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Potassium phosphate metal salt organic compound positive electrode material based on vanadium and preparation method thereof

A technology of organic compounds and positive electrode materials, applied in the field of potassium phosphate metal salt organic compound positive electrode materials and its preparation, can solve the problems of numerous production steps, complicated process flow, poor environmental protection performance, etc., and achieve strong controllability and good repeatability , low cost effect

Active Publication Date: 2022-03-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the many steps in the production of materials, the process flow is complicated, and a large amount of waste liquid will be generated in the process, so the pollution is relatively large and the environmental protection performance is poor.

Method used

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  • Potassium phosphate metal salt organic compound positive electrode material based on vanadium and preparation method thereof
  • Potassium phosphate metal salt organic compound positive electrode material based on vanadium and preparation method thereof
  • Potassium phosphate metal salt organic compound positive electrode material based on vanadium and preparation method thereof

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reference example 1

[0054] The carbon nanotubes used in the embodiments of the present invention are subjected to acidification treatment before use. The specific method is: add 0.2 g of carbon nanotubes to 100 mL of mixed acid (concentrated sulfuric acid and concentrated nitric acid are mixed at a volume ratio of 3:1), At room temperature, at 300W, carry out ultrasonic dispersion for 4 hours, after cooling to room temperature, add 400mL water to dilute, then use a microporous membrane with a pore size of 0.45μm to carry out suction filtration, wash, repeat the above operation until the washing liquid is neutral, Finally, vacuum-dry at 90° C. to constant weight to obtain acidified carbon nanotubes.

Embodiment 1

[0056] The vanadium-based potassium phosphate metal salt organic compound positive electrode material is a layered material formed by doping acidified carbon nanotubes in the metal organic phosphate framework potassium ion positive electrode material; the metal organic phosphate framework potassium ion positive electrode The single crystal molecular formula of the material is: C2H10K2O16P2V2, the molecular structure belongs to the monoclinic crystal structure whose space group is the chiral non-central space group; the molecular grain size of the single crystal is 2.1 μm; the potassium phosphate based on vanadium The metal salt organic compound positive electrode material has a layered structure, and the width of the layered structure is 0.1-3 μm; the doping amount of the acidified carbon nanotube is 5% of the mass of the metal organic phosphate frame potassium ion positive electrode material.

[0057] Such as figure 1 As shown, the potassium phosphate metal salt organic compo...

Embodiment 2

[0070] The vanadium-based potassium phosphate metal salt organic compound positive electrode material is a layered material formed by doping acidified carbon nanotubes in the metal organic phosphate framework potassium ion positive electrode material; the metal organic phosphate framework potassium ion positive electrode The single crystal molecular formula of the material is: C2H10K2O16P2V2, and the molecular structure belongs to the monoclinic crystal structure whose space group is the chiral non-central space group; the grain size of the single crystal molecule is 1.5 μm; the vanadium-based phosphoric acid The potassium metal salt organic compound positive electrode material has a layered structure, and the width of the layered structure is 3-4 μm; the doping amount of the acidified carbon nanotube is 8% of the mass of the metal organic phosphate framework potassium ion positive electrode material.

[0071] After testing, the positive electrode material of the potassium phosph...

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Abstract

Potassium phosphate metal salt organic compound positive electrode material based on vanadium and preparation method thereof, the molecular formula of the positive electrode material is: C 2 h 10 K 2 o 16 P 2 V 2 , the anode material is made by doping a carbon nanotube conductive agent and a potassium source, and belongs to a monoclinic structure. The method is as follows: (1) adding the vanadium-containing compound into water, after dispersing, adding a phosphorus source, stirring, adding a potassium source, and dispersing evenly; (2) hydrothermal reaction, filtering, washing and precipitation, and drying to obtain K-organic Frame structure material; (3) mixed with carbon nanotube conductive agent, ground and ready. The cathode material of the invention has high discharge gram capacity, good rate performance, stable cycle performance and coulombic efficiency; the synthesis method of the invention has low synthesis temperature, simple operation, low cost, strong controllability and good repeatability, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a potassium ion positive electrode material and a preparation method thereof, in particular to a vanadium-based potassium phosphate metal salt organic compound positive electrode material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, research on energy storage materials with high energy efficiency, abundant resources, and environmental friendliness is a necessary condition for the sustainable development of human society. In order to meet the large-scale market demand, it is far from enough to measure battery materials only by energy density, charge-discharge rate and other properties. [0003] Novel organic materials and metal-organic frameworks (MOFs) have also shown potential applications as electrode materials for Na-ion batteries. Compared with the current cathode materials, the biggest o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/62H01M10/054C08G83/00C07F9/00B82Y40/00B82Y30/00
CPCH01M4/60H01M4/625H01M10/054C07F9/005C08G83/008B82Y30/00B82Y40/00Y02E60/10
Inventor 欧星范鑫铭罗弼张佳峰张宝
Owner CENT SOUTH UNIV
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