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Layered metal organic phosphate frame sodium ion cathode material and preparation method thereof

A technology of cathode materials and layered metals, applied in the field of sodium ion cathode materials and their preparation, can solve the problems of complex process flow, numerous production steps, poor environmental performance, etc., and achieve good repeatability, strong controllability, and low cost Effect

Active Publication Date: 2019-03-29
江西潮实新能源科技有限公司
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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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  • Layered metal organic phosphate frame sodium ion cathode material and preparation method thereof
  • Layered metal organic phosphate frame sodium ion cathode material and preparation method thereof
  • Layered metal organic phosphate frame sodium ion cathode material and preparation method thereof

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reference example 1

[0057] The carbon conductive agent used in the embodiment of the present invention is acidified before use. The specific method is: add 0.2g of the carbon conductive agent to 100mL (concentrated sulfuric acid and concentrated nitric acid are mixed at a volume ratio of 3:1) mixed acid, 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 until constant weight to obtain the acidified carbon conductive agent.

Embodiment 1

[0059] The layered metal organophosphate framework sodium ion cathode material is a layered material formed by doping acidified carbon nanotubes in the metal organophosphate framework sodium ion cathode material; the metal organophosphate framework sodium ion cathode material The single crystal molecular formula is: C 2 h 10 Na 2 o 16 P 2 V 2 , the molecular structure belongs to the monoclinic structure whose space group is the chiral non-central space group; the unit cell volume of the single crystal molecule is 683.94982 Å 3 , the grain size is 131.6 nm, and the crystallinity is 87.17%; the layered metal organophosphate framework sodium ion positive electrode material is a layered nanosheet structure, and the width of the nanosheet is 1 to 5 μm; the acidified carbon nanotube The doping amount is 5% of the mass of the metal organophosphate framework sodium ion positive electrode material; the particle diameter of the acidified carbon nanotubes doped in the nanosheets is ...

Embodiment 2

[0075] The layered metal organophosphate framework sodium ion cathode material is a layered material formed by doping acidified carbon nanotubes in the metal organophosphate framework sodium ion cathode material; the metal organophosphate framework sodium ion cathode material The single crystal molecular formula is: C 2 h 10 Na 2 o 16 P 2 V 2 , the molecular structure belongs to the monoclinic structure whose space group is the chiral non-central space group; the unit cell volume of the single crystal molecule is 685.6 Å 3 , the grain size is 121.5nm, and the crystallinity is 95%; the sodium ion positive electrode material of the layered metal organophosphate framework is a layered nanosheet structure, and the width of the nanosheet is 5-10 μm; the acidified carbon nanotube The doping amount is 8% of the mass of the metal organophosphate framework sodium ion positive electrode material; the particle diameter of the acidified carbon nanotubes doped in the nanosheets is 0.1...

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Abstract

The invention provides a layered metal organic phosphate frame sodium ion cathode material and a preparation method thereof. The cathode material is a layered material formed by doping a carbon conductive agent in a metal organic phosphate frame sodium ion cathode material. The single crystal molecular formula of the metal organic phosphate frame sodium ion cathode material is C2H10Na2O16P2V2, andthe molecular structure belongs to a structure of the monoclinic system with the space group being a chiral non-center space group. The method is comprises the following steps: (1) adding a vanadiumsource to water, performing dispersing, adding phosphoric acid, oxalic acid dihydrate, performing stirring, adding a sodium source, and performing dispersing uniformly; (2) performing the hydrothermalreaction, performing filtering, washing and precipitating and drying to obtain an Na-MOF material; (3) mixing the Na-MOF material with a carbon conductive agent, performing grounding to obtain the cathode material. The cathode material of the invention has a large discharge gram volume, is good in rate performance, and is stable in cycle performance and coulombic efficiency. The method of the invention is low in synthesis temperature, is simple in operation, is low in cost, is high in controllability, is good in repeatability, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a sodium ion positive electrode material and a preparation method thereof, in particular to a layered metal organic phosphate framework sodium ion 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 obstacle for M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/054
CPCH01M4/366H01M4/60H01M4/625H01M10/054Y02E60/10
Inventor 郑俊超林可博范鑫铭刘洋贺振江童汇
Owner 江西潮实新能源科技有限公司
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