CN109560273A - A kind of zinc manganate/milk carbon composite and preparation method thereof - Google Patents

A kind of zinc manganate/milk carbon composite and preparation method thereof Download PDF

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Publication number
CN109560273A
CN109560273A CN201811388080.7A CN201811388080A CN109560273A CN 109560273 A CN109560273 A CN 109560273A CN 201811388080 A CN201811388080 A CN 201811388080A CN 109560273 A CN109560273 A CN 109560273A
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zinc
manganate
milk
zinc manganate
carbon composite
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CN109560273B (en
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柳红东
林烨
伏春平
胡荣
阮海波
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Dragon Totem Technology Hefei Co ltd
Hefei Longzhiyun Pharmaceutical Technology Co ltd
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Chongqing University of Arts and Sciences
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/362Composites
    • H01M4/366Composites as layered products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624Electric conductive fillers
    • H01M4/625Carbon or graphite
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/021Physical characteristics, e.g. porosity, surface area
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/026Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027Negative electrodes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

A kind of zinc manganate/milk carbon composite is by zinc manganate 75% ~ 80%, and it is mass percentage that milk carbon 20% ~ 25%, which forms,;Zinc manganate of the invention/milk carbon composite purity is high, up to 99.3%, pattern is good, and particle uniformity is good, and overall distribution is uniform, large specific surface area, and conductivity is high;The method of the present invention can be widely applied to prepare zinc manganate/milk carbon functional material, preparation process is not in agglomeration, structural stability is not in that carbon structure collapses well, using zinc manganate prepared by the present invention/milk carbon functional material, it is low in cost with simple and easy to get, the advantages that good conductivity, it can be widely applied to the new energy devices such as lithium ion battery, solar battery, be equally applicable to the fields such as biomedicine, gas sensor, information material.

