A kind of deintercalation type vanadium-based negative electrode material and preparation method thereof

A negative electrode material, vanadium-based technology, applied in the field of deintercalated vanadium-based negative electrode materials and its preparation, can solve the problems of lack of lithium resource reserves, high cost of lithium-ion batteries, and inapplicability of large-scale energy storage, etc., to achieve stable cycle The effect of performance, low cost, and good rate performance

Active Publication Date: 2021-06-08
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, lithium resources are very scarce in the earth, which leads to the high cost of lithium-ion batteries and is not suitable for large-scale energy storage.

Method used

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  • A kind of deintercalation type vanadium-based negative electrode material and preparation method thereof
  • A kind of deintercalation type vanadium-based negative electrode material and preparation method thereof
  • A kind of deintercalation type vanadium-based negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] S1: 0.00125 mol sodium acetate, 0.000625 mol calcium acetate, 0.0025 mol ammonium metavanadate, 0.6 g ascorbic acid, 10 mL water were uniformly mixed and heated to 60°C to form a mixed solution;

[0054] S2: Add 1 g of PVP to the mixed solution obtained in S1, and stir for 30 min to obtain a viscous liquid;

[0055] S3: The viscous liquid obtained in S2 was electrospun under the conditions of a voltage of 20 kV applied to the needle, a distance between the needle and the collector of 15 cm, and a liquid discharge rate of 1.5 mL / h to obtain a nanofilament precursor;

[0056] S4: The nanofilament precursor obtained in S3 was sintered at 430 °C for 6 h to obtain Na 2 CaV 4 o 12 nanowires.

[0057] Electrode materials were prepared by electrospinning, and Examples 2-15 are shown in Table 1.

[0058] Table 1

[0059]

[0060]

Embodiment 16

[0062] S5: Mix 0.0025 mol ammonium metavanadate and 100 mL water to obtain a suspension, stir and heat the suspension to 60°C to form a clear vanadium solution;

[0063] S6: Add 0.00125 mol sodium acetate, 0.000625 mol calcium acetate, and 0.3 g acetic acid to the vanadium solution obtained in S5, and stir to obtain a clear precursor solution;

[0064] S7: Spray-dry the precursor solution obtained in S6 under the conditions of an inlet temperature of 180°C, an outlet temperature of 100°C, and a liquid inlet rate of 300 mL / h to obtain microspheres;

[0065] S8: The microspheres obtained in S7 were sintered at 430°C for 10 h to obtain Na 2 CaV 4 o 12 porous microspheres.

[0066] Electrode materials were prepared by spray drying method, Examples 17-35 are shown in Table 2.

[0067] Table 2

[0068]

[0069]

[0070] image 3 Na prepared by the method described in Example 1 and Example 16 2 CaV 4 o 12 The XRD pattern of the analysis shows that the Na prepared by el...

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Abstract

The invention belongs to the technical fields of electrochemistry, material chemistry and chemical power supply products, and more specifically relates to a de-embedded vanadium-based negative electrode material and a preparation method thereof. The chemical formula of the electrode material provided by the present invention is Na 2 CaV 4 o 12 . The electrode material provided by the invention is used as the negative electrode material of lithium, sodium and potassium ion batteries, and has the advantages of high theoretical specific capacity, good safety performance, excellent cycle performance and the like. The preparation method and synthesis process involved in the electrode material provided by the invention are simple, suitable for charging and discharging of high-power devices such as electric vehicles and large-scale energy storage equipment, and have broad application prospects in the field of energy storage. The invention provides more choices for the materials used for the negative electrode of the secondary battery.

Description

technical field [0001] The invention belongs to the technical fields of electrochemistry, material chemistry and chemical power supply products, and more specifically relates to a de-embedded vanadium-based negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are relatively safe and efficient energy storage devices at present, with the advantages of large capacity and long life. However, current commercial lithium-ion batteries are difficult to meet the high energy density demand of electric vehicles. The density of lithium-ion batteries is mainly determined by the battery material, and the negative electrode material is responsible for storing lithium ions from the positive electrode. Already commercialized lithium-ion battery anode materials graphite and Li 4 Ti 5 o 12 All have intrinsic defects. The working potential of graphite is too low, which is easy to cause safety problems. Li 4 Ti 5 o 12 The reve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/38H01M4/58H01M10/0525
CPCH01M4/38H01M4/485H01M4/5825H01M10/0525Y02E60/10
Inventor 林春富梁贵生赵修松
Owner QINGDAO UNIV
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