CN109786728B - NbOPO4 nanosheet/rGO composite material and preparation method and application thereof - Google Patents
NbOPO4 nanosheet/rGO composite material and preparation method and application thereof Download PDFInfo
- Publication number
- CN109786728B CN109786728B CN201811648820.6A CN201811648820A CN109786728B CN 109786728 B CN109786728 B CN 109786728B CN 201811648820 A CN201811648820 A CN 201811648820A CN 109786728 B CN109786728 B CN 109786728B
- Authority
- CN
- China
- Prior art keywords
- nbopo
- composite material
- nano
- nanosheet
- rgo composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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 relates to NbOPO4The nano-sheet/rGO composite material can be used as a negative active material of a lithium ion battery to be applied to electrochemical energy storage, and takes graphene as a substrate and NbOPO4The nano-sheets are closely and uniformly dispersed on the graphene sheets, the NbOPO4The thickness of the flaky structure of the nano-sheet/rGO composite material is 30-50nm, wherein NbOPO4The size of the nanosheet is-1 μm. The invention has the beneficial effects that: the invention constructs NbOPO4The nano-sheet/rGO composite material can effectively improve NbOPO4The nano sheet is agglomerated, and the conductivity of the material is improved. Mixing NbOPO4The nanosheet/rGO composite material shows excellent cycling stability when applied to a lithium ion battery cathode material, and has good rate performance under high current density.
Description
Technical Field
The invention belongs to the technical field of nano materials and electrochemical energy storage, and particularly relates to NbOPO4The nanosheet/rGO composite material and the preparation method thereof can be used as a lithium ion battery cathode active material to be applied to electrochemical energy storage.
Background
The development of the lithium ion battery technology provides a new solution for the problems of energy crisis and environmental pollution caused by the traditional fossil fuel, and provides a new strategy for developing clean energy. Although lithium ion batteries have been widely used as energy storage devices, such as portable computers, smart phones, electric vehicles, etc., the graphite material for the negative electrode of the commercial lithium ion batteries has a lower theoretical capacity (372mAh g)-1) And the long-term application of the energy storage material in the field of large-scale energy storage is restricted. In recent years, researchers have found that by adopting a nano-technology to construct an electrode material with a nano-structure, lithium ions can be absorbed and released more rapidly and sufficiently than a bulk micron-sized electrode material, sufficient reaction of active substances is promoted, and energy density and power density are improved. Therefore, researchers have effectively constructed a plurality of nano materials and nano structures as electrode materials of lithium ion batteries, and the nano materials and the nano structures have more excellent electrochemical performance than bulk materialsChemical properties.
Research shows that MOPO4(M ═ V, Nb, Mo, Ti) compounds having an open two-or three-dimensional structure suitable for lithium ion deintercalation, and polyanions PO43-The lithium ion battery cathode active material has strong electronegativity, can provide a stable 3D frame structure for lithium ion de-intercalation, relieves the irreversible change of material volume in the charge and discharge process, and is a lithium ion battery cathode active material with application potential. However, currently, NbOPO is concerned4The preparation method of the nanosheet structure and the application of the nanosheet structure in a lithium ion battery are not reported.
Disclosure of Invention
The invention provides NbOPO aiming at the prior technical problems4The nano-sheet/rGO composite material and the preparation method thereof have simple process, meet the green chemical requirements and obtain NbOPO4The nanosheet/rGO composite material is used as a negative electrode active material of the lithium ion battery, and has excellent cycle performance and rate capability.
The technical scheme adopted by the invention aiming at the technical problems is as follows: NbOPO4nanosheet/rGO composite material based on graphene, NbOPO4The nano-sheets are closely and uniformly dispersed on the graphene sheets, the NbOPO4The thickness of the flaky structure of the nano-sheet/rGO composite material is 30-50nm, wherein NbOPO4The size of the nanosheet is-1 μm.
