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Ternary metal oxide based on zinc ion doping, and preparation method and application thereof

A ternary metal and oxide technology, applied to electrical components, electrochemical generators, battery electrodes, etc., can solve problems such as waste of raw materials, energy waste, and unstable controllability, so as to avoid waste, reduce influencing factors, The effect of avoiding the formation of impurity phases

Active Publication Date: 2019-02-26
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Description
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  • Application Information

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Problems solved by technology

These methods will lead to the formation of some impurity phases or the instability of controllability and waste of raw materials during experiments and applications.
[0008] The synthesis of ternary metal oxides by high-temperature solid-state method requires high-energy-consuming reaction processes such as high-energy ball milling and high-temperature solid-state sintering, which will cause energy waste to a certain extent.

Method used

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  • Ternary metal oxide based on zinc ion doping, and preparation method and application thereof
  • Ternary metal oxide based on zinc ion doping, and preparation method and application thereof
  • Ternary metal oxide based on zinc ion doping, and preparation method and application thereof

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preparation example Construction

[0041] An aspect of the embodiments of the present invention provides a method for preparing a ternary metal oxide based on zinc ion doping, which includes:

[0042] According to the molar dose ratio (or called tending to the molar dose ratio, the error is caused by the problems in the experimental process of weighing, pipetting, cleaning and centrifugation) uniformly mix the zinc ion solution with the dispersion of a single metal oxide , and stirred at 40°C to 80°C for 6h to 120h to form a mixed solution, followed by a hydrothermal reaction to make zinc ions doped into the nanocrystals of a single metal oxide and sintered to obtain a ternary crystal based on zinc ion doping Metal oxides, wherein the temperature of the hydrothermal reaction is 80°C to 160°C, and the time is 6h to 120h.

[0043] Preferably, the molar mass ratio of the zinc ion solution to the metal ions in the single metal oxide is consistent with the ratio of metal elements in the ternary metal oxide based on ...

Embodiment 1

[0085] Manganese acetate was used as a precursor, ultrasonically stirred for 3 hours, dispersed in deionized water to form a 10 mg / ml manganese acetate aqueous solution, and polyvinylpyrrolidone (PVP) was added as a surfactant.

[0086] Pour the mass ratio of 10% sodium hydroxide aqueous solution evenly into the above aqueous solution to form dark green Mn(OH) 2 Nanosheet precipitate, see Figure 1a shown.

[0087] Weigh the Mn(OH) containing 0.01 mole 2 The nanosheets were ultrasonically stirred for 0.5h and then stirred for 0.5h, so that they were uniformly dispersed in a mixed solvent of ethanol and ethylene glycol (v:v=4:1) at a concentration of 60mg / ml, and then 0.005 moles of zinc nitrate and acetic acid were added The ethanol solution of a mixture of zinc (8:2 in molar ratio) with a concentration of 0.01wt% was magnetically stirred for 120 hours at a temperature of 40°C to infiltrate zinc ions into Mn(OH) 2 the surface of the nanosheets.

[0088] Transfer the above d...

Embodiment 2

[0096] The ferric chloride of 1.625g, the sodium citrate of 0.625g and the sodium acetate of 3.0g are dissolved in the ethylene glycol solvent of 50ml, ultrasonic magnetic force stirs 3h, forms brown-black solution and transfers in the hydrothermal kettle of 100ml, in Treated at 200°C for 12 hours to form ferromagnetic Fe with a diameter of about 150nm 3 o 4 Nanospheres, see Figure 3a shown.

[0097] Weigh 0.001 mole of Fe 3 o 4 Ultrasonic the nanospheres for 10 hours and stir for 120 hours, so that they are uniformly dispersed in the ethanol solvent to form a dispersion with a concentration of 0.05 mg / ml, then add 0.0015 moles of zinc acetate in ethanol to form a concentration of 1 wt%, and keep the temperature at 60 Magnetic stirring for 20 hours under the condition of ℃, used to infiltrate zinc ions into Fe 3 o 4 the surface of the nanospheres.

[0098] Transfer the above dispersion solution into a hydrothermal kettle and keep it at 110°C for 12h to form ZnFe 2 o ...

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Abstract

The invention discloses a ternary metal oxide based on zinc ion doping, and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing a zincion solution with a dispersion liquid of a single metal oxide according to a certain molar dose ratio so as to form a mixed liquid; then performing a hydrothermal reaction to dope zinc ion into the nanocrystals of the single metal oxide so as to obtain a zinc ion-doped ternary metal oxide; and then sintering the obtained ternary metal oxide at high temperature sintering in an air atmosphere or a protective atmosphere to obtain the ternary metal oxide having high crystallinity. The addition of the zinc ion according to the molar dose ratio in the invention can effectively control the molar doseratio of zinc in a material, reduce the influence of excessive zinc on the morphology and crystal structure of the material, is beneficial for accurate regulation and problem analysis of the synthesis process and element ratio of the material, and avoids the formation of miscellaneous phases.

Description

technical field [0001] The present invention relates to the preparation of a ternary metal oxide, in particular to a ternary metal oxide synthesized based on zinc ion doping and its preparation method, as well as its application in lithium-ion battery negative electrode energy materials, belonging to renewable Energy material synthesis technology field. Background technique [0002] The pollution caused by traditional fuels and the emergence of energy crisis have prompted people to actively look for new, alternative green energy. As a renewable energy source, dye-sensitized solar cells have always been the focus of attention. At present, their highest photoelectric conversion efficiency has exceeded 13.1%, which is a very valuable photoelectric energy device. Lithium-ion batteries are widely used in the commercial field as a secondary energy storage device, which has the advantages of high energy density, long cycle life and small memory. Therefore, the research and develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/42H01M10/0525H01M4/1391
CPCH01M4/1391H01M4/362H01M4/42H01M4/483H01M10/0525Y02E60/10
Inventor 廖文明蔺洪振李宛飞肖清波王健李付锦杨晋
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI