CN106848289B - Lotus root-like flaky spinel type ZnMn2O4Method for preparing powder - Google Patents

Lotus root-like flaky spinel type ZnMn2O4Method for preparing powder Download PDF

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CN106848289B
CN106848289B CN201710105240.1A CN201710105240A CN106848289B CN 106848289 B CN106848289 B CN 106848289B CN 201710105240 A CN201710105240 A CN 201710105240A CN 106848289 B CN106848289 B CN 106848289B
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CN106848289A (en
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龙飞
郑国源
邹正光
吴一
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Guilin University of Technology
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
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Abstract

The invention discloses a lotus root-like flaky spinel type ZnMn2O4A method for preparing powder. Dissolving divalent zinc salt and divalent manganese salt in an organic solvent, quickly reaching the reaction temperature through microwave irradiation, uniformly heating and quickly nucleating reaction liquid due to microwave irradiation and ultrasonic oscillation to obtain a precursor product with a specific morphology, and calcining the precursor product to obtain the lotus-root-like flaky spinel type ZnMn2O4And (3) powder. Unique lotus root like sheet structure ZnMn2O4The lithium ion battery has a good lithium ion transmission channel, accumulation and collapse phenomena are not easy to occur in the charging and discharging process, the flaky structure can keep the structure not easy to damage in the mixing, accumulation and tabletting processes in the early-stage electrode material preparation process, and the cycling stability of the battery is well kept. The method has simple operation and low cost of the required raw materials, and the prepared powder has a lotus root-like sheet structure, is uniformly dispersed and has controllable particle size.