The NbOPO4The preparation method of the nanosheet/rGO composite material comprises the following steps:
1) weighing niobium salt, dissolving the niobium salt in an organic solvent, stirring, adding a phosphoric acid solution, and continuously stirring uniformly;
2) adding the graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and uniformly stirring;
3) transferring the mixed solution obtained in the step 2) into a reaction container, heating, taking out, and naturally cooling to room temperature;
4) washing the precipitate obtained in the step 3), and freeze-drying;
5) calcining the dried product obtained in the step 4) to obtain NbOPO4nanosheet/rGO composites.
According to the scheme, the organic solvent is 25-30mL, the graphene dispersion liquid is 5-10mL, the concentration of phosphoric acid is 85 wt.%, the using amount is 1-2mL, and the niobium salt is 0.1-0.2 g.
According to the scheme, the niobium salt is NbCl5And the organic solvent is ethanol solution.
According to the scheme, the heating temperature in the step 3) is 100-140 ℃, and the heat preservation time is 15-20 h.
According to the scheme, the washing in the step 4) is three times of washing by deionized water.
According to the scheme, the calcining atmosphere in the step 5) is argon, the temperature is 700-850 ℃, and the heating rate is 2-5 ℃ for min-1The heat preservation time is 2-4 h.
The NbOPO4The nanosheet/rGO composite material is applied as a negative electrode active material of a lithium ion battery.
The invention adopts a hydrothermal-calcination two-step method, and by introducing a graphene substrate, NbOPO4The nano-sheet precursor is uniformly dispersed and grows on the graphene sheet in situ, the self-agglomeration of the nano-sheet is avoided, and NbOPO obtained after calcination4The nanosheet/rGO composite material structure effectively shortens the ion/electron transmission distance, and simultaneously, the graphene not only can relieve the volume change in the charging and discharging process, but also is beneficial to improving the electron conductivity. Thus, NbOPO4The nanosheet/rGO composite material has good cycle performance and rate capability as a lithium ion battery cathode active material, and is a lithium ion battery cathode active material with development potential.
The invention has the beneficial effects that: the invention constructs NbOPO4The nano-sheet/rGO composite material can effectively improve NbOPO4The nano sheet is agglomerated, and the conductivity of the material is improved. Mixing NbOPO4The nanosheet/rGO composite material shows excellent cycling stability when applied to a lithium ion battery cathode material, and has good rate performance under high current density. The test results showed that the temperature was 0.5A g-1The initial specific discharge capacity under the current density is 588.6mAh g-1After 800 cycles, the specific discharge capacity is 503.1mAh g-1The circulation retention rate is 85 percent, and the multiplying power is tested to be 8.0A g-1The discharge specific capacity under the heavy current density still has 308.4mAh g-1. The method is simple, has strong feasibility and large-scale production capacity, and provides a potential candidate for selection of the lithium ion battery cathode active material.
Drawings
FIG. 1 shows NbOPO in example 1 of the present invention4A synthesis mechanism diagram of the nano-sheet/rGO composite material;
FIG. 2 shows NbOPO in example 1 of the present invention4XRD pattern of nanosheet/rGO composite;
FIG. 3 shows NbOPO in example 1 of the present invention4SEM (scanning electron microscope) picture of the nano sheet/rGO composite material (wherein a picture is SEM picture of a product obtained by hydrothermal reaction, and b is SEM picture of calcining the product obtained by hydrothermal reaction at 800 ℃ for 2 h);
FIG. 4 shows NbOPO in example 1 of the present invention4A nanosheet/rGO composite raman spectrum;
FIG. 5 shows NbOPO in example 1 of the present invention4TEM images of the nanosheet/rGO composite;
FIG. 6 shows NbOPO in example 1 of the present invention4nanosheet/rGO composites at 0.5A g-1A battery cycle performance plot at current density;
FIG. 7 shows NbOPO in example 1 of the present invention4The nano-sheet/rGO composite material is 0.1,0.2,0.5,1.0,2.0,5.0,8.0A g-1Current density lower rate performance plot.
Detailed description of the preferred embodiments
For a better understanding of the present invention, the following examples are set forth to illustrate, but are not to be construed as the limit of the present invention.