Description

A kind of zinc manganate/milk carbon composite and preparation method thereof
Technical field
The present invention relates to belong to field of material technology, and in particular to a kind of zinc manganate/milk carbon composite and its preparation Method.
Background technique
Zinc manganate is a kind of transition group metallic oxide with spinel structure, belongs to tetragonal crystal system, and physics, chemistry Property is stablized, cheap, environmental-friendly.Simultaneously as a kind of important inorganic functional semiconductor material, in biomedical, gas Before there are important researching value and application in the fields such as quick element, catalyst, solar battery, fuel cell and information material Scape.Carbon material has many advantages, such as that cheap, pollution-free, good electric conductivity and physicochemical properties are stablized.Zinc manganate with Carbon material recombination energy improves the conductivity of material, stability, and electrochemistry capacitance etc. can enhance it as lithium ion battery, super The performance of the electrode materials such as capacitor.And graphene is as a kind of carbon material, preparation method is complicated and is not easy to be made.
The preparation method of existing zinc manganate and graphene composite material, as publication number 104934590A " a kind of zinc manganate/ The patent of the preparation method of graphene composite material " is uniformly mixed simultaneously with graphite oxide aqueous solution and manganese salt and zinc salt solution Hydro-thermal reaction is carried out, zinc manganate and graphene composite material are generated.The main problem of this method is needed first with Hummers Method synthesizes graphite oxide, and is configured to graphite oxide aqueous solution, and synthesis technology is cumbersome, complicated for operation.
Biomass carbon refers to one generated under anaerobic or anoxia condition by Pintsch process by the biomass rich in carbon Kind carbon-rich solids substance.Under normal circumstances, the more substance of carbon will be contained, calcined under inert atmosphere such as argon gas, all Available carbon material.Currently, the used biomass carbon source of researcher include sugarcane, peanut shell, rice shell, flesh of Pulp Citrulli, Egg shell, pollen, milk, banana skin, grass juice factor etc..These biomass carbon sources are ubiquitous and cheap in life, mesh It is preceding not yet by biomass carbon and the compound precedent of zinc manganate.
Just at present apparently, it is low to be easy to appear purity for zinc manganate milk carbon composite, and it is existing that preparation process is easy to appear reunion As influencing its electric conductivity and stability, being also easy to collapsing for carbon structure occur, structural instability, pattern is poor, particle uniformity Difference, overall distribution is not uniform enough, and specific surface area is smaller so that technical problems urgent need to resolve such as electric conductivity are not ideal enough.
Summary of the invention
The present invention first is designed to provide a kind of zinc manganate/milk carbon composite.
The present invention second is designed to provide a kind of preparation method of zinc manganate/milk carbon composite.
The object of the invention is achieved through the following technical solutions:
A kind of zinc manganate/milk carbon composite is by zinc manganate 75% ~ 80%, and it is quality hundred that milk carbon 20% ~ 25%, which forms, Divide content.
Further, above-mentioned zinc manganate/milk carbon composite grain diameter is 25nm ~ 35nm.
A kind of preparation method of zinc manganate/milk carbon composite, which is characterized in that it is with zinc chloride, potassium permanganate It is raw material with sodium fluoride, takes water as a solvent, through the zinc manganate precursor solution formed is mixed, then to mangaic acid zinc precursor Plain chocolate is added in solution, through mixing, hydrothermal synthesis, separation of solid and liquid, centrifuge washing, drying and other steps, formed zinc manganate/ Milk carbon matrix precursor, finally, zinc manganate/milk carbon composite is made by a step high-temperature calcination.
Further, above-mentioned mixing is that zinc chloride, potassium permanganate, sodium fluoride and deionization is added in appropriate vessel Water is mixed 20 ~ 30 minutes, under magnetic stirring, plain chocolate is added, and the magnetic agitation rotating speed is 200 ~ 300r/min, Mixing time is 15 ~ 30 minutes, obtains mixed solution.
Further, the ratio between mole of above-mentioned zinc chloride, potassium permanganate, sodium fluoride be 0.6 ~ 0.8:1.2 ~ 1.6:1.2 ~ 1.6, unit is mmol, and the molal volume ratio of the zinc chloride and deionized water is 0.6 ~ 0.8:60 ~ 80, unit mmol/ml, The molal volume of the zinc chloride and plain chocolate ratio is 0.6 ~ 0.8:1.5 ~ 3, unit mmol/ml.
Further, above-mentioned hydro-thermal reaction be take mixed solution obtained above be placed in liner be polytetrafluoroethylene (PTFE) hydro-thermal it is anti- It answers in kettle, setting temperature is 180 ~ 200 DEG C, is carried out hydro-thermal reaction 20 ~ 24 hours.
Further, above-mentioned separation of solid and liquid and centrifuge washing are that the mixed liquor that will be cooled down after hydro-thermal reaction is placed in centrifuge In, it is separated by solid-liquid separation, precipitating is collected after separation of solid and liquid, first deionized water centrifuge washing is added three times in precipitating, the precipitating The volume ratio of quality and deionized water is 1:60 ~ 200, and washing terminates, and collects and merge precipitating, then with dehydrated alcohol centrifuge washing Three times, the quality of the precipitating and the volume of dehydrated alcohol are 1:60 ~ 200, collect and merge precipitating, spare;The centrifugation turns Speed is 11000r/min, and centrifugation time is 3 ~ 5min.
Further, above-mentioned drying is the precipitating for taking above-mentioned collection to merge, and is placed in drying box, dry 8 at 60 ~ 80 DEG C ~ 48 hours, zinc manganate/milk carbon matrix precursor is made.
Further, above-mentioned step high-temperature calcination is by zinc manganate obtained/milk carbon matrix precursor in air atmosphere 400 ~ 700 1 ~ 2h is calcined at DEG C to get zinc manganate/milk carbon composite.
The present invention have it is following the utility model has the advantages that
Zinc manganate of the invention/milk carbon composite purity is high, up to 99.3%, pattern is good, and particle uniformity is good, whole It is evenly distributed, large specific surface area, conductivity height;The method of the present invention can be widely applied to prepare zinc manganate/milk carbon functional material, Preparation process is not in agglomeration, and structural stability is not in that carbon structure collapses well, using mangaic acid prepared by the present invention Zinc/milk carbon functional material, have it is simple and easy to get, it is low in cost, the advantages that good conductivity, can be widely applied to lithium-ion electric The new energy devices such as pond, solar battery are equally applicable to the fields such as biomedicine, gas sensor, information material.