Description

Lotus root-like flaky spinel type ZnMn2O4Method for preparing powder
Technical Field
The invention belongs to the technical field of micro-nano material preparation, and particularly relates to a lotus root-like flaky spinel type ZnMn2O4Preparation method of powder and ZnMn prepared by preparation method2O4The powder is used for lithium ion cathode materials and can also be used for photocatalytic degradation of organic dyes.
Background
The lithium ion electrode material is a hot spot of research of researchers in various countries at present, the transition metal oxide can generate reversible reaction with lithium, and the transition metal oxide is researched as a lithium ion battery cathode material in the last decade, wherein the manganese-based metal oxide is concerned by researchers due to the characteristics of low potential, abundant natural resources, environmental friendliness and the like. However, manganese-based metal oxides have the following disadvantages during the charge and discharge of lithium ion batteries: large volume change and easy pulverization. The above reasons result in poor battery cycle performance of manganese-based metal oxides as negative electrode materials. Subsequently, the researchers found that in the composite material of manganese-based system, ZnMn of spinel structure of multi-manganese-based metal oxide2O4Has better battery cycle performance than manganese-based metal oxide unit.
ZnMn2O4The elements in the material are rich in resources in nature, so that the material has the advantages of resources and cost, and the material also has the characteristics of no toxicity, environmental friendliness and the like. Further, ZnMn of spinel structure2O4Has a lower potential than that of the manganese-based metal oxide unit, and can more easily perform lithium ion transport as a negative electrode material of a battery. Furthermore, in the spinel ZnMn2O4In the structure of (1), Zn and Mn can mutually act in a synergistic way due to different electrode potentials in the charge-discharge cycle process of the battery, and can be used as a mutually buffered matrix to greatly reduce the change of the material in volume and stabilize the crystal structure of the material, thereby obtaining better cyclicity than that of a unit manganese-based metal oxide. Research results show that Zn can perform alloying reaction with Li in the process of lithium ion charge-discharge circulation, so that the material has high theoretical specific capacity (784 mAh/g). The high theoretical specific capacity and the stability of the crystal structure make it possible to replace the traditional graphite cathode material and become the cathode material for the development of the next generation of lithium ion batteries.
However, similar to other negative electrode materials, in the process of charging and discharging of the battery, the crystal structure of the negative electrode material is greatly influenced due to the insertion and extraction of lithium ions, and spinel ZnMn with common morphology is adopted2O4The materials, especially the aggregate, are easy to accumulate and collapse in the charge and discharge process of the lithium ion battery, so that the cycle performance of the lithium ion battery is reduced, and ZnMn is restricted2O4The spinel cathode material is applied to a lithium ion battery. Recent research shows that ZnMn with special shapes such as spherical structure, core-shell structure, two-dimensional structure, nanowire and the like2O4The lithium ion battery cathode material has more stable charge-discharge cycle performance as a cathode material.
Disclosure of Invention
In view of the above ZnMn2O4The invention aims to provide a low-cost and high-quality sheet-like spinel ZnMn with low cost2O4Preparation method of powder, which can not only allow ZnMn to be prepared2O4The powder is uniformly dispersed, and the prepared ZnMn2O4The powder possesses unique class lotus root slice column structure, and this powder has great specific surface area and sheet structure, at the in-process that lithium ion embedding and deviate from, can stable material's structure itself, is difficult for appearing gathering and the phenomenon of collapsing to sheet structure can keep the indestructible in mixing, piling up and the preforming in-process in electrode material preparation process in earlier stage, has better guaranteed battery material's stability.
The method comprises the steps of adding a reactant solution into a reaction container by adopting an ultrasonic microwave-assisted solvothermal method, controlling the reaction temperature, the reaction time, the microwave power and the ultrasonic power to obtain a precursor product, and sintering the precursor product to obtain the ZnMn in the shape of a lotus-root-like plate2O4And (3) powder.
The method comprises the following specific steps:
(1) weighing 1-10 mmol of divalent zinc salt and 2-20 mmol of divalent manganese salt, adding into 20-100 mL of alcohol, and stirring for 30-90 minutes to obtain a mixed solution.
(2) Transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring the three-mouth beaker into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 160-190 ℃, the reaction time to be 1-4 hours, the microwave power to be 200-400W and the ultrasonic power to be 20-80W, and cooling to room temperature after the reaction is finished to obtain the suspension.
(3) And (3) respectively centrifugally washing the turbid liquid prepared in the step (2) for 5-6 times by using distilled water and ethanol, wherein the rotating speed of a centrifugal machine is 7000-10000 rpm, the centrifugal time is 5-10 min, and the centrifugally washed product is dried in an air-blast drying oven at 80 ℃ for 8-48 hours to obtain a precursor product.
(4) Heating the precursor product prepared in the step (3) to 450-700 ℃ at the speed of 1-10 ℃/min in a muffle furnace, preserving the temperature for 2-5 hours, and naturally cooling to room temperature to obtain the lotus-root-like flake spinel type ZnMn2O4And (3) powder.
The alcohol is one or more of ethylene glycol, diethylene glycol and glycerol.