Example 1:
NbOPO4the preparation method of the nanosheet/rGO composite material comprises the following steps:
the preparation method of the graphene dispersion liquid by the Hummers method comprises the following steps:
1) 1g of graphite powder with the granularity of 325 meshes and 23mL of concentrated sulfuric acid are mixed in a 250mL conical flask and stirred for 24 hours at room temperature;
2) under the condition of water bath at 40 ℃, the step1) Adding 100mg NaNO3Stirring for 5min to make NaNO3Fully dissolving;
3) slowly adding 500mg KMnO to the step 2)4(the reaction temperature is controlled below 45 ℃), and stirring is continued for 30 min;
4) adding 3mL of distilled water into the step 3), adding 3mL of distilled water again after 5min, adding 40mL of distilled water after 5min, and continuing stirring for 15 min;
5) 140mL of distilled water and 10mL of H were added to step 4)2O2(30 wt.%), stirring at room temperature for 5min, terminating the reaction;
6) washing the precipitate obtained in the step 5) by using an HCI (5 wt.%) solution twice by using a high-speed centrifuge at 10000 r/min for 3min, and then continuously washing the precipitate to be neutral by using distilled water;
7) dispersing the precipitate obtained in the step 6) in a conical flask filled with 100mL of distilled water, and carrying out ultrasonic treatment at the frequency of 90Hz for 60 min;
8) centrifuging the solution obtained in the step 7) by using a high-speed centrifuge at the rotating speed of 5000 r/min for 5min, taking the supernatant, continuing to rotate at 5000 r/min, centrifuging for 5min twice to obtain a graphene dispersion liquid with the concentration of 5mg mL-1。
2.NbOPO4The preparation method of the nanosheet/rGO composite material comprises the following steps:
1) 0.1g of NbCl was weighed5Dissolving in 30mL of ethanol solution, stirring to obtain a clear and transparent solution, adding 1mL of phosphoric acid (85 wt.%), and continuing stirring for 10 min;
2) adding 7.5mL of graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and continuously stirring for 10 min;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, placing the polytetrafluoroethylene reaction kettle in a drying oven at the temperature of 110 ℃ for 16 hours, taking out the polytetrafluoroethylene reaction kettle, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature;
4) washing the precipitate obtained in the step 3) with deionized water for three times, and then freeze-drying;
5) introducing argon into the dried product obtained in the step 4) in a tubular furnace for calcination, wherein the calcination temperature is 800 ℃, and the heating rate is 5 ℃ for min-1Keeping the temperature for 2 hours to obtainNbOPO4nanosheet/rGO composites.
With NbOPO in this example4The nano sheet/rGO composite material is taken as an example, the synthetic technical route of the invention is shown as figure 1, and NbOPO is generated in the hydrothermal process4The nanosheet precursor uniformly grows on the graphene sheet, and then is calcined to obtain NbOPO4nanosheet/rGO composites. The X-ray diffraction pattern (XRD) in FIG. 2 shows that NbOPO4Diffraction peaks of various crystal faces and NbOPO in nanosheet/rGO composite material4The standard card diffraction peaks match well (JCPDS card number: 70-2468). As shown in FIG. 3, FIG. 3a shows NbOPO after hydrothermal treatment4The nano-sheet precursor is uniformly dispersed on the graphene sheet, and is calcined at 800 ℃ in argon atmosphere to obtain NbOPO4The nanosheets remaining well adhered to the graphene sheet, NbOPO4The thickness of the nano-sheet/rGO composite material is 30-50nm, wherein NbOPO4The size of the nanosheet is-1 μm. While FIG. 4 Raman test ID/IG0.987, indicating that the calcined graphene is partially reduced, increasing the conductivity of the material as a whole. FIGS. 5a, b high power Transmission Electron Microscope (TEM) in which 0.45nm and 0.32nm lattice fringes correspond to NbOPO4The (110) and (200) crystal planes of (a) and (b), and the selected electron diffraction (SAED) in fig. 5c shows the polycrystallinity of the material.
