CN107394183A - A kind of preparation method of MnO nanocrystalline composite materials of porous carbon coating and its application in lithium battery - Google Patents
A kind of preparation method of MnO nanocrystalline composite materials of porous carbon coating and its application in lithium battery Download PDFInfo
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- CN107394183A CN107394183A CN201710680187.8A CN201710680187A CN107394183A CN 107394183 A CN107394183 A CN 107394183A CN 201710680187 A CN201710680187 A CN 201710680187A CN 107394183 A CN107394183 A CN 107394183A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- 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
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of preparation method of the MnO nanocrystalline composite materials of porous carbon coating, the described method comprises the following steps：(a1) under 20 25 DEG C of temperature environments, the mixed solution of the ethanol of trimesic acid and water is added dropwise in four water manganese acetates and the ethanol of polyvinylpyrrolidone and the mixed solution of water, 20 30 hours are stood after stirring, is centrifuged, obtains predecessor Mn BTC micron balls；(a2) predecessor Mn BTC micron balls are placed in tubular type crucible furnace, in inert gas 500 700 DEG C are warming up to 7 13 DEG C/min speed, then calcine 13 hours at this temperature, after naturally cooling to 20 25 DEG C, obtain the MnO nanocrystalline composite materials of porous carbon coating.The advantage of the invention is that the MnO composites by the dinectly bruning complex preparation carbon coating in nitrogen, the processing step for the MnO composites for preparing carbon coating is effectively simplified, and preparation technology is simply efficient, safety is easy, synthesis cycle is short, is expected to be promoted and industrialization production.
Description
Technical field
The present invention relates to nano composite material preparing technical field, is more particularly to a kind of MnO nanometers of porous carbon coating
The preparation method of crystal composite material and its application in lithium battery.
Background technology
Because lithium battery has the characteristics that higher energy density and power density, it is widely used in electric automobile and electricity
The mobile energy storage device of sub- product.When selecting the negative material of lithium battery, with traditional graphite-phase ratio, transition metal oxide
Because with higher theoretical specific capacity and by the extensive concern of numerous scientific workers.In numerous transition metal oxides,
MnO theoretical specific capacity reaches 756mAh g-1, and rich reserves on earth, it is cheap, there is no any harm to environment.
In addition, MnO has higher output voltage and relatively low operating voltage, these properties can meet the need of lithium cell cathode material
Ask.It is but Dutch《The nanometer energy》Although magazine (Nano Energy., 2014, volume 9, page 41), which reports MnO, to be had
Higher theoretical specific capacity, but Volumetric expansion easily occurs in charge and discharge process, cause it to store up lithium degradation.So
And Britain《Materials chemistry A》Magazine (J.Mater.Chem.A, 2016, volume 4, page 920) reports carbon material not only can be with
Avoid MnO that capacity attenuation occurs in charge and discharge process, but also the electric conductivity of whole electrode material can be improved.Holland
《Carbon》Magazine (carbon., 2016, volume 99, page 138) equally reports that tiny MnO is nanocrystalline to be distributed in porous carbon
Expect in substrate, it is possible to prevente effectively from Volumetric expansions of the MnO in charge and discharge process, also, this porous carbon material base
Bottom is advantageous to electrolyte and electronics in its internal transmission.
But report that the preparation method of the MnO nanocrystalline composite materials of synthesizing porous carbon coating is complicated at present, Ren Menchang
The MnO composites of carbon coating are prepared using two-step method, i.e. the first step prepares MnO, then again in the MnO surfaces bag prepared in advance
Cover carbon-coating.This preparation method not only complex process, and very time-consuming, seriously hinder the business of the MnO composites of carbon coating
Industry application cost is expensive, is unfavorable for commercialization and promotes.
The content of the invention
The technical problems to be solved by the invention are the provision of that a kind of preparation method is simple, performance is good, cost is low, favorably
Preparation method in the MnO nanocrystalline composite materials of the porous carbon coating of business promotion and its application in lithium battery.
The present invention is that solve above-mentioned technical problem by the following technical programs：
A kind of preparation method of the MnO nanocrystalline composite materials of porous carbon coating, the described method comprises the following steps：
(a1) under 20-25 DEG C of temperature environment, the mixed solution of the ethanol of trimesic acid and water is added dropwise to four water second
In the ethanol of sour manganese and polyvinylpyrrolidone and the mixed solution of water, 20-30 hours are stood after stirring, preferably 24 is small
When, centrifuge, obtain predecessor Mn-BTC micron balls；
(a2) the predecessor Mn-BTC micron balls are placed in tubular type crucible furnace, with 5-15 DEG C/min in inert gas
Speed, preferably with 10 DEG C/min speed, be warming up to 500-700 DEG C, preferably 600 DEG C, then at this temperature calcine 1-3 it is small
When, preferably 2 hours, after naturally cooling to 20-25 DEG C, obtain the MnO nanocrystalline composite materials of porous carbon coating.
Preferably, in the step (a1), the concentration of the ethanol of the trimesic acid and the mixed solution of water is 80-
100mg/mL, preferably 90mg/mL, four water in the four water manganese acetate and the ethanol of polyvinylpyrrolidone and the mixed solution of water
The mass ratio of manganese acetate and polyvinylpyrrolidone is 1:5-8, preferably 1:6.1, the ethanol of the trimesic acid and water
The volume ratio of mixed solution and the mixed solution of the ethanol and water of the four water manganese acetate and polyvinylpyrrolidone is 1:1.
Preferably, the ethanol of the trimesic acid and the mixed solution of water in the step (a1) and the four water second
In the ethanol of sour manganese and polyvinylpyrrolidone and the mixed solution of water, the volume ratio of ethanol and water is 1:1.
Preferably, in the step (a2), the inert gas is nitrogen.
Invention additionally discloses a kind of MnO nanocrystalline composite materials of the porous carbon coating prepared using above-mentioned preparation method to exist
Application in lithium battery.
Above-mentioned application is realized by following steps：
(b1) MnO nanocrystalline composite materials, acetylene black and the Kynoar of above-mentioned porous carbon coating are mixed and made into mud
Slurry like material, the muddy material is evenly coated on copper foil, at 70-90 DEG C, after being dried in preferably 80 DEG C of baking oven, by copper
Paper tinsel is cut into a diameter of 10-15mm disk, is as loaded with the electrode slice of the MnO nanocrystalline composite materials of porous carbon coating；
(b2) using the electrode slice of the MnO nanocrystalline composite materials for being loaded with porous carbon coating as positive pole, with a diameter of
10-15mm circular metal lithium piece is negative pole, using by ethylene carbonate and diethyl carbonate mixing formed, containing concentration as
The mixed solution of 1mol/L lithium hexafluoro phosphate is electrolyte, using a diameter of 12-17mm circular polypropylene film as barrier film,
Button half-cell is assembled into the glove box of argon atmosphere protection；
(b3) charge-discharge performance test is carried out to the button half-cell.
Preferably, in the step (b1), the MnO nanocrystalline composite materials of the porous carbon coating, acetylene black with it is poly-
The mass ratio of vinylidene is 6-8:1-3:1-3.
Preferably, in the step (b2), the mass ratio of the ethylene carbonate and diethyl carbonate is 1:1.
Preferably, in the step (b2), the electrode of the MnO nanocrystalline composite materials for being loaded with porous carbon coating
The diameter of piece is equal with the diameter of the circular metal lithium piece, and less than the diameter of the circular polypropylene film.
Preferably, in the step (b3), the charge-discharge performance method of testing is：By the button half-cell in
Under 100mA/g current density, charge/discharge cycles 40-60 times, its discharge capacity situation of change is observed；By the electricity of the button half
Pond is under 1000mA/g current density, charge/discharge cycles 800-1000 times, observes its discharge capacity situation of change；By described in
Button half-cell carries out charging and discharging under 100mA/g, 200mA/g, 400mA/g, 800mA/g, 1000mA/g current density
Loop test.
The present invention has advantages below compared with prior art：1. the present invention can pass through the dinectly bruning complex in nitrogen
The MnO composites of carbon coating are prepared, effectively simplify the processing step for the MnO composites for preparing carbon coating.
