CN109817958A - A kind of hollow nanobelt of kalium ion battery negative electrode material C cladding Co-MOF, preparation method and application - Google Patents
A kind of hollow nanobelt of kalium ion battery negative electrode material C cladding Co-MOF, preparation method and application Download PDFInfo
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Abstract
A kind of kalium ion battery negative electrode material C provided by the invention coats the hollow nanobelt of Co-MOF, preparation method and application, the following steps are included: S1, the carbon-coated Co of presoma to be dissolved into ethyl alcohol and is ultrasonically treated obtaining solution E, the mass ratio of the carbon-coated Co of presoma and ethyl alcohol is (125~1250): 1；S2, it PVP is sufficiently dissolved into DMF obtains solution F, wherein the mass ratio of PVP and DMF is (500~1000): 1；S3, solution E is added in solution F be stirred at room temperature uniformly, obtain mixed solution G, wherein volume ratio 1:(0.5~1.5 of solution E and solution F)；S4, mixed solution G is carried out to spinning, the substance of collection is product H；S5, it takes product H to carry out carbonization treatment in argon atmosphere to obtain the hollow nanobelt of carbon-coated Co-MOF；Conductivity, cycle performance and the specific capacity of battery can be improved as the negative material of kalium ion battery for the hollow nanometer band structure for the carbon-coated Co-MoF that the present invention uses.
Description
Technical field
The invention belongs to secondary power battery material technical fields, and in particular to a kind of kalium ion battery negative electrode material C packet
Cover the preparation method and application of the hollow nanobelt of Co-MOF.
Background technique
Now, green and chargeable secondary cell, especially lithium ion battery (LIBs) in portable electronic and
It is widely applied in electric car, because their energy and power density are all very high.However, the scarcity of lithium and high cost are serious
Hinder the further development of the following LIBs.In recent years, kalium ion battery (KIBs) is just regaining more concerns, because of ground
Potassium resource abundant on ball.K+The oxidation-reduction potential of/K (- 2.93V vs.NHE) is close to redox Li+/Li(-
3.04V and NHE), it is lower than Na+/ Na (- 2.71V and NHE) makes KIBs have higher potentiality and safer use voltage.
Carbon material is applied to many chemistry and other field for a long time, including absorption, catalysis, energy storage and electronics are answered
With.Due to the importance of carbonaceous material, new innovative technology is worldwide continually developed.Therefore, in recent years, many porous
Carbonaceous material, have micropore or mesoporosity, or have hierarchical structure, it has also become the useful place of many application programs.?
Some technologies are applied to prepare kalium ion battery negative electrode material, including pyrolysis, chemical vapor deposition, arc discharge, hydrothermal solution carbon
MOFs structure after changing and synthesizing.High temperature pyrolysis is a kind of technology for preparing nano-pore carbon in recent years, because they are with higher
Thermal stability and chemical stability.In order to improve the performance of these carbonaceous materials, it is critically important for reaching uniform pore size
, therefore, the material used in pyrolytic process should select with caution.Therefore, metal organic frame (MOFs) is considered as
A kind of promising high-temperature material.
Summary of the invention
The purpose of the present invention is to provide a kind of hollow nanobelts of kalium ion battery negative electrode material C cladding Co-MOF, preparation
Method and application；The hollow nanometer band structure of carbon-coated Co-MoF prepared by the present invention can be with as the negative material of kalium ion battery
Improve conductivity, cycle performance and the specific capacity of battery.Metal organic frame can reduce K+Insertion and the resistance during abjection
Power, while metal Co can increase the electric conductivity of battery, the structure of hollow nanobelt alleviates the mistake of potassium ion insertion and abjection
Bring volume expansion in journey, to increase the specific capacity of battery；The structure feature of present invention combination Co-MOF and carbon nanobelts,
The hollow nanobelt of carbon-coated Co-MoF a kind of is prepared to improve the specific capacity and electric conductivity of kalium ion battery.