NbOPO prepared by subjecting this example to4The nano-sheet/rGO composite material is used as a lithium ion battery cathode active material, and is mixed with acetylene black and a binder according to the weight ratio of 7: 2: 1 proportion is made into slurry which is evenly coated on copper foil, and the slurry is punched into an electrode slice with the diameter of 1cm by a sheet punching machine, and LiPF is used6The saline solution is electrolyte, and the button type lithium ion half-cell is assembled to test the electrochemical performance, wherein the test voltage interval is 0.01-3.0V. As shown in FIG. 6, at 0.5Ag-1The initial specific discharge capacity under the current density is 588.6mAh g-1After 800 cycles, the specific discharge capacity is 503.1mAh g-1The cycle retention rate was 85%, and excellent cycle stability was exhibited. The rate capability test in fig. 7 shows that the rate test is from 0.1A g-1To 8.0A g-1The discharge specific capacity under the heavy current density still has 308.4mAh g-1Is at first0.1A g original-1The discharge specific capacity is 52.3% of the discharge specific capacity under the current density, and the discharge specific capacity has better rate capability.
Example 2
NbOPO4The preparation method of the nanosheet/rGO composite material comprises the following steps:
the preparation method of the graphene dispersion liquid by the Hummers method comprises the following steps: same as example 1;
2.NbOPO4the preparation method of the nanosheet/rGO composite material comprises the following steps:
1) 0.1g of NbCl was weighed5Dissolving in 30mL of ethanol solution, stirring to obtain a clear and transparent solution, adding 1mL of phosphoric acid (85 wt.%), and continuing stirring for 10 min;
2) adding 8mL of graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and continuously stirring for 10 min;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, placing the polytetrafluoroethylene reaction kettle in a 120 ℃ drying oven for 14 hours, taking out the polytetrafluoroethylene reaction kettle, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature;
4) washing the precipitate obtained in the step 3) with deionized water for three times, and then freeze-drying;
5) introducing argon into the dried product obtained in the step 4) in a tubular furnace for calcination, wherein the calcination temperature is 800 ℃, and the heating rate is 5 ℃ for min-1Keeping the temperature for 2h to obtain NbOPO4nanosheet/rGO composites.
NbOPO obtained in this example4nanosheet/rGO composite for example, assembled lithium ion half cell tested electrochemical performance similar to example 1 at 0.5A g-1The initial specific discharge capacity under the current density of the lithium ion battery is 590.1mAh g-1The specific discharge capacity after 800 cycles is 500.0mAh g-1The cycle retention rate was 85%, and excellent cycle stability was exhibited. The rate capability test shows that the rate test is from 0.1A g-1To 8.0A g-1The discharge specific capacity under the heavy current density is still 320.6mAh g-1Is initially 0.1A g-1The discharge specific capacity is 55.6% of the discharge specific capacity under the current density, and the discharge specific capacity has better rate capability.
Example 3
NbOPO4Nanosheet/rGO compositeThe preparation method of the material comprises the following steps:
the preparation method of the graphene dispersion liquid by the Hummers method comprises the following steps: same as example 1;
2.NbOPO4the preparation method of the nanosheet/rGO composite material comprises the following steps:
1) 0.2g of NbCl was weighed5Dissolving in 30mL of ethanol solution, stirring to obtain a clear and transparent solution, adding 1.5mL of phosphoric acid (85 wt.%) solution, and continuing stirring for 10 min;
2) adding 9mL of graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and continuing stirring for 10 min;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, placing the polytetrafluoroethylene reaction kettle in a 120 ℃ drying oven for 18 hours, taking out the polytetrafluoroethylene reaction kettle, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature;
4) washing the precipitate obtained in the step 3) with deionized water for three times, and then freeze-drying;
5) introducing argon into the dried product obtained in the step 4) in a tubular furnace for calcination, wherein the calcination temperature is 750 ℃, and the heating rate is 4 ℃ for min-1Keeping the temperature for 3h to obtain NbOPO4nanosheet/rGO composites.