2. MnO particle diameters prepared by the present invention are smaller, and are distributed in porous carbon substrate.Predecessor is calcined in nitrogen
During, have substantial amounts of carbon dioxide and hydrone and overflow, the carbon substrate for causing to finally give has loose structure.And in carbon
In the forming process of material, it is nanocrystalline to generate tiny MnO.The present invention prepares the MnO nanocomposite materials of porous carbon coating
The technique of material is simply efficient, and safety is easy, and synthesis cycle is short, is expected to be promoted and industrialization production.
3. the MnO nanocrystalline composite materials for the porous carbon coating that the present invention obtains can be applied in lithium battery.Porous carbon
Substrate is advantageous to lithium ion and electrolyte disengaging active material；Larger specific surface area and loose structure can increase MnO and electricity
The contact area of liquid is solved, shortens the diffusion length of lithium ion and electrolyte；Tiny MnO is nanocrystalline to be provided relative to block materials
More storage lithium avtive spots.Summary advantage, the MnO nanocrystalline composite materials for the porous carbon coating that the present invention obtains are made
There is very high capacity and good cyclical stability for lithium cell cathode material.
Brief description of the drawings
Fig. 1 is the thermogravimetric curve figure (Fig. 1 b) under the infrared spectrogram (Fig. 1 a) and nitrogen of predecessor in embodiment 1；
Fig. 2 is the stereoscan photograph (Fig. 2 a) and transmission electron microscope photo (Fig. 2 b) of predecessor in embodiment 1；
Fig. 3 is the X-ray diffractogram of the MnO nanocrystalline composite materials of resulting porous carbon coating in embodiment 2；
Fig. 4 is the Raman spectrogram of the MnO nanocrystalline composite materials of resulting porous carbon coating in embodiment 2；
Fig. 5 is the stereoscan photograph (Fig. 5 a) of the MnO nanocrystalline composite materials of resulting porous carbon coating in embodiment 2
With transmission electron microscope photo (Fig. 5 b, 5c, 5d)；
Fig. 6 is the thermogravimetric curve of the MnO nanocrystalline composite materials of resulting porous carbon coating in embodiment 2 under air
Figure；
Fig. 7 is nitrogen adsorption-desorption curve of the MnO nanocrystalline composite materials of resulting porous carbon coating in embodiment 2
Figure；
Fig. 8 is discharge capacity and cycle-index curve of the gained battery of embodiment 3 when current density is 100mA/g；
Fig. 9 is discharge capacity and cycle-index curve of the gained battery of embodiment 3 when current density is 1000mA/g；
Figure 10 is discharge capacity and cycle-index curve of the gained battery of embodiment 3 under different discharge current densities.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1：The preparation and determination of predecessor Mn-BTC micron balls
Under 25 DEG C of environment of room temperature, 20mL is contained into 180mg trimesic acids (C9O6H6) ethanol and water (volume ratio is
1:1) mixed solution is added dropwise to the four water manganese acetate (Mn (CH that 20mL contains 98mg3COO)·4H2) and 0.6g polyvinyl pyrroles O
The ethanol of alkanone (PVP) and water (volume ratio 1:1) in mixed solution, 24 hours are stood after stirring, centrifuges, obtains
To predecessor Mn-BTC micron balls (complex that manganese ion is formed with trimesic acid).
The predecessor is analyzed using the thermogravimetric analysis under infrared spectrum analysis and nitrogen, analysis result such as Fig. 1 institutes
Show.It can be seen that respectively in 1560,1440 and 1380cm from Fig. 1 a infrared spectrogram-1Three peaks that place occurs can belong to
For the COO in trimesic acid-With Mn2+Key is formd, shows to be successfully prepared complex；Can from Fig. 1 b thermogravimetric curve
Go out, predecessor about temperature, which is raised at 170 DEG C, starts first weightless platform occur, herein it is considered that the quality lost is
The small molecule (such as water, carbon dioxide) of predecessor absorption；Start second weightless platform occur when temperature is raised to 580 DEG C, this
Place is it is considered that the quality lost is that have caused by the decomposition of predecessor.Further utilize ESEM (SEM) and transmission electron microscope
(TEM) predecessor is analyzed, electromicroscopic photograph is as shown in Figure 2.It can be seen that predecessor with micron from Fig. 2 a SEM photograph
The form of ball is present, and particle diameter is at 2 μm or so, and pattern is homogeneous；It can be seen that predecessor is solid knot from Fig. 2 b TEM photos
Structure.