Detailed description of the invention
Fig. 1 is zinc manganate/milk carbon composite XRD diagram prepared by the embodiment of the present invention 1.
Fig. 2 is zinc manganate/milk carbon composite FESEM figure prepared by the embodiment of the present invention 1.
Fig. 3 is zinc manganate/milk carbon composite TEM figure prepared by the embodiment of the present invention 1.
Fig. 4 is zinc manganate/milk carbon composite cyclic curve figure prepared by the embodiment of the present invention 1.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that following embodiment is only used In invention is further explained, it should not be understood as limiting the scope of the invention, person skilled in art can To make some nonessential modifications and adaptations to the present invention according to aforementioned present invention content.
Embodiment 1
It weighs 0.8mmol zinc chloride, 1.6mmol potassium permanganate, 1.6mmol sodium fluoride to be dissolved in 80mL deionized water, mix Stirring forms uniform solution, and after 30 minutes under violent magnetic agitation, 3mL plain chocolate is added, and continues stirring 30 minutes, system Obtain finely dispersed mixed solution;It is subsequently moved in the hydrothermal reaction kettle that liner is polytetrafluoroethylene (PTFE), at a temperature of 200 DEG C, into Row hydro-thermal reaction 24 hours, then three times by the mixed liquor deionized water and ethyl alcohol that are cooled down after hydro-thermal reaction difference centrifuge washing, The precipitating for collecting each time, is placed in drying box, 24 hours dry at 60 DEG C, and zinc manganate/milk carbon matrix precursor is made;Most Afterwards, presoma is placed in tube furnace, with the heating rate of 5 DEG C/min, and 500 DEG C of calcining 2h in air atmosphere, that is, it makes Obtain zinc manganate/milk carbon composite.
Fig. 1 is that zinc manganate/milk carbon composite of this example preparation tests resulting XRD diagram through XRD diffractometer.From figure In it is found that using the present invention prepared by sample XRD diagram it is consistent with standard zinc manganate card peak position, and principal character peak all with The diffraction maximum of standard is coincide very well, and one or two of miscellaneous peak is only existed, therefore this product is with high purity, and purity may be up to 99.3%.
Fig. 2 is that zinc manganate/milk carbon composite of this example preparation shoots gained through field emission scanning electron microscope SEM figure.It can be seen that zinc manganate/milk carbon nano-particle is of uniform size, average diameter is in 20 ~ 35nm.
Fig. 3 is that zinc manganate/milk carbon composite of this example preparation shoots resulting TEM through transmission electron microscope Figure.It can be seen that milk derived carbon is wrapped in mangaic acid zinc nanoparticles, particle uniformity is good, and overall distribution is uniform, specific surface Product is big.
Fig. 4 is that zinc manganate/milk carbon composite of this example preparation is bent as the circulation of lithium ion battery negative material Line chart.It can be seen that first discharge specific capacity is 1285mAh/g, charge specific capacity 774mAh/g, coulombic efficiency is 60.26%;After circulation 100 times, specific discharge capacity 658mAh/g, charge specific capacity 648mAh/g, coulombic efficiency is 98.52%;After circulation 100 times, specific discharge capacity 994mAh/g, charge specific capacity 978mAh/g, coulombic efficiency is 98.37%.With the increase of cycle-index, zinc manganate/milk carbon negative pole material charging and discharging capacity is gradually reduced, until 50 Secondary circulation left and right, charging and discharging capacity start to grow steadily.Therefore, this preparation method improves the conductivity of composite material, ratio Surface area and stability finally improve zinc manganate/milk carbon negative pole material chemical property.
Embodiment 2
It weighs 0.7mmol zinc chloride, 1.4mmol potassium permanganate, 1.4mmol sodium fluoride to be dissolved in 70mL deionized water, mix Stirring forms uniform solution, and after 25 minutes under violent magnetic agitation, 2mL plain chocolate is added, and continues stirring 25 minutes, system Obtain finely dispersed mixed solution;It is subsequently moved in the hydrothermal reaction kettle that liner is polytetrafluoroethylene (PTFE), at a temperature of 190 DEG C, into Row hydro-thermal reaction 22 hours, then three times by the mixed liquor deionized water and ethyl alcohol that are cooled down after hydro-thermal reaction difference centrifuge washing, The precipitating for collecting each time, is placed in drying box, 32 hours dry at 70 DEG C, and zinc manganate/milk carbon matrix precursor is made;Most Afterwards, presoma is placed in tube furnace, with the heating rate of 5 DEG C/min, and 600 DEG C of calcining 1h in air atmosphere, that is, it makes Obtain zinc manganate/milk carbon composite.
It is tested by the experimental method of embodiment 1, the experimental results showed that, this product purity is high, purity may be up to 99.3%, Of uniform size, average diameter is in 20 ~ 35nm, and particle uniformity is good, and overall distribution is uniform, and large specific surface area, this preparation method mentions The high conductivity of composite material, specific surface area and stability, finally improve zinc manganate/milk carbon negative pole material electrochemistry Performance.
Embodiment 3
It weighs 0.6mmol zinc chloride, 1.2mmol potassium permanganate, 1.2mmol sodium fluoride to be dissolved in 60mL deionized water, mix Stirring forms uniform solution, and after twenty minutes under violent magnetic agitation, 1.5mL plain chocolate is added, continues stirring 15 minutes, Finely dispersed mixed solution is made;It is subsequently moved in the hydrothermal reaction kettle that liner is polytetrafluoroethylene (PTFE), at a temperature of 180 DEG C, It carries out hydro-thermal reaction 20 hours, then the mixed liquor deionized water and ethyl alcohol that cool down after hydro-thermal reaction is distinguished into centrifuge washing three It is secondary, each precipitating is collected, is placed in drying box, it is 15 hours dry at 60 DEG C, zinc manganate/milk carbon matrix precursor is made; Finally, presoma is placed in tube furnace, with the heating rate of 5 DEG C/min, and 400 DEG C of calcining 2h in air atmosphere, i.e., Zinc manganate/milk carbon composite is made.
It is tested by the experimental method of embodiment 1, the experimental results showed that, this product purity is high, purity may be up to 99.0%, Of uniform size, average diameter is in 20 ~ 35nm, and particle uniformity is good, and overall distribution is uniform, and large specific surface area, this preparation method mentions The high conductivity of composite material, specific surface area and stability, finally improve zinc manganate/milk carbon negative pole material electrochemistry Performance.