NbOPO obtained in this example4nanosheet/rGO composites are exemplified and the electrochemical performance of the assembled lithium ion half cell test is similar to that of example 1. At 0.5A g-1The initial specific discharge capacity under the current density of the lithium ion battery is 580.3mAh g-1The specific discharge capacity after 800 cycles is 505.4mAh g-1The cycle retention rate was 87%, and excellent cycle stability was exhibited. The rate capability test shows that the rate test is from 0.1A g-1To 8.0A g-1The discharge specific capacity under the heavy current density still has 310.1mAh g-1Is initially 0.1A g-1The discharge specific capacity is 54.5% of the discharge specific capacity under the current density, and the discharge specific capacity has better rate capability.
Example 4
NbOPO4The preparation method of the nanosheet/rGO composite material comprises the following steps:
the preparation method of the graphene dispersion liquid by the Hummers method comprises the following steps: same as example 1;
2.NbOPO4Nanosheet/rGO compositeThe preparation method comprises the following steps:
1) 0.15g of NbCl was weighed5Dissolving in 30mL of ethanol solution, stirring to obtain a clear and transparent solution, adding 1.2mL of phosphoric acid (85 wt.%) solution, and continuing stirring for 10 min;
2) adding 8.5mL of graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and continuously stirring for 10 min;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, placing the polytetrafluoroethylene reaction kettle in a 130 ℃ drying oven for 16 hours, taking out the polytetrafluoroethylene reaction kettle, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature;
4) washing the precipitate obtained in the step 3) with deionized water for three times, and then freeze-drying;
5) introducing argon into the dried product obtained in the step 4) in a tubular furnace for calcination, wherein the calcination temperature is 800 ℃, and the heating rate is 5 ℃ for min-1Keeping the temperature for 2h to obtain NbOPO4nanosheet/rGO composites.
NbOPO obtained in this example4nanosheet/rGO composites are exemplified and the electrochemical performance of the assembled lithium ion half cell test is similar to that of example 1. At 0.5A g-1The initial specific discharge capacity under the current density of the lithium ion battery is 585.8mAh g-1The specific discharge capacity after 800 cycles is 493.6mAh g-1The cycle retention rate was 84%, and excellent cycle stability was exhibited. The rate capability test shows that the rate test is from 0.1A g-1To 8.0A g-1The discharge specific capacity under the heavy current density is still 305.0mAh g-1Is initially 0.1A g-1The discharge specific capacity is 51.3% of the discharge specific capacity under the current density, and the discharge specific capacity has better rate capability.
Example 5
NbOPO4The preparation method of the nanosheet/rGO composite material comprises the following steps:
the preparation method of the graphene dispersion liquid by the Hummers method comprises the following steps: same as example 1;
2.NbOPO4the preparation method of the nanosheet/rGO composite material comprises the following steps:
1) 0.15g of NbCl was weighed5Dissolving in 30mL of ethanol solution, stirring to obtain a clear and transparent solution, adding 1.2mL of phosphoric acid (85 wt.%) solution, and continuing stirring for 10 min;
2) adding 8.5mL of graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and continuously stirring for 10 min;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, placing the polytetrafluoroethylene reaction kettle in a drying oven at the temperature of 110 ℃ for 20 hours, taking out the polytetrafluoroethylene reaction kettle, and naturally cooling the polytetrafluoroethylene reaction kettle to room temperature;
4) washing the precipitate obtained in the step 3) with deionized water for three times, and then freeze-drying;
5) introducing argon into the dried product obtained in the step 4) in a tubular furnace for calcination, wherein the calcination temperature is 850 ℃, and the heating rate is 3 ℃ for min-1Keeping the temperature for 2h to obtain NbOPO4nanosheet/rGO composites.