Embodiment 2：The preparation and determination of the MnO nanocrystalline composite materials of porous carbon coating
The predecessor for implementing to obtain in 1 is placed in tubular type crucible furnace, with 10 DEG C/min speed liter in nitrogen atmosphere
Temperature is to 600 DEG C；Calcine 2 hours at this temperature again, after naturally cooling to 25 DEG C of room temperatures, the MnO of porous carbon coating can be obtained
Nanocrystalline composite material.
The chemical composition of product can be determined by X-ray diffraction after calcining.The X-ray diffraction of products therefromFigure is as shown in Figure 3.From figure 3, it can be seen that the X-ray diffraction peak of products therefrom and standard JCPDS cards
Piece No.75-0626 is consistent, contains MnO thing phases in the sample for illustrating to obtain.Raman spectrum point further is carried out to products therefrom
Analysis, analysis result are as shown in Figure 4.Figure 4, it is seen that in 1350 and 1585cm-1It is carbon material typical case that two peaks, which occurs, in place
D and G band peak, show to contain carbon material in composite.It is resulting with reference to X-ray diffraction and Raman Characterization result
Sample is the MnO nanocrystalline composite materials of carbon coating.Electronic Speculum (SEM) and transmission electron microscope (TEM) point are scanned to products therefrom
Analysis, electromicroscopic photograph are as shown in Figure 5.The products therefrom that be can be seen that from Fig. 5 a SEM figure photos by calcining can still be kept
The profile of precursor micron ball, particle diameter at 2 μm or so, simultaneously because in calcination process internal gas effusion, generate fluffy
Loose structure, the surface of micron ball becomes coarse.Fig. 5 b TEM photos can be seen that resulting composite and still protect
Solid construction is held.TEM photos are differentiated as shown in Fig. 5 c, Fig. 5 d, it can be seen that being transmitted in high-resolution micro- from Fig. 5 c, Fig. 5 d
It can be seen that substantial amounts of MnO is nanocrystalline under mirror to be distributed in carbon substrate.Further to the MnO nanocomposite materials of gained carbon coating
Material carries out thermogravimetric analysis under air, and gained thermogravimetric curve is as shown in Figure 6.From fig. 6 it can be seen that in atmosphere, from 232
DEG C start, composite starts weightlessness.In addition, calcined composite material, MnO can be by the dioxygen oxidation in air in atmosphere
Mn2O3；Therefore, can be drawn by calculating, the ratio shared by carbon material is 49% in the composite.In addition, also to gained carbon
The MnO nanocrystalline composite materials of cladding carry out nitrogen adsorption-desorption test, gained nitrogen adsorption-desorption curve as shown in fig. 7,
The ratio surface that prepared composite is can be seen that from 7 figures is 297m2/ g, average pore size 4.3nm, and with mesoporous
Structure.
Embodiment 3：Application of the MnO nanocrystalline composite materials of carbon coating in lithium battery
The MnO nanocrystalline composite materials and second for the carbon coating that will be obtained under calcining heat under heating rate is 10 DEG C/min
Acetylene black and Kynoar PVDF in mass ratio 8:1:1 is mixed and made into muddy material, and the muddy material is evenly coated in
On copper foil, after being dried in 80 DEG C of baking oven, copper foil is cut into a diameter of 10-15mm disk, is as loaded with porous carbon bag
The electrode slice of the MnO nanocrystalline composite materials covered；Using be loaded with carbon coating MnO nanocrystalline composite materials electrode slice as just
Pole, using a diameter of 14mm circular metal lithium piece as negative pole, with by ethylene carbonate EC and diethyl carbonate DEC in mass ratio 1:
Lithium hexafluoro phosphate LiPF that 1 mixing is formed, containing concentration for 1mol/L6Mixed solution be electrolyte, with a diameter of 16mm's
Circular polypropylene film is barrier film, is assembled into button half-cell in the glove box of argon atmosphere protection, button half-cell is entered
Row charging and discharging is tested.
