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A rare earth neodymium-doped nickel tungstate nanomaterial and its preparation method

A nanomaterial, neodymium doping technology, applied in the field of material chemistry, can solve the problems of difficult lithium ion deintercalation reaction and low material stability, and achieve the effect of less equipment investment, low raw material cost and excellent performance

Active Publication Date: 2021-09-17
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when transition metal tungstate materials are used as anode materials for lithium-ion batteries, there may be no extra vacancies for the intercalation and extraction of lithium ions, so it is difficult for them to undergo deintercalation reactions of lithium ions, and the stability of the material is not high.

Method used

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  • A rare earth neodymium-doped nickel tungstate nanomaterial and its preparation method
  • A rare earth neodymium-doped nickel tungstate nanomaterial and its preparation method
  • A rare earth neodymium-doped nickel tungstate nanomaterial and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 0.2mmol of ammonium tungstate hydrate [(NH 4 ) 2 WO 4 ]·5H 2 O in a 100mL beaker, add 25mL deionized water, heat and stir to dissolve, then add 6.0mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 (0), stirring and dissolving, obtain solution A, seal with plastic wrap, place at room temperature;

[0021] Weigh 1.2mmol nickel acetate tetrahydrate (C 4 h 6 NiO 4 4H 2 O) and 6.0 mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) join in the beaker, add 10mL deionized water, stir to dissolve, weigh 0.4mmol hydrated neodymium acetate (C 6 h 9 o 6 Nd H 2 O), join in the solution, stir and dissolve, obtain solution B;

[0022] Slowly add solution B to solution A, stir to mix the two solutions evenly, add 4mL of ethylene glycol, stir for 30 minutes, then slowly add concentrated ammonia water dropwise to make the pH of the solution > 12, and obtain a mixture containing precipitation;

[0023] The above-mentioned mixture containing the precipitate was heated ...

Embodiment 2

[0026] Weigh 0.1 mmol of ammonium tungstate hydrate [(NH 4 ) 2 WO 4 ]·5H 2 O in a 100mL beaker, add 15mL deionized water, heat and stir to dissolve, then add 3.0mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 (0), stirring and dissolving, obtain solution A, seal with plastic wrap, place at room temperature;

[0027] Weigh 0.6mmol nickel nitrate hexahydrate and 6.0mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) Add to the beaker, add 10mL deionized water, stir to dissolve, weigh 0.2mmol hydrated neodymium acetate (C 6 h 9 o 6 Nd H 2O), add in the solution, stir and dissolve, obtain solution B;

[0028] Slowly add solution B to solution A, stir to mix the two solutions evenly, add 4mL of ethylene glycol, stir for 30 minutes, then slowly add concentrated ammonia water dropwise until the pH of the solution is > 12, and a mixture containing precipitation is obtained;

[0029] The above-mentioned mixture containing the precipitate was heated in a water bath at 80° C....

Embodiment 3

[0031] Weigh 0.2mmol of ammonium tungstate hydrate [(NH 4 ) 2 WO 4 ]·5H 2 O in a 100mL beaker, add 25mL deionized water, heat and stir to dissolve, then add 6.0mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 (0), stirring and dissolving, obtain solution A, seal with plastic wrap, place at room temperature;

[0032] Weigh 1.2mmol nickel oxalate tetrahydrate (C 4 h 6 NiO 4 4H 2 O) and 6.0 mmol citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) join in the beaker, add 10mL deionized water, stir to dissolve, weigh 0.4mmol hydrated neodymium acetate (C 6 h 9 o 6 Nd H 2 O) into the solution, stirred and dissolved to obtain solution B;

[0033] Slowly add solution B to solution A, stir to mix the two solutions evenly, add 4mL of ethylene glycol, stir for 30 minutes, then slowly add concentrated ammonia water dropwise until the pH of the solution is > 12, and a mixture containing precipitation is obtained;

[0034] The above-mentioned mixture containing the precipitate was...

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Abstract

The invention discloses a rare earth neodymium-doped nickel tungstate nanomaterial and a preparation method thereof. In the invention, a certain amount of hydrated ammonium tungstate, nickel salt, and hydrated neodymium acetate are dissolved in a certain volume of deionized water, and then an appropriate amount of Stir citric acid monohydrate, during the stirring process, slowly add concentrated ammonia water dropwise, so that the pH of the solution is greater than 12; then, add ethylene glycol to the solution as a dispersant, continue stirring; then heat and evaporate water at a certain temperature, Drying; then sintering at high temperature to obtain the product. Electrochemical experiments prove that the rare earth neodymium-doped nickel tungstate nanomaterials prepared by this method have broad application prospects as lithium-ion battery negative electrode materials. In the whole preparation process, the operation is simple, the cost of raw materials is low, the investment in equipment is small, and it is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a rare earth neodymium-doped nickel tungstate material and a preparation method thereof. Background technique [0002] Due to the small particle size and large proportion of surface atoms, nanomaterials have characteristics such as surface effect and size effect, which make them have excellent performance in many aspects, and are widely used in optics, catalysis, magnetism and energy storage materials, etc. field. [0003] Nanoscale transition metal tungstate materials show high capacity, and have the advantages of high specific surface area and short lithium ion migration path, so they are considered to be good candidates for lithium ion battery anode materials (Liu J, Zhang Z, WangZ , et al.Flower-like WO 3 / CoWO 4 / Co nanostructures as high performance anode forlithium ion batteries[J].Journal of Alloys&Compounds,2017,727; Duan Liansheng, Jiang Xueya, Wang Shiq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00B82Y40/00H01M4/48H01M4/52H01M10/0525
CPCB82Y40/00C01G53/006C01P2006/40H01M4/483H01M4/523H01M10/0525Y02E60/10
Inventor 李星舒苗刘飞飞
Owner NINGBO UNIV