NbOPO obtained in this example4nanosheet/rGO composites are exemplified and the electrochemical performance of the assembled lithium ion half cell test is similar to that of example 1. At 0.5A g-1The initial specific discharge capacity under the current density of the lithium ion battery is 575.5mAh g-1The specific discharge capacity after 800 cycles is 498.0mAh g-1The cycle retention rate was 86%, and excellent cycle stability was exhibited. The rate capability test shows that the rate test is from 0.1A g-1To 8.0A g-1The specific discharge capacity under the heavy current density is still 300.5mAh g-1Is initially 0.1A g-1The discharge specific capacity is 50.6% of the discharge specific capacity under the current density, and the discharge specific capacity has better rate capability.
Claims (4)
1.NbOPO4Preparation method of nano-sheet/rGO composite material, NbOPO4nanosheet/rGO composite material based on graphene, NbOPO4The nano-sheets are closely and uniformly dispersed on the graphene sheets, the NbOPO4The thickness of the flaky structure of the nano-sheet/rGO composite material is 30-50nm, wherein NbOPO4The size of the nano sheet is 1 mu m, and the method comprises the following steps:
1) weighing niobium salt, dissolving the niobium salt in an organic solvent, stirring, adding a phosphoric acid solution, and continuously stirring uniformly;
2) adding the graphene dispersion liquid prepared by a Hummers method into the solution obtained in the step 1), and uniformly stirring;
3) transferring the mixed solution obtained in the step 2) into a polytetrafluoroethylene reaction kettle, heating, taking out, and naturally cooling to room temperature; the heating temperature is 100-;
4) washing the precipitate obtained in the step 3), and freeze-drying;
5) calcining the dried product obtained in the step 4), wherein the calcining atmosphere is argon, the temperature is 700-850 ℃, and the heating rate is 2-5 ℃ for min-1Keeping the temperature for 2-4 h; obtaining NbOPO4nanosheet/rGO composites.
2. NbOPO according to claim 14The preparation method of the nanosheet/rGO composite material is characterized in that 25-30mL of organic solvent, 5-10mL of graphene dispersion liquid, 85 wt.% of phosphoric acid, 1-2mL of dosage and 0.1-0.2g of niobium salt are used.
3. NbOPO according to claim 14The preparation method of the nano-sheet/rGO composite material is characterized in that the niobium salt is NbCl5And the organic solvent is ethanol solution.
4. NbOPO according to claim 14The preparation method of the nano sheet/rGO composite material is characterized in that the washing in the step 4) is three times of washing with deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648820.6A CN109786728B (en) | 2018-12-30 | 2018-12-30 | NbOPO4 nanosheet/rGO composite material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648820.6A CN109786728B (en) | 2018-12-30 | 2018-12-30 | NbOPO4 nanosheet/rGO composite material and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786728A CN109786728A (en) | 2019-05-21 |
| CN109786728B true CN109786728B (en) | 2021-11-02 |
Family
ID=66499043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811648820.6A Active CN109786728B (en) | 2018-12-30 | 2018-12-30 | NbOPO4 nanosheet/rGO composite material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109786728B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115140720A (en) * | 2022-03-24 | 2022-10-04 | 山东能源集团有限公司 | Polyanion compound, preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248640A (en) * | 1991-09-25 | 1993-09-28 | Murata Manufacturing Co., Ltd. | Non-reducible dielectric ceramic composition |
| KR20140048456A (en) * | 2012-10-15 | 2014-04-24 | 삼성에스디아이 주식회사 | Positive active material, method for preparation thereof and lithium battery comprising the same |
| CN107473266A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of niobium phosphate Porous materials and its production and use |
| CN108701828A (en) * | 2015-12-07 | 2018-10-23 | 新泽西州立拉特格斯大学 | electrode material for lithium battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2629353A1 (en) * | 2012-02-17 | 2013-08-21 | Belenos Clean Power Holding AG | Non-aqueous secondary battery having a blended cathode active material |
-
2018
- 2018-12-30 CN CN201811648820.6A patent/CN109786728B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248640A (en) * | 1991-09-25 | 1993-09-28 | Murata Manufacturing Co., Ltd. | Non-reducible dielectric ceramic composition |