The divalent zinc salt is Zn (CH)3COO)2∙2H2O or Zn (NO)3)2。
The divalent manganese salt is Mn (CH)3COO)2∙4H2O or Mn (NO)3)2∙4H2O。
The method has simple operation and low cost of the required raw materials, and the prepared powder has a lotus root-like sheet structure, is uniformly dispersed and has controllable particle size.
Drawings
FIG. 1 shows a lotus-root-like slab spinel type ZnMn prepared in example 1 of the present invention2O4X-ray diffraction pattern of the powder.
FIG. 2 shows a lotus-root-like slab spinel type ZnMn obtained in example 1 of the present invention2O4Scanning electron microscope image of powder field emission.
Detailed Description
Example 1:
(1) weighing 1 mmol of Zn (CH)3COO)2∙2H2O and 2 mmol of Mn (CH)3COO)2∙4H2O was added to 20mL of ethylene glycol, and the mixture was stirred for 30 minutes to obtain a mixed solution.
(2) And (2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 160 ℃, the reaction time to be 4 hours, the microwave power to be 200W and the ultrasonic power to be 20W, and cooling to room temperature after the reaction is finished to obtain a suspension.
(3) And (3) respectively centrifuging and washing the suspension prepared in the step (2) for 5 times by using distilled water and ethanol, wherein the rotating speed of a centrifuge is 7000 rpm, the centrifuging time is 5 min, and drying the product after centrifugal washing in an air-blast drying oven at 80 ℃ for 8 hours to obtain a precursor product.
(4) Heating the precursor product prepared in the step (3) to 700 ℃ at the speed of 1 ℃/min in a muffle furnace, preserving the temperature for 2 hours, and then naturally cooling to room temperature to obtain the lotus-root-like flaky spinel ZnMn2O4And (3) powder.
Example 2:
(1) weighing 10 mmol of Zn (CH)3COO)2∙2H2O and 20 mmol of Mn (CH)3COO)2∙4H2O was added to 50mL of glycerin, and the mixture was stirred for 90 minutes to obtain a mixed solution.
(2) And (2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 190 ℃, the reaction time to be 1 hour, the microwave power to be 400W and the ultrasonic power to be 50W, and cooling to room temperature after the reaction is finished to obtain a suspension.
(3) And (3) respectively centrifuging and washing the suspension prepared in the step (2) for 6 times by using distilled water and ethanol, wherein the rotation speed of a centrifuge is 10000 rpm, the centrifuging time is 10 min, and drying the product after centrifugal washing in an air-blast drying oven at 80 ℃ for 24 hours to obtain a precursor product.
(4) Heating the precursor product prepared in the step (3) to 550 ℃ at the speed of 3 ℃/min in a muffle furnace, preserving the temperature for 5 hours, and then naturally cooling to room temperature to obtain the lotus-root-like flaky spinel ZnMn2O4And (3) powder.
Example 3:
(1) weighing 5 mmol of Zn (NO)3)2And 10 mmol of Mn (NO)3)2∙4H2O was added to 50mL of diethylene glycol, and the mixture was stirred for 60 minutes to obtain a mixture.
(2) And (2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 190 ℃, the reaction time to be 4 hours, the microwave power to be 300W and the ultrasonic power to be 80W, and cooling to room temperature after the reaction is finished to obtain a suspension.
(3) And (3) respectively centrifuging and washing the suspension prepared in the step (2) for 6 times by using distilled water and ethanol, wherein the rotating speed of a centrifuge is 8000 rpm, the centrifuging time is 10 min, and drying the product after centrifugal washing in an air-blast drying oven at 80 ℃ for 48 hours to obtain a precursor product.
(4) Heating the precursor product prepared in the step (3) to 600 ℃ in a muffle furnace at the speed of 5 ℃/min, preserving the temperature for 5 hours, and then naturally cooling to room temperature to obtain the lotus-root-like flaky spinel ZnMn2O4And (3) powder.
Example 4:
(1) 3 mmol of Zn (CH) are weighed3COO)2∙2H2O and 6 mmol of Mn (CH)3COO)2∙4H2O was added to 50mL of ethylene glycol and 50mL of glycerin, and the mixture was stirred for 60 minutes to obtain a mixed solution.
(2) And (2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 180 ℃, the reaction time to be 2 hours, the microwave power to be 300W and the ultrasonic power to be 20W, and cooling to room temperature after the reaction is finished to obtain a suspension.
(3) And (3) respectively centrifuging and washing the suspension prepared in the step (2) for 6 times by using distilled water and ethanol, wherein the rotating speed of a centrifuge is 9000 rpm, the centrifuging time is 10 min, and drying the product after centrifugal washing in an air-blast drying oven at the temperature of 80 ℃ for 32 hours to obtain a precursor product.
(4) Heating the precursor product prepared in the step (3) to 450 ℃ in a muffle furnace at the speed of 10 ℃/min, preserving the temperature for 5 hours, and then naturally cooling to room temperature to obtain the lotus-root-like flaky spinel ZnMn2O4And (3) powder.
Example 5:
(1) weighing 7 mmol of Zn (CH)3COO)2∙2H2O and 14 mmol Mn (NO)3)2∙4H2O was added to 35 mL of diethylene glycol and 45 mL of ethylene glycol, and the mixture was stirred for 60 minutes to obtain a mixture.
(2) And (2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 180 ℃, the reaction time to be 3 hours, the microwave power to be 200W and the ultrasonic power to be 60W, and cooling to room temperature after the reaction is finished to obtain a suspension.
(3) And (3) respectively centrifuging and washing the suspension prepared in the step (2) for 6 times by using distilled water and ethanol, wherein the rotation speed of a centrifuge is 10000 rpm, the centrifuging time is 10 min, and drying the product after centrifugal washing in an air-blast drying oven at 80 ℃ for 12 hours to obtain a precursor product.
(4) The precursor prepared in the step (3) is producedHeating the substance to 700 ℃ at the speed of 6 ℃/min in a muffle furnace, preserving the heat for 3 hours, and then naturally cooling to room temperature to obtain the lotus-root-like spinel-shaped ZnMn2O4And (3) powder.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (1)

