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Preparation method and application of two-phase synergistic nickel hydroxide electrode material

An electrode material, nickel hydroxide technology, applied in the field of energy storage, can solve problems such as poor cycle stability, and achieve the effects of high specific capacity, low cost, and good cycle performance

Inactive Publication Date: 2021-02-26
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nickel hydroxide mainly has two crystal phases, α and β. Among them, the theoretical specific capacity of α-Ni(OH)2 is 60% higher than that of β-Ni(OH)2, but it is unstable in an alkaline environment and will actively Transition to β phase with poor cycle stability

Method used

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  • Preparation method and application of two-phase synergistic nickel hydroxide electrode material
  • Preparation method and application of two-phase synergistic nickel hydroxide electrode material
  • Preparation method and application of two-phase synergistic nickel hydroxide electrode material

Examples

Experimental program
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Effect test

Embodiment 1、2

[0025] Examples 1 and 2 prepared Mo-doped nickel hydroxide electrode materials according to the following steps.

[0026] (a) The nickel salt is configured as an aqueous solution of 0.05-0.1mol / L nickel salt; wherein the nickel salt is nickel acetate; the complexing agent is added in an amount of 0-150mg, and the complexing agent is ammonium heptamolybdate.

[0027] (b) After the solid-phase raw materials are completely dissolved, the pH is adjusted to 9 with ammonia water, and the mixed solution is sonicated for 30 min.

[0028] (c) Subsequently, the mixed solution is subjected to hydrothermal treatment at a temperature of 160° C. and a reaction time of 12 hours.

[0029] (d) Finally, a light green precipitate was obtained, which was centrifuged at a centrifugal speed of 4000-8000r / min, the liquid phase was recovered, and the solid phase was washed three times with distilled water and ethanol respectively; dried at 80°C for 12 hours, and then ground to a uniform The nickel h...

Embodiment 1

[0031] (1) configure 0.067mol / L nickel acetate aqueous solution;

[0032] (2) Adjust the pH of the solution to 9 with ammonia water, and sonicate the mixed solution for 30 minutes;

[0033] (3) Put the light green suspension into the reaction kettle, and conduct a hydrothermal reaction at 160°C for 12 hours. After completion, naturally cool to room temperature;

[0034] (4) Obtain light green precipitate, centrifuge, centrifuge speed is 5000-8000r / min, wash 3 times with deionized water and ethanol respectively, dry (drying temperature is 60-100 ℃, drying time 8-16 hours), grind Obtain nickel hydroxide electrode material after being uniform;

[0035] (5) Evenly mix the prepared nickel hydroxide electrode material with acetylene black and PTFE according to the ratio of 80:10:10 to form a paste, and brush evenly to 1cm with a brush 2 On the nickel foam current collector, dry at 60°C for 8h, and then press it into a sheet under a pressure of 10MPa to prepare the Ni(OH)2 electrod...

Embodiment 2

[0037] (1) Configure 0.067mol / L nickel acetate aqueous solution, add 90mg complexing agent (ammonium molybdate tetrahydrate) under continuous stirring, and stir for 30min to dissolve completely;

[0038] (2) Adjust the pH of the solution to 9 with ammonia water, and sonicate the mixed solution for 30 minutes;

[0039] (3) Put the light green suspension into the reaction kettle, and conduct a hydrothermal reaction at 160°C for 12 hours. After completion, naturally cool to room temperature;

[0040] (4) Obtain light green precipitate, centrifuge, centrifuge speed is 5000-8000r / min, wash 3 times with deionized water and ethanol respectively, dry (drying temperature is 60-100 ℃, drying time 8-16 hours), grind Obtain nickel hydroxide electrode material after being uniform;

[0041] (5) Evenly mix the prepared nickel hydroxide electrode material with acetylene black and PTFE according to the ratio of 80:10:10 to form a paste, and brush evenly to 1cm with a brush 2 On the nickel fo...

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Abstract

The invention discloses a preparation method and application of a two-phase synergistic nickel hydroxide electrode material. The method comprises the following steps: using a nickel salt to prepare anaqueous solution of the nickel salt; adding a certain amount of ammonium molybdate tetrahydrate under a stirring condition, adjusting the pH value by using ammonia water after the solid phase is completely dissolved, and carrying out hydrothermal reaction to obtain a green precipitate; and finally, conducting drying and grinding to obtain a flower-like nickel hydroxide electrode material. The high-performance nickel hydroxide electrode material is obtained through a simple hydrothermal method, wherein ammonium molybdate tetrahydrate has important influence on the morphology and phase composition of nickel hydroxide in the hydrothermal process. The preparation method is simple in preparation process, low in cost, environmentally friendly, excellent in product electrochemical performance and good in cycle performance, and the prepared nickel hydroxide nano material can be applied to the fields of super capacitors, batteries and the like.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a preparation method and application of a two-phase synergistic nickel hydroxide electrode material. Background technique [0002] With the rapid development of science and technology, the demand for energy is also increasing. However, due to the limitation and non-renewability of traditional fossil energy, human beings urgently need to seek clean, efficient and sustainable energy, such as solar energy and wind energy. The development of new energy storage devices is of great significance to the utilization and development of renewable energy. Supercapacitors have many advantages such as high power density, fast charge and discharge capability, long cycle life and environmental protection. At present, the anode materials of supercapacitors are mainly carbon materials, and the commercial anode materials are mainly graphite, with single materials and little difference in performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04H01G11/24H01G11/30
CPCC01G53/04C01P2002/72C01P2004/03C01P2006/40H01G11/24H01G11/30Y02E60/13
Inventor 于立新吴远生邬宇恒胡梦竹闵晓杨瑶瑶邹颖璇郭琪煌高震宇
Owner NANCHANG UNIV
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