Claims (9)

1. a kind of zinc manganate/milk carbon composite, which is characterized in that it is by zinc manganate 75% ~ 80%, milk carbon 20% ~ 25% Composition, is mass percentage.
2. zinc manganate as described in claim 1/milk carbon composite, which is characterized in that above-mentioned zinc manganate/milk carbon is compound The grain diameter of material is 25nm ~ 35nm.
3. zinc manganate as claimed in claim 2/milk carbon composite preparation method, which is characterized in that it is with chlorination Zinc, potassium permanganate and sodium fluoride be raw material, take water as a solvent, through be mixed formed zinc manganate precursor solution, then to Plain chocolate is added in zinc manganate precursor solution, is walked through mixing, hydrothermal synthesis, separation of solid and liquid, centrifuge washing, drying etc. Suddenly, zinc manganate/milk carbon matrix precursor is formed, finally, zinc manganate/milk carbon composite is made by a step high-temperature calcination.
4. zinc manganate as claimed in claim 3/milk carbon composite preparation method, which is characterized in that the mixing It is that zinc chloride, potassium permanganate, sodium fluoride and deionized water is added in appropriate vessel, is mixed 20 ~ 30 minutes, in magnetic force Under stirring, plain chocolate is added, the magnetic agitation rotating speed is 200 ~ 300r/min, and mixing time is 15 ~ 30 minutes, must be mixed molten Liquid.
5. zinc manganate as claimed in claim 4/milk carbon composite preparation method, which is characterized in that the zinc chloride, height The ratio between mole of potassium manganate, sodium fluoride is than for 0.6 ~ 0.8:1.2 ~ 1.6:1.2 ~ 1.6, unit is mmol, the zinc chloride Molal volume ratio with deionized water is 0.6 ~ 0.8:60 ~ 80, unit mmol/ml, mole of the zinc chloride and plain chocolate Volume ratio is 0.6 ~ 0.8:1.5 ~ 3, unit mmol/ml.
6. zinc manganate as claimed in claim 5/milk carbon composite preparation method, which is characterized in that above-mentioned hydro-thermal reaction It is that mixed solution obtained above is taken to be placed in the hydrothermal reaction kettle that liner is polytetrafluoroethylene (PTFE), setting temperature is 180 ~ 200 DEG C, It carries out hydro-thermal reaction 20 ~ 24 hours.
7. zinc manganate as claimed in claim 6/milk carbon composite preparation method, which is characterized in that above-mentioned separation of solid and liquid It is that the mixed liquor that will be cooled down after hydro-thermal reaction is placed in centrifuge with centrifuge washing, is separated by solid-liquid separation, is received after separation of solid and liquid First deionized water centrifuge washing is added three times in collection precipitating, precipitating, the volume ratio of the quality of the precipitating and deionized water be 1:60 ~ 200, washing terminates, and collects and merge precipitating, then three times with dehydrated alcohol centrifuge washing, the quality and dehydrated alcohol of the precipitating Volume be 1:60 ~ 200, collect and merge precipitating, it is spare;The centrifugal rotational speed be 11000r/min, centrifugation time be 3 ~ 5min。
8. zinc manganate as claimed in claim 7/milk carbon composite preparation method, which is characterized in that above-mentioned drying is to take The precipitating that above-mentioned collection merges, is placed in drying box, 8 ~ 48 hours dry at 60 ~ 80 DEG C, before zinc manganate/milk carbon is made Drive body.
9. zinc manganate as claimed in claim 8/milk carbon composite preparation method, which is characterized in that above-mentioned step high temperature Calcining is that zinc manganate obtained/milk carbon matrix precursor is calcined to 1 ~ 2h at 400 ~ 700 DEG C of air atmosphere to get zinc manganate/ox Milk carbon composite.
CN201811388080.7A 2018-11-21 2018-11-21 Zinc manganate/milk carbon composite material and preparation method thereof Active CN109560273B (en)

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