1. Lotus root-like flaky spinel type ZnMn2O4The preparation method of the powder is characterized by comprising the following specific steps:
(1) weighing 1-10 mmol of divalent zinc salt and 2-20 mmol of divalent manganese salt, adding into 20-100 mL of alcohol, and stirring for 30-90 minutes to obtain a mixed solution;
(2) transferring the mixed solution prepared in the step (1) into a three-mouth beaker, then transferring the mixed solution into a microwave reactor, inserting an ultrasonic probe into the mixed solution, setting the reaction temperature to be 160-190 ℃, the reaction time to be 1-4 hours, the microwave power to be 200-400W and the ultrasonic power to be 20-80W, and cooling to room temperature after the reaction is finished to obtain a suspension;
(3) respectively centrifugally washing the suspension prepared in the step (2) for 5-6 times by using distilled water and ethanol, wherein the rotating speed of a centrifugal machine is 7000-10000 rpm, the centrifugal time is 5-10 min, and drying the centrifugally washed product in an air-blast drying oven at 80 ℃ for 8-48 hours to obtain a precursor product;
(4) heating the precursor product prepared in the step (3) to 450-700 ℃ at the speed of 1-10 ℃/min in a muffle furnace, preserving the temperature for 2-5 hours, and naturally cooling to room temperature to obtain the lotus-root-like flake spinel type ZnMn2O4Powder;
the alcohol is one or more of ethylene glycol, diethylene glycol and glycerol;
the divalent zinc salt is Zn (CH)3COO)2∙2H2O or Zn (NO)3)2；
The divalent manganese salt is Mn (CH)3COO)2∙4H2O or Mn (NO)3)2∙4H2O。
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CN107293748B (en) * 2017-06-21 2019-09-06 盐城工学院 A kind of ZnMn2S4Nanosphere, preparation method and application
CN108539172B (en) * 2018-04-19 2020-05-29 吉首大学 Preparation method of composite spherical positive electrode material of high-power water-based zinc ion battery
CN108558202B (en) * 2018-07-27 2020-04-17 望江县天长光学仪器有限公司 Optical glass with high refractive index

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102936048A (en) * 2012-11-14 2013-02-20 陕西科技大学 Leaf-type NH4V3O8 microcrystalline preparation method
CN103420411A (en) * 2013-07-11 2013-12-04 南京航空航天大学 Ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles
CN105322167A (en) * 2015-11-03 2016-02-10 山东精工电子科技有限公司 Pressure-controlling deaggregating synthetic method for lithium iron phosphate positive electrode material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102936048A (en) * 2012-11-14 2013-02-20 陕西科技大学 Leaf-type NH4V3O8 microcrystalline preparation method
CN103420411A (en) * 2013-07-11 2013-12-04 南京航空航天大学 Ultrasonic-assisted microwave controllable preparation method of Cu2ZnSnS4 nano-particles
CN105322167A (en) * 2015-11-03 2016-02-10 山东精工电子科技有限公司 Pressure-controlling deaggregating synthetic method for lithium iron phosphate positive electrode material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Synthesis and electrochemical properties of ZnMn2O4 anode for lithium-ion batteries;Chuanqi Feng等;《Electrochimica Acta》;20150820;第178卷;第848页右栏第2段 *

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