| KR20140048456A (en) * | 2012-10-15 | 2014-04-24 | 삼성에스디아이 주식회사 | Positive active material, method for preparation thereof and lithium battery comprising the same |
| CN108701828A (en) * | 2015-12-07 | 2018-10-23 | 新泽西州立拉特格斯大学 | electrode material for lithium battery |
| CN107473266A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of niobium phosphate Porous materials and its production and use |
Non-Patent Citations (3)
| Title |
|---|
| "A simple protocol for the preparation of b-enamino ketones catalyzed by NbOPO4 under solvent free conditions";Felipe Wodtke等;《Tetrahedron Letters》;20161208;第58卷;第231-234页 * |
| "EXAFS Study of NbOPO4-Based Lithium Superionic Conductors";J.Chaboy等;《Jpn.J.Appl.Phys.》;19930131;第32卷;第785-787页 * |
| "新型层状纳米复合材料的制备及超级电容器性能研究";陈宁娜;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20180915;第B020-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109786728A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | LDHs derived nanoparticle-stacked metal nitride as interlayer for long-life lithium sulfur batteries | |
| CN110226252B (en) | Polyanion type sodium ion battery positive electrode material and preparation method thereof | |
| Chu et al. | NiO nanocrystals encapsulated into a nitrogen-doped porous carbon matrix as highly stable Li-ion battery anodes | |
| CN107248569B (en) | Antimony/nitrogen-doped carbon composite prepared by taking 1-ethyl-3-methylimidazol dicyandiamide as carbon source and preparation method and application thereof | |
| CN112103493A (en) | Preparation method of lithium battery negative electrode material titanium-niobium composite oxide | |
| CN108598394B (en) | Carbon-coated titanium manganese phosphate sodium microspheres and preparation method and application thereof | |
| CN110326136B (en) | Novel high-potential multilayer carbon-coated polyanionic sodium-ion battery positive electrode material and preparation method thereof | |
| Song et al. | Enhanced electrochemical performance of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 cathode material with bamboo essential oil | |
| Xie et al. | Rheological phase synthesis of Fe2P2O7/C composites as the precursor to fabricate high performance LiFePO4/C composites for lithium-ion batteries | |
| CN104466110A (en) | Preparation method of high-performance lithium ion battery negative electrode material | |
| Mao et al. | Facile spray drying synthesis of porous structured ZnFe 2 O 4 as high-performance anode material for lithium-ion batteries | |
| CN105514425B (en) | A kind of high-performance room-temperature sodium-ion battery and preparation method thereof | |
| CN109037623B (en) | Positive electrode material of magnesium secondary battery and preparation method thereof | |
| CN104934577B (en) | Mesoporous Li3VO4/C nano ellipsoid composite material embedded into graphene network, and preparation method and application of composite material | |
| CN107959024B (en) | Flaky Sb for sodium ion battery cathode2Se3Method for preparing nanocrystalline | |
| CN108217725B (en) | Hydrated basic zinc pyrovanadate (Zn)3V2O7(OH)2·2H2Preparation method and application of O) material | |
| Liu et al. | Implanting MnO into a three-dimensional carbon network as superior anode materials for lithium-ion batteries | |
| CN105826556A (en) | Ultrathin-layered NbS2, preparing method thereof and application of ultrathin-layered NbS2 to lithium/sodium-ion battery | |
| CN113410459A (en) | Embedded MoSxThree-dimensional ordered macroporous graphene carbon material of nanosheet, preparation and application | |
| CN109786728B (en) | NbOPO4 nanosheet/rGO composite material and preparation method and application thereof | |
| CN109698333B (en) | Lithium-sulfur battery positive electrode material and preparation method and application thereof | |
| Yang et al. | Binder-free layered ZnO@ Ni microspheres as advanced anode materials for lithium-ion batteries | |
| CN116936771A (en) | Hollow spherical shell structure ferric sodium sulfate composite positive electrode material, preparation method and sodium ion battery | |
| CN109449440B (en) | Microporous ultrathin soft carbon nanosheet and preparation method and application thereof | |
| CN103840162A (en) | Preparation method for modified lithium battery negative electrode material, and lithium battery negative electrode sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |