A monoclinic structure fe 2 (moo 4 ) 3 Nanowire and its preparation method and application

A nanowire, a single technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of reduced battery area/volume energy density, decreased cycle life, increased battery internal resistance, etc. magnifying effect

Active Publication Date: 2022-03-29
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies on the long cycle life of iron molybdate electrode materials at high current densities have not been reported, which may be due to the fact that the nanostructure with high specific surface area will lead to serious interfacial reactions between electrode materials and electrolytes leading to electrolysis. Liquid consumption, resulting in increased internal resistance of the battery and deterioration of the material structure, while nanomaterials will reduce the tap density, which will eventually lead to a decrease in the area / volume energy density of the battery and a decrease in cycle life

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A monoclinic structure fe <sub>2</sub> (moo <sub>4</sub> ) <sub>3</sub> Nanowire and its preparation method and application
  • A monoclinic structure fe <sub>2</sub> (moo <sub>4</sub> ) <sub>3</sub> Nanowire and its preparation method and application
  • A monoclinic structure fe <sub>2</sub> (moo <sub>4</sub> ) <sub>3</sub> Nanowire and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A monoclinic structure Fe disclosed in this embodiment 2 (MoO 4 ) 3 The preparation method of nanowires includes the following steps.

[0030] 1), put 0.5387 g ferric nitrate nonahydrate (Fe(NO 3 ) 3 ·9H 2 O) with 2 mL of nitric acid (HNO) 3) was dissolved in 20 mL of ultrapure water, mixed and stirred to obtain a clear and transparent solution.

[0031] 2), weigh 0.3530 g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, n Fe :n Mo =2:3) were dissolved in 20 mL of ultrapure water and stirred evenly to obtain a clear, colorless solution.

[0032] 3) Add the ferric nitrate nonahydrate solution obtained in step 1) into the ammonium molybdate solution obtained in step 2), and stir for 5 h to obtain a clear brown-yellow solution.

[0033] 4), put the precursor solution obtained in step 3) into a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 160 °C for 48 h, wash the hydrothermal product, and dry to obtain a yellow-green precurs...

Embodiment 2

[0043] A monoclinic structure Fe disclosed in this embodiment 2 (MoO 4 ) 3 The preparation method of the nanowire includes the following steps.

[0044] 1), 0.5387 g ferric nitrate nonahydrate ((Fe(NO 3 ) 3 9H 2 O) with 1 mL nitric acid (HNO 3 ) was dissolved in 20 mL of ultrapure water, mixed and stirred to obtain a clear and transparent solution.

[0045] 2), weigh 0.3530 g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, n Fe :n Mo =2:3) were dissolved in 20 mL of ultrapure water and stirred evenly to obtain a clear, colorless solution.

[0046] 3) Add the ferric nitrate nonahydrate solution obtained in step 1) into the ammonium molybdate solution obtained in step 2), and stir for 5 h to obtain a clear brown-yellow solution.

[0047] 4), put the precursor solution obtained in step 