAL UNIV
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