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Preparation method and application of nano cubic bimetal selenide material

A nano-cube and bimetallic technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor cycle performance and small specific capacity of batteries, and achieve improved cycle performance and life, Improve the specific capacity of the battery and the effect of simple and controllable process parameters

Inactive Publication Date: 2020-01-03
UZHOU QIANXUN NEW ENERGY TECH CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of nano-cubic double metal selenide material and its application in sodium-ion battery, in order to solve the battery specific capacity existing in the negative electrode material of the current sodium-ion battery proposed in the above-mentioned background technology Smaller, poorer cycle problems

Method used

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  • Preparation method and application of nano cubic bimetal selenide material
  • Preparation method and application of nano cubic bimetal selenide material
  • Preparation method and application of nano cubic bimetal selenide material

Examples

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Embodiment 1

[0032] A preparation method of a nano-cube double metal selenide material, the steps are as follows:

[0033] Weigh 1.5g of potassium stannate and dissolve in 5mL of deionized water, weigh 1.4g of zinc sulfate and dissolve in 45mL of deionized water, mix after fully dissolving, place on a magnetic stirrer and stir at 25°C for 4 hours to obtain a white suspension The turbid liquid is centrifuged, washed with water and washed with alcohol to obtain white cubic ZnSn(OH) 6 ;

[0034] Weigh 1g of the prepared ZnSn(OH) 6 and 2g selenium powder were placed in two arks respectively, under 5% H 2 Calcination treatment in tube furnace under / 95% Ar atmosphere, heating rate 2 ℃ / min, naturally cool to room temperature after 400 ℃ of insulation 3 hours, obtain nano-cube zinc selenide material, and described nano-cube zinc selenide The tin material was characterized by scanning electron microscopy, and the specific scanning electron microscopy picture is as follows figure 1 As shown, it...

Embodiment 2

[0040] A preparation method of a nano-cube double metal selenide material, the steps are as follows:

[0041] Weigh 1.5g of copper nitrate and dissolve in 10mL of deionized water, weigh 1.4g of zinc sulfate and dissolve in 30mL of deionized water, mix after fully dissolving, place on a magnetic stirrer and stir at room temperature for 5 hours to obtain a suspension, and centrifuge , washed with water, and washed with alcohol to obtain cubic ZnCu(OH) 4 ;

[0042] Weigh 1g of the prepared ZnCu(OH) 4 and 3g selenium powder were placed in two arks respectively, in 5%H 2Calcination treatment in a tube furnace under an atmosphere of 95% Ar, the heating rate is 5°C / min, and the temperature is kept at 500°C for 2 hours, and then naturally cooled to room temperature to obtain the nano-cubic zinc-copper selenide material, which can be used as a sodium-ion battery Negative electrode materials for the preparation of sodium-ion batteries.

Embodiment 3

[0044] A preparation method of a nano-cube double metal selenide material, the steps are as follows:

[0045] Weigh nickel nitrate and zinc sulfate with a molar ratio of 0.5:1 and dissolve them in deionized water respectively. The dispersion concentrations of nickel nitrate and zinc sulfate in deionized water are both 0.15 g·mL -1 , after fully dissolving, mix evenly, place on a magnetic stirrer and stir at 10°C for 1 hour to obtain a suspension, centrifuge, wash with water, and wash with alcohol to obtain a nanocube double metal hydroxide;

[0046] Take by weighing nano cube double metal hydroxide and selenium dioxide and be dispersed in deionized water (the mol ratio of described nano cube double metal hydroxide and selenium dioxide is 0.001:1), then place polytetrafluoroethylene reactor , add sodium hydroxide and sodium borohydride to carry out selenization reaction, the reaction temperature is 150 ° C, the reaction time is 1 hour, and naturally cool to room temperature to ...

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Abstract

The invention relates to the technical field of sodium ion batteries, and especially discloses a preparation method of a nano cubic bimetal selenide material. The method comprises the following stepsof: 1) weighing two different metal precursors, respectively dissolving the two different metal precursors in deionized water, performing uniform mixing and stirring to obtain turbid liquid, performing centrifuging, washing with water, and washing with alcohol to obtain a nano cubic layered doubled hydroxide; and 2) weighing a selenium source and the nano cubic layered doubled hydroxide, and performing selenizing to obtain the nano cubic bimetal selenide material. To improve the specific capacity of a battery and prolong the cycle life of the battery when transition metal is used as a sodium-ion battery anode material, according to the preparation method, a certain amount of transition metal precursor is weighed, and a cubic bimetal hydroxide precursor is prepared by adopting a solution method, the nano cubic bimetal selenide material can be used for preparing a sodium ion battery product, and the structural stability of the battery in the charging and discharging process can be effectively improved, so that the cycling stability of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of sodium ion batteries, in particular to a preparation method and application of a nano-cubic double metal selenide material. Background technique [0002] With the development of society and the advancement of science and technology, energy shortage and environmental pollution have become major problems facing the development of today's society. As a new type of high-efficiency electrical energy storage device, lithium-ion batteries have the advantages of high capacity and long cycle life, and have attracted more and more attention and attention from researchers. As we all know, lithium-ion batteries have gone through several generations of innovation and have penetrated into people's daily life. However, as lithium metal is a national strategic resource, its high price and limited storage capacity both limit the application prospects of lithium-ion batteries. In comparison, sodium-ion batteries have bec...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054B82Y30/00B82Y40/00
CPCH01M4/581H01M10/054B82Y40/00B82Y30/00Y02E60/10
Inventor 杨涛翟赟胡朴
Owner UZHOU QIANXUN NEW ENERGY TECH CO LTD
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