The use of battery test system is that Neware BTS-610 are tested it.As shown in figure 8, it is in current density
Under 100mA/g, after circulating 50 times, discharge capacity is maintained at 1159mAh/g.As shown in figure 9, it is 1000mA/g in current density
Under, after circulating 1000 times, discharge capacity is maintained at 613mAh/g.Multiplying power test and an important ginseng for weighing battery stabilization
Number.The battery prepared by embodiment is respectively 100mA/g, 200mA/g, 400mA/g, 800mA/g, 1000mA/g in current density
Under conditions of test, its charge and discharge cycles curve is as shown in Figure 10.It can be seen that when current density is respectively 100mA/
When g, being tested under conditions of 200mA/g, 400mA/g, 800mA/g, 1000mA/g, its corresponding average size be 620mAh/g,
504mAh/g, 386mAh/g, 252mAh/g and 113mAh/g.This result shows that the battery in the present embodiment has preferable
Stability.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of preparation method of the MnO nanocrystalline composite materials of porous carbon coating, it is characterised in that methods described includes following
Step：
(a1) under 20-25 DEG C of temperature environment, the mixed solution of the ethanol of trimesic acid and water is added dropwise to four water manganese acetates
With in the ethanol of polyvinylpyrrolidone and the mixed solution of water, 20-30 hours are stood after stirring, centrifuge, obtain
Predecessor Mn-BTC micron balls；
(a2) the predecessor Mn-BTC micron balls are placed in tubular type crucible furnace, with 7-13 DEG C/min speed in inert gas
Rate is warming up to 500-700 DEG C, then calcines 1-3 hours at this temperature, after naturally cooling to 20-25 DEG C, obtains porous carbon bag
The MnO nanocrystalline composite materials covered.
2. the preparation method of the MnO nanocrystalline composite materials of porous carbon coating according to claim 1, it is characterised in that
In the step (a1), the concentration of the ethanol of the trimesic acid and the mixed solution of water is 80-100mg/mL, described four
The matter of four water manganese acetates and polyvinylpyrrolidone in the mixed solution of the ethanol and water of water manganese acetate and polyvinylpyrrolidone
It is 5-8 to measure ratio, the ethanol of the trimesic acid and the mixed solution of water and the four water manganese acetate and polyvinylpyrrolidone
Ethanol and water mixed solution volume ratio be 1:1.
3. the preparation method of the MnO nanocrystalline composite materials of porous carbon coating according to claim 1, it is characterised in that
In the ethanol of the trimesic acid and the mixed solution of water of the step (a1) and the four water manganese acetate and polyethylene pyrrole
In the ethanol of pyrrolidone and the mixed solution of water, the volume ratio of ethanol and water is 1:1.
4. the preparation method of the MnO nanocrystalline composite materials of porous carbon coating according to claim 1, it is characterised in that
In the step (a2), the inert gas is nitrogen.
5. the preparation method institute of the MnO nanocrystalline composite materials of porous carbon coating according to any one of claim 1 to 4
Application of the MnO nanocrystalline composite materials of the porous carbon coating prepared in lithium battery.
6. application according to claim 5, it is characterised in that the application is realized by following steps：
(b1) MnO nanocrystalline composite materials, acetylene black and the Kynoar of the porous carbon coating are mixed and made into muddy
Material, the muddy material is evenly coated on copper foil, after being dried in 70-90 DEG C of baking oven, copper foil be cut into a diameter of
10-15mm disk, as it is loaded with the electrode slice of the MnO nanocrystalline composite materials of porous carbon coating；
(b2) using the electrode slice of the MnO nanocrystalline composite materials for being loaded with porous carbon coating as positive pole, with a diameter of 10-
15mm circular metal lithium piece is negative pole, using by ethylene carbonate and diethyl carbonate mixing formed, containing concentration as 1mol/L
The mixed solution of lithium hexafluoro phosphate be electrolyte, using a diameter of 12-17mm circular polypropylene film as barrier film, in argon atmospher
Enclose and button half-cell is assembled into the glove box of protection；
(b3) charge-discharge performance test is carried out to the button half-cell.
7. application according to claim 6, it is characterised in that in the step (b1), the MnO of the porous carbon coating
The mass ratio of nanocrystalline composite material, acetylene black and Kynoar is 6-8:1-3:1-3.