In order to achieve the above object, The technical solution adopted by the invention is as follows:
A kind of preparation method of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF provided by the invention, packet
Include following steps:
S1, the carbon-coated Co of presoma be dissolved into ethyl alcohol and is ultrasonically treated obtain solution E, the carbon-coated Co of presoma with
The mass ratio of ethyl alcohol is (125~1250): 1；
S2, it PVP is sufficiently dissolved into DMF obtains solution F, wherein the mass ratio of PVP and DMF is (500~1000): 1；
S3, solution E is added in solution F be stirred at room temperature uniformly, obtain mixed solution G, wherein solution E and solution
Volume ratio 1:(0.5~1.5 of F)；
S4, mixed solution G is carried out to spinning, the substance of collection is product H；
S5, it takes product H to carry out carbonization treatment in argon atmosphere to obtain the hollow nanobelt of carbon-coated Co-MOF.
Preferably, in S1, presoma it is carbon-coated Co's the preparation method is as follows:
Cobalt nitrate dissolution is obtained solution A by step 1 in methyl alcohol, wherein the mass ratio of cobalt nitrate and methanol is (12.5
~15): 1；
Methylimidazole is dissolved in solution A and obtains solution B by step 2, wherein the mass ratio of methylimidazole and cobalt nitrate
For 1:(0.88~2)；
B solution is stirred at room temperature uniformly step 3, obtains product C；
Product C is successively obtained presoma D after centrifuge separation, clear and drying by step 4；
Step 5 is made annealing treatment presoma D to obtain the carbon-coated Co of presoma in argon atmosphere.
Preferably, in S4, the technological parameter of centrifuge separation is (10000~15000) rpm；In cleaning, deionization is selected
Water and ethyl alcohol clean repeatedly.
Preferably, in S5, in argon atmosphere, 1~6h of annealing process conditions: is carried out at a temperature of 400~600 DEG C.
Preferably, in S9, the process conditions of spinning are: voltage 20KV, flow velocity are 45 μ L/min.
Preferably, in S10, the process conditions of carbonization treatment are: 1~6h of carbonization treatment at a temperature of 400~600 DEG C.
A kind of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF, based on preparation method preparation gained.
A kind of application of the kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF, by C cladding, Co-MOF is hollow receives
Negative electrode material of the rice band as kalium ion battery, is assembled into button cell.
Preferably, the specific method for assembling button cell is: cathode uses DMF for solvent, and the formula of pole piece is coated according to C
The hollow nanobelt of Co-MOF: PVDF: acetylene black=9-x:1:x mass ratio is modulated into slurry, is then evenly applied to slurry
It on copper foil, is put into vacuum oven and is dried, obtain experimental cell negative electrode tab by punching later, wherein 1≤x≤
2；
Using metallic potassium as to electrode；The solution of ethyl carbonate ester and dimethyl carbonate that electrolyte is KPF6 is according to 1:
1 volume ratio is mixed；Diaphragm is celgard2400 film；The sequence of assembled battery is followed successively by negative electrode casing, potassium piece, and diaphragm is born
Pole piece, gasket, spring leaf, anode cover are assembled into button cell in the glove box full of inert atmosphere.
Compared with prior art, the present invention at least has the advantages that
A kind of preparation method of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF provided by the invention, is adopted
The hollow nanobelt of C cladding Co-MOF is prepared with the method for electrostatic spinning, the simple process of synthesis is easy to operate and nontoxic.Synthesis
Co-MOF nano particle coated completely and occurred uniformly, the uniform diameter of nanobelt, and the ratio table of nanobelt by carbon nanobelts
Area is larger, sufficiently and electrolyte contacts can increase K+Transmission path, improve the performance of battery.Hollow structure can delay
Volume expansion of the electrode material in charge and discharge process is solved, while the electric conductivity of electrode can be improved after material carbonization.Carbon packet
The hollow nanometer band structure of the Co-MoF covered can be improved as the negative material of kalium ion battery the conductivity of battery, cycle performance and
Specific capacity.Metal organic frame can reduce K+Insertion and the resistance during abjection, while metal Co can increase battery
Electric conductivity, bring volume expansion during the structure of hollow nanobelt is alleviated potassium ion insertion and deviate from, to increase
The specific capacity of battery.
Further, sample is centrifuged out using biggish centrifugation rate, the mesh cleaned repeatedly using deionized water and ethyl alcohol
Be wash off extra inorganic salts and organic matter, improve the purity of product.
Further, convenient for product carbonization and the shape of Co-MOF is kept, shows hollow form.
Further, the synergistic effect between the voltage and rate of spinning can spin the nanobelt of even thickness.
Detailed description of the invention
The SEM figure that Fig. 1 is the Co-MOF being carbonized；
The SEM figure that Fig. 2 is the Co-MOF of C cladding；
Fig. 3 is charging and discharging curve of the Co-MOF of the C cladding of carbonization as kalium ion battery negative electrode material；
Specific embodiment
The present invention provides the preparation methods and application of a kind of kalium ion battery negative electrode material C cladding Co-MOF, using having
Machine object coats Co-MOF, and calcining forms the hollow nanobelt of carbon-coated Co-MOF under the atmosphere of argon gas.Utilize the hollow nanometer of carbon
Band uniformly provides biggish specific surface area and preferable electric conductivity, and is suitable for K+Pass through, the active material made is led
Electric rate, cycle performance and high rate performance are more preferably.
It please refers to shown in figure, a kind of preparation of the kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF of the present invention
Method, comprising the following steps:
Cobalt nitrate dissolution is obtained solution A, wherein the quality of cobalt nitrate and methanol by S1, under magnetic stirring in methyl alcohol
Than for (12.5~15): 1；
S2, under magnetic stirring, methylimidazole is dissolved in solution A and obtains solution B, the matter of methylimidazole and cobalt nitrate
Amount is than being 1:(0.88~2)；
S3, solution B is stirred at room temperature for 24 hours, obtains product C；
S4, product C is centrifugated by 10000~15000rpm, cleans 3 times repeatedly with deionized water and ethyl alcohol, 60
~80 DEG C, 12~for 24 hours dry after obtain presoma D；
S5, by presoma D, to obtain presoma carbon-coated by 1~6h of annealing 400~600 DEG C at a temperature of in argon atmosphere
Co；
S6, it takes the carbon-coated Co of presoma to be dissolved into ethyl alcohol and is ultrasonically treated 30~60min and obtain solution E, presoma
Carbon-coated Co and the mass ratio of ethyl alcohol are (125~1250): 1；
S7, it weighs PVP and is sufficiently dissolved into DMF and obtain solution F, wherein the mass ratio of PVP and DMF is (500~1000):
1；
S8, under magnetic stirring, is stirred at room temperature being added in solution F in solution E for 24 hours；Mixed solution G is obtained,
Wherein volume ratio 1:(0.5~1.5 of solution E and solution F)；
S9, the mixed solution G that 5mL is taken with the syringe of 5mL carry out spinning in the voltage of 20KV and the flow velocity of 45 μ L/min,
The substance of collection is H；
S10, taking product H, 1~6h of carbonization treatment obtains carbon-coated Co-MOF at 400~600 DEG C in argon atmosphere
Hollow nanobelt.
Preferably, the preferred carburizing temperature of presoma is 600 DEG C, annealing time 3h；The hollow nanobelt of Co-MOF moves back
Fiery temperature is 500 DEG C, annealing time 3h.
Kalium ion battery prepared by the present invention application of the hollow nanobelt of carbon-coated Co-MOF as negative electrode material, carbon
The hollow nanobelt of the Co-MOF of cladding is applied to button cell, and cathode uses DMF as the solvent for dissolving PVDF, and the formula of pole piece is pressed
Coat the hollow nanobelt of Co-MOF according to C: PVDF: the mass ratio of acetylene black=9-x:1:x (1≤x≤2) is modulated into slurry, then
Slurry is coated uniformly on copper foil, is put into after after 80 DEG C of baking 12h, being washed into the disk that diameter is 12mm in vacuum oven and obtains
Experimental cell pole piece；Using metallic potassium as to electrode, electrolyte is the ethyl carbonate ester and dimethyl carbonate of 1.0M KPF6
According to the solution that the volume ratio of 1:1 is mixed to get, diaphragm is celgard2400 film, in the glove box for being full of argon atmosphere
Inside it is assembled into button cell.
The sequence of assembled battery is followed successively by negative electrode casing, potassium piece, diaphragm, negative electrode tab, gasket, spring leaf, and anode cover is being full of
Button cell is assembled into the glove box of inert atmosphere.
