CN109755031B - NiO/NG/NF composite electrode material and preparation method thereof - Google Patents
NiO/NG/NF composite electrode material and preparation method thereof Download PDFInfo
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- 239000007772 electrode material Substances 0.000 title claims abstract description 49
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 172
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 85
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 60
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 57
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000243 solution Substances 0.000 claims abstract description 35
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229940078494 nickel acetate Drugs 0.000 claims abstract description 25
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000002791 soaking Methods 0.000 claims abstract description 17
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000019441 ethanol Nutrition 0.000 claims abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 238000001291 vacuum drying Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 239000010453 quartz Substances 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 32
- 238000005303 weighing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000006260 foam Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 abstract description 2
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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Classifications
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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
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a NiO/NG/NF composite electrode material and a preparation method thereof, wherein the NiO/NG/NF composite electrode material comprises the following steps: firstly, pretreating foamed nickel by using acetone and dilute hydrochloric acid, ultrasonically cleaning the treated foamed nickel by using deionized water and absolute ethyl alcohol respectively, soaking the pretreated foamed nickel into a mixed solution containing nickel acetate, phenanthroline, ethanol and glycol after vacuum drying, heating the mixed solution and a glycol solution of sodium hydroxide to 400-600 ℃ at a heating rate of 1-20 ℃/min in a tubular furnace under the condition of introducing nitrogen, and preserving heat for 1-12 hours to prepare the NiO/NG/NF composite electrode material through reaction. The electrode material has good specific capacitance and good cycling stability, and the specific capacitance retention rate of the electrode is 96% after the current density is 5A/g and the charge-discharge cycle is 2000 circles.
Description
Technical Field
The invention relates to a NiO/NG/NF composite electrode material and a preparation method thereof, in particular to a forest-shaped NiO/NG/NF composite electrode material with good charge-discharge performance and cycle stability and a preparation method thereof.
Background
The super capacitor has the characteristics of high power density, short charging time, long cycle life, low cost and the like, and is widely applied to the fields of portable electronic equipment, hybrid electric vehicles, large-scale smart power grids and the like. However, it is difficult to further achieve the theoretical specific capacitance due to the poor conductivity. In the traditional method, the adhesive, the conductive graphite and the active electrode material are added to be made into a paste electrode material and coated on the electrode, so that the performance of the active electrode material is difficult to fully exert. In order to solve the problem, the foamed nickel is used as an electrode current collector, so that the electrode material directly grows on a foamed nickel framework, and the performance of the electrode material can be greatly improved through the synergistic effect.
NiO has the characteristics of large theoretical specific capacitance, low price, rich raw materials, environmental friendliness and the like, and is concerned by researchers. However, the electron conductivity of NiO is relatively low, and therefore the actual specific capacitance is low. The graphene has the advantages of large specific surface area, ultrahigh carrier mobility, good chemical stability and the like. In order to improve the conductivity of the NiO composite electrode material, graphene is generally compounded with a semiconductor material, but graphene is often synthesized in advance and then compounded with other semiconductor materials, so that the graphene is difficult to uniformly disperse, the interface bonding effect with an inorganic material is poor, excellent electrical properties of the inorganic material are difficult to fully exert, the preparation process and the post-treatment process of the NiO composite electrode material are complicated and complex, the preparation conditions are harsh, and the NiO composite electrode material is not favorable for wide application in commerce. On the other hand, the prepared super capacitor has high specific surface area and can provide more electroactive sites in the electrochemical reaction process, so that the capacitance performance of the super capacitor can be enhanced.
Based on the reasons, the main problem to be solved by the invention is how to find a NiO/NG/NF composite electrode material which has relatively simple process, mild reaction conditions, high specific surface area and high conductivity, and has good charge-discharge performance and cycle stability.
The invention content is as follows:
the invention aims to provide a preparation method of a NiO/NG/NF composite electrode material. The preparation process is relatively simple, the obtained porous reticular composite structure is beneficial to the transmission of electrons and electrolyte ions in the electrochemical process, so that the electrochemical energy storage reaction is facilitated, the electrochemical performance of the electrode material can be effectively improved, forest-shaped NiO and graphene are directly grown on a foam nickel framework by using foam nickel as a substrate, the obtained NiO has good oxidation-reduction property, the graphene and Ni can improve the conductivity, the problems of poor electrode cycle stability, high internal resistance and the like are effectively avoided, the three are compounded, and the prepared porous electrode material has higher specific capacitance and good cyclicity.
In order to solve the technical problems, the invention adopts the following technical scheme:
a NiO/NG/NF composite electrode material and its preparation method, wherein the NiO/NG/NF composite electrode material of the forest shape is to soak the foam nickel pretreated into the mixed solution containing nickel acetate, phenanthroline, ethanol and ethanediol, react with ethanediol solution of sodium hydroxide to get NiO/NG/NF multi-stage network structure composite electrode material, the said composite material can be used as the electrode material of the super capacitor, the said method includes the following steps:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(2) weighing 0.01-1mmol of nickel acetate, and dissolving in 0.1-5ml of ethylene glycol to obtain a solution a;
(3) weighing 0.001-0.1g of phenanthroline, dissolving in 0.1-5ml of ethanol, and marking as solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) putting 0.01-0.5g of sodium hydroxide and 1-5ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 1: 1-1: 20, putting the two quartz boats ① and ② into a tubular furnace in sequence, introducing nitrogen, heating to 400-600 ℃ at the heating rate of 1-20 ℃/min, preserving the temperature for 1-12h, and cooling to obtain the NiO/NG/NF composite electrode material.
Drawings
FIG. 1 is an X-ray powder diffraction (XRD) pattern of a NiO/NG/NF composite electrode material prepared by the method in the first embodiment of the invention.
FIG. 2 is a Scanning Electron Microscope (SEM) photograph of a NiO/NG/NF composite electrode material prepared by the method of the first embodiment of the invention.
FIG. 3 shows the charge and discharge performance test results of the NiO/NG/NF composite electrode material prepared by the method of the invention.
FIG. 4 shows the cycle stability test results of the NiO/NG/NF composite electrode material prepared by the method of the first embodiment of the invention.
Detailed Description
The first embodiment is as follows:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(2) weighing 0.3mmol of nickel acetate, and dissolving the nickel acetate in 2ml of ethylene glycol to obtain a solution a;
(3) weighing 0.007g of phenanthroline, dissolving in 1ml of ethanol, and marking as a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.1g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 3:25, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 500 ℃ at the heating rate of 5 ℃/min, preserving the temperature for 4 hours, and cooling to obtain the NiO/NG/NF composite electrode material.
Example two:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(2) weighing 0.6mmol of nickel acetate, and dissolving the nickel acetate in 1ml of ethylene glycol to obtain a solution a;
(3) weighing 0.014g of phenanthroline, and dissolving in 1ml of ethanol to obtain a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.1g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 6:25, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 500 ℃ at the heating rate of 5 ℃/min, preserving the temperature for 4 hours, and cooling to obtain the NiO/NG/NF composite electrode material.
Example three:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(4) weighing 0.15mmol of nickel acetate, and dissolving the nickel acetate in 1ml of ethylene glycol to obtain a solution a;
(3) weighing 0.007g of phenanthroline, dissolving in 1ml of ethanol, and marking as a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.1g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 3:50, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 550 ℃ at the heating rate of 5 ℃/min, preserving the temperature for 4 hours, and cooling to obtain the NiO/NG/NF composite electrode material.
Example four:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(5) weighing 0.3mmol of nickel acetate, and dissolving the nickel acetate in 2ml of ethylene glycol to obtain a solution a;
(3) weighing 0.007g of phenanthroline, dissolving in 2ml of ethanol, and marking as a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.2g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 3:50, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 550 ℃ at the heating rate of 10 ℃/min, preserving the temperature for 4 hours, and cooling to obtain the NiO/NG/NF composite electrode material.
Example five:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(6) weighing 0.3mmol of nickel acetate, and dissolving the nickel acetate in 3ml of ethylene glycol to obtain a solution a;
(3) weighing 0.1g of phenanthroline, and dissolving in 2ml of ethanol to obtain a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.1g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 3:25, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 450 ℃ at the heating rate of 2 ℃/min, preserving the temperature for 6h, and cooling to obtain the NiO/NG/NF composite electrode material.
Example six:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(2) weighing 0.3mmol of nickel acetate, and dissolving the nickel acetate in 5ml of ethylene glycol to obtain a solution a;
(3) weighing 0.007g of phenanthroline, dissolving in 5ml of ethanol, and marking as a solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) and (2) putting 0.2g of sodium hydroxide and 2ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 3:25, putting the two quartz boats ① and ② into a tube furnace in sequence, introducing nitrogen, heating to 650 ℃ at the heating rate of 2 ℃/min, preserving the temperature for 3h, and cooling to obtain the NiO/NG/NF composite electrode material.
FIG. 1 is an X-ray powder diffraction (XRD) pattern of a NiO/NG/NF composite electrode material prepared by the method in the first embodiment of the invention. The sharp diffraction peak (labeled #) in the figure comes from metallic nickel, and the weak diffraction peak (labeled x) corresponds to the diffraction peak of NiO;
FIG. 2 is a Scanning Electron Microscope (SEM) photograph of a NiO/NG/NF composite electrode material prepared by the method of the first embodiment of the invention. As can be seen from FIG. 2a, NiO/NG grows uniformly on the foamed nickel with the three-dimensional network structure, and as can be seen from FIG. 2b, the obtained composite structure is in a forest shape assembled by nano thorns, and the structure increases the effective area of the electrode material and is beneficial to the effective transmission of electrolyte;
FIG. 3 shows the result of the measurement of the charge/discharge performance of the NiO/NG/NF composite electrode material prepared by the method of the first embodiment of the invention. As can be seen from the graphs (3a, 3b), when the current densities of NiO/NG/NF as the electrode material are 1A/g, 2A/g, 5A/g and 10A/g, the specific capacitances are 1525F/g,1458F/g,1389F/g,1289F/g and 1156F/g respectively. The NiO, the nitrogen-doped graphene and the foam nickel are compounded, so that the prepared electrode material with the multilevel network structure has high specific capacitance;
FIG. 4 shows the cycle stability test results of the NiO/NG/NF composite electrode material prepared by the method of the first embodiment of the invention. As can be seen from fig. 4, the specific capacity retention of the electrode after 2000 cycles of charge-discharge cycles at a current density of 5A/g was 96%. The NiO, the nitrogen-doped graphene and the foam nickel are compounded, so that the prepared electrode material with the multilevel network structure has good cycling stability.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments.
Claims (1)
1. A NiO/NG/NF composite electrode material and a preparation method thereof are characterized in that the NiO/nitrogen-doped graphene (NG)/foamed Nickel (NF) composite electrode material is prepared by immersing pretreated foamed nickel into a mixed solution containing nickel acetate, phenanthroline, ethanol and ethylene glycol, and reacting with an ethylene glycol solution of sodium hydroxide to obtain the NiO/NG/NF multi-stage mesh structure composite electrode material, wherein the composite electrode material can be used as an electrode material of a super capacitor, and the method comprises the following steps:
(1) foam nickel pretreatment: cutting foamed nickel into square pieces with the size of 1cm multiplied by 1cm, soaking the foamed nickel in acetone for 5min, taking out the foamed nickel, soaking the foamed nickel in 1mol/L diluted hydrochloric acid for 5min, finally taking out the foamed nickel, respectively ultrasonically washing the foamed nickel for three times by deionized water and absolute ethyl alcohol, and drying the foamed nickel in a vacuum drying oven at the temperature of 60 ℃;
(2) weighing 0.01-1mmol of nickel acetate, and dissolving in 0.1-5ml of ethylene glycol to obtain a solution a;
(3) weighing 0.001-0.1g of phenanthroline, dissolving in 0.1-5ml of ethanol, and marking as solution b;
(4) pouring the prepared solution a into the solution b, uniformly mixing, putting into a quartz boat ①, and putting the foamed nickel pretreated in the step (1) into a quartz boat ①;
(5) putting 0.01-0.5g of sodium hydroxide and 1-5ml of ethylene glycol into another quartz boat ② to ensure that the molar ratio of the nickel acetate to the sodium hydroxide is 1: 1-1: 20, putting the two quartz boats ① and ② into a tubular furnace in sequence, introducing nitrogen, heating to 400-600 ℃ at the heating rate of 1-20 ℃/min, preserving the temperature for 1-12h, and cooling to obtain the NiO/NG/NF composite electrode material.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681003A (en) * | 2013-11-25 | 2014-03-26 | 北京工业大学 | Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials |
| CN105152167A (en) * | 2015-10-16 | 2015-12-16 | 合肥工业大学 | Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate |
| KR20180133063A (en) * | 2017-06-05 | 2018-12-13 | 주식회사 엘지화학 | Catalytic site, positive electrode active material and lithium-sulfur battery comprising the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681003A (en) * | 2013-11-25 | 2014-03-26 | 北京工业大学 | Method for manufacturing substrates of three-dimensional graphene-nickel oxide composite materials |
| CN105152167A (en) * | 2015-10-16 | 2015-12-16 | 合肥工业大学 | Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate |
| KR20180133063A (en) * | 2017-06-05 | 2018-12-13 | 주식회사 엘지화학 | Catalytic site, positive electrode active material and lithium-sulfur battery comprising the same |
Non-Patent Citations (3)
| Title |
|---|
| "Ni(OH)2 and NiO Nanostructures: Synthesis, Characterization and Electrochemical Performance";Lotf Ali Saghatforoush,et al;《Bull. Korean Chem. Soc.》;20120820;第33卷(第8期);第2613-2618页 * |
| "Nitrogen-doped graphene-activated metallic nanoparticle-incorporated ordered mesoporous carbon nanocomposites for the hydrogenation of nitroarenes";Haigen Huang,et al;《RSC Adv.》;20180226;第8卷;第8898-8909页 * |
| "Self-assembled Ni/NiO/RGO heterostructures for high-performance supercapacitors";Yachao Zhu,et al;《RSC Adv.》;20150910;第5卷;第77958-77964页 * |
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