8. application according to claim 6, it is characterised in that in the step (b2), the ethylene carbonate and carbon
The mass ratio of diethyl phthalate is 1:1.
9. application according to claim 6, it is characterised in that described to be loaded with porous carbon bag in the step (b2)
The diameter of the electrode slice of the MnO nanocrystalline composite materials covered is equal with the diameter of the circular metal lithium piece, and is less than the circle
The diameter of shape polypropylene film.
10. application according to claim 6, it is characterised in that in the step (b3), the charge-discharge performance test
Method is：By the button half-cell under 100mA/g current density, charge/discharge cycles 40-60 times, observe its electric discharge and hold
Measure situation of change；By the button half-cell under 1000mA/g current density, charge/discharge cycles 800-1000 times, observation
Its discharge capacity situation of change；By the button half-cell in 100mA/g, 200mA/g, 400mA/g, 800mA/g, 1000mA/g
Current density under, carry out charge/discharge cycles test.
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| CN112582619A (en) * | 2020-12-14 | 2021-03-30 | 安徽大学 | Preparation method, product and application of nitrogen and oxygen co-doped carbon nanofiber material |
| CN113346070A (en) * | 2021-08-05 | 2021-09-03 | 河南师范大学 | Preparation method of lantern-shaped metal-oxygen-carbon composite material and application of lantern-shaped metal-oxygen-carbon composite material in non-aqueous potassium ion battery |
| CN113571674A (en) * | 2021-09-22 | 2021-10-29 | 河南师范大学 | Preparation method and application of in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nano composite material |
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| CN114695861A (en) * | 2021-12-13 | 2022-07-01 | 安徽大学 | Preparation method of sulfur and nitrogen co-doped porous carbon material, prepared carbon material and application thereof |
| CN115331978A (en) * | 2022-09-02 | 2022-11-11 | 河北工业大学 | Preparation method and application of positive and negative electrode matching material of lithium ion hybrid capacitor |
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| CN108269983A (en) * | 2018-01-16 | 2018-07-10 | 合肥国轩高科动力能源有限公司 | A kind of carbon coating manganese oxide negative material and preparation method thereof |
| CN108269983B (en) * | 2018-01-16 | 2021-06-11 | 合肥国轩高科动力能源有限公司 | Carbon-coated manganese oxide negative electrode material and preparation method thereof |
| CN112239230A (en) * | 2020-10-15 | 2021-01-19 | 北京理工大学 | Hierarchical structure coating diaphragm for lithium-sulfur battery and preparation method thereof |
| CN112239230B (en) * | 2020-10-15 | 2021-09-28 | 北京理工大学 | Hierarchical structure coating diaphragm for lithium-sulfur battery and preparation method thereof |
| CN112582619A (en) * | 2020-12-14 | 2021-03-30 | 安徽大学 | Preparation method, product and application of nitrogen and oxygen co-doped carbon nanofiber material |
| CN113346070A (en) * | 2021-08-05 | 2021-09-03 | 河南师范大学 | Preparation method of lantern-shaped metal-oxygen-carbon composite material and application of lantern-shaped metal-oxygen-carbon composite material in non-aqueous potassium ion battery |
| CN113346070B (en) * | 2021-08-05 | 2021-11-09 | 河南师范大学 | Preparation method of lantern-shaped metal-oxygen-carbon composite material and application of lantern-shaped metal-oxygen-carbon composite material in non-aqueous potassium ion battery |
| CN113571674A (en) * | 2021-09-22 | 2021-10-29 | 河南师范大学 | Preparation method and application of in-situ carbon-coated binary transition metal oxide heterojunction bowl-shaped nano composite material |
| CN114695861A (en) * | 2021-12-13 | 2022-07-01 | 安徽大学 | Preparation method of sulfur and nitrogen co-doped porous carbon material, prepared carbon material and application thereof |
| CN114335471A (en) * | 2021-12-30 | 2022-04-12 | 石河子大学 | Preparation method of manganous oxide composite material for water-based zinc ion battery |
| CN115331978A (en) * | 2022-09-02 | 2022-11-11 | 河北工业大学 | Preparation method and application of positive and negative electrode matching material of lithium ion hybrid capacitor |
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