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Preparation method of polyoxometallate lithium ion battery electrode material

A polyoxometalate, 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: 2018-04-20
QUJING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Preparation method of polyoxometallate lithium ion battery electrode material
  • Preparation method of polyoxometallate lithium ion battery electrode material
  • Preparation method of polyoxometallate lithium ion battery electrode material

Examples

Experimental program
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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

Disclosed is a preparation method of a polyoxometallate lithium ion battery electrode material. Na[<alpha>-PW<9>O<34>].nH<2>O, Ni(NO<3>)<2>.6H<2>O and 3-sulfydryl-1, 2, 4-triazole are added to a sodium acetate solution, and ethylenediamine is added to the solution to be stirred at the normal temperature and then to be transferred to a reaction kettle to be reacted for three days; after the reaction is completed, cooling is preformed to the room temperature, and steps of filtering, and washing by water and ethyl alcohol for two times separately are performed to obtain a green product; and the product is subjected to vacuum drying at a temperature of 100 DEG C for 12h to obtain deep green solid powder. The initial discharge specific capacity of the polyoxometallate material prepared by the method reaches 926mAh / g at 0.01-3V and at the current density of 50mA / g; the discharge capacity is 647mAh / g after 50 cycles, and the capacity retention ratio is 70%; the method is low in synthesis equipment requirement; and the synthesized polyoxometallate material is creative and stable in 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 Applications(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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