Button cell charge and discharge blanking voltage is 0.01-2.6V, and charging or discharging current density is 50mA/g.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
The component for applying example can be arranged and be designed by a variety of different configurations.Therefore, below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of of the invention selected
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
(1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 20mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 582mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 10000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C of 12 baking
Presoma D is obtained after dry；
(5), the 1h that synthetic product D anneals at a temperature of 400 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 15mL ethyl alcohol and ultrasound 30min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 5mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 3mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 550 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
Embodiment 2
((1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 20mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 400mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 10000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C of 12-
Presoma D is obtained after drying for 24 hours；
(5), the 3h that synthetic product D anneals at a temperature of 300 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 15mL ethyl alcohol and ultrasound 45min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 5mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 3mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 500 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
Embodiment 3
(1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 25mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 256mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 10000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C of 12-
Presoma D is obtained after drying for 24 hours；
(5), the 6h that synthetic product D anneals at a temperature of 300 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 5mL ethyl alcohol and ultrasound 60min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 10mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 3mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 550 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
Embodiment 4
(1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 25mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 328mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 15000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C are dried for 24 hours
Presoma D is obtained after dry；
(5), the 1h that synthetic product D anneals at a temperature of 600 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 5mL ethyl alcohol and ultrasound 60min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 8mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 4mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 550 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
Embodiment 5
((1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 25mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 328mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 10000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C are dried for 24 hours
Presoma D is obtained after dry；
(5), the 3h that synthetic product D anneals at a temperature of 600 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 5mL ethyl alcohol and ultrasound 60min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 15mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 3mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 600 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
Embodiment 6
((1), under magnetic stirring, the cobalt nitrate of 291mg is dissolved in the methanol of 25mL and obtains solution A；
(2), under magnetic stirring, the methylimidazole of 328mg is dissolved in solution A and obtains solution B；
(3), B solution is stirred at room temperature for 24 hours, obtains product C；
(4), C solution is centrifugated by 15000rpm, is cleaned repeatedly 3 times with deionized water and ethyl alcohol, 60 DEG C are dried for 24 hours
Presoma D is obtained after dry；
(5), the 6h that synthetic product D anneals at a temperature of 600 DEG C in argon atmosphere obtains carbon-coated Co；
(6), it takes carbon-coated Co to be dissolved into 5mL ethyl alcohol and ultrasound 60min and obtains solution E；
(7), it weighs 0.8gPVP and is sufficiently dissolved into 10mL DMF and obtain solution F；
(8), it under magnetic stirring, will be added in solution F and be stirred at room temperature for 24 hours in solution E；
(9), the mixed solution G that 3mL is taken with syringe, carries out spinning under certain voltage and flow velocity, and the substance of collection is H；
(10), it takes product H annealing at 550 DEG C of 3h in argon atmosphere to obtain the hollow of carbon-coated Co-MOF to receive
Rice band.
By the implementation tested above, the pattern for the hollow nanobelt of carbon-coated Co-MOF that embodiment 6 obtains is found more
Uniformly, be conducive to the insertion and abjection of K+.It is the SEM figure for the Co-MOF being carbonized as shown in Figure 1, is the octahedra knot of ZiF-8
Structure, it can be seen from the figure that the 200-400nm uniform in size or so of Co-MOF, just enough linings are hollow to the Co-MOF after carbonization
Structure.
It is the SEM figure for the C@Co-MOF being carbonized as shown in Figure 2, the hollow nanobelt even thickness in figure, diameter exists
Between 200-300nm, being used as kalium ion battery negative electrode material has biggish specific surface area, biggish electric conductivity, hollow structure
Reduce potassium ion insertion and resistance when abjection.
Shown in Fig. 3, by the composite material of C@Co-MOF be assembled into kalium ion battery voltage be 0.01V-2.6V, electric current
The condition that density is 50mA/g carries out charge-discharge test, such as the 1st, 2,5,10,20 and 50 charging and discharging curve figure of figure.First
The specific capacity of secondary charge and discharge is that the efficiency of 648mAh/g and 774mAh/g charge and discharge is up to 83.7%, efficiency for charge-discharge for the first time
Not high may be because the electrolyte of a part is used to form SEI film.293mAh/g is still remain after 50 charge and discharge
Specific capacity.
Claims (9)
1. a kind of preparation method of the kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF, which is characterized in that including with
Lower step:
S1, the carbon-coated Co of presoma is dissolved into ethyl alcohol and be ultrasonically treated obtain solution E, the carbon-coated Co of presoma and ethyl alcohol
Mass ratio be (125~1250): 1；
S2, it PVP is sufficiently dissolved into DMF obtains solution F, wherein the mass ratio of PVP and DMF is (500~1000): 1；
S3, solution E is added in solution F and is stirred at room temperature uniformly, obtain mixed solution G, wherein solution E and solution F
Volume ratio 1:(0.5~1.5)；
S4, mixed solution G is carried out to spinning, the substance of collection is product H；
S5, it takes product H to carry out carbonization treatment in argon atmosphere to obtain the hollow nanobelt of carbon-coated Co-MOF.
2. a kind of preparation side of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 1
Method, which is characterized in that in S1, presoma it is carbon-coated Co's the preparation method is as follows:
Step 1, by cobalt nitrate dissolution obtain solution A in methyl alcohol, wherein the mass ratio of cobalt nitrate and methanol be (12.5~
15): 1；
Methylimidazole is dissolved in solution A and obtains solution B by step 2, wherein the mass ratio of methylimidazole and cobalt nitrate is 1:
(0.88~2)；
B solution is stirred at room temperature uniformly step 3, obtains product C；
Product C is successively obtained presoma D after centrifuge separation, clear and drying by step 4；
Step 5 is made annealing treatment presoma D to obtain the carbon-coated Co of presoma in an inert atmosphere.
3. a kind of preparation side of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 1
Method, which is characterized in that in S4, the technological parameter of centrifuge separation is (10000~15000) rpm；In cleaning, deionization is selected
Water and ethyl alcohol clean repeatedly.
4. a kind of preparation of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 1 or 2
Method, which is characterized in that in S5, in argon atmosphere, 1~6h of annealing process conditions: is carried out at a temperature of 400~600 DEG C.
5. a kind of preparation side of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 1
Method, which is characterized in that in S9, the process conditions of spinning are: voltage 20KV, flow velocity are 45 μ L/min.
6. a kind of preparation side of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 1
Method, which is characterized in that in S10, the process conditions of carbonization treatment are: 1~6h of carbonization treatment at a temperature of 400~600 DEG C.
7. a kind of kalium ion battery negative electrode material C coats the hollow nanobelt of Co-MOF, which is characterized in that be based on claim 1-6
Any one of described in preparation method prepare gained.
8. a kind of application of the kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF, which is characterized in that by claim
C described in 7 coats negative electrode material of the hollow nanobelt of Co-MOF as kalium ion battery, is assembled into button cell.
9. a kind of application of kalium ion battery negative electrode material C cladding hollow nanobelt of Co-MOF according to claim 8,
Be characterized in that, the specific method for assembling button cell is: cathode uses DMF for solvent, and the formula of pole piece coats Co-MOF according to C
Hollow nanobelt: PVDF: acetylene black=9-x:1:x mass ratio is modulated into slurry, and then slurry is evenly applied on copper foil,
It is put into vacuum oven and is dried, obtain experimental cell negative electrode tab by punching later, wherein 1≤x≤2；
Using metallic potassium as to electrode；The solution of ethyl carbonate ester and dimethyl carbonate that electrolyte is KPF6 is according to 1:1's
Volume ratio is mixed；Diaphragm is celgard2400 film；The sequence of assembled battery is followed successively by negative electrode casing, potassium piece, diaphragm, cathode
Piece, gasket, spring leaf, anode cover are assembled into button cell in the glove box full of inert atmosphere.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510282A (en) * | 2020-12-01 | 2021-03-16 | 北京理工大学前沿技术研究院 | Method for preparing MOF-based nano material based on waste lithium ion battery leachate |
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| CN113193193A (en) * | 2021-05-14 | 2021-07-30 | 河南大学 | Application of foam metal loaded transition metal matrix MOF material as battery negative electrode material |
| CN114540989A (en) * | 2022-01-12 | 2022-05-27 | 河北大学 | Preparation method and application of carbon fiber loaded bismuth sulfide material |
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| CN109817958B (en) | 2021-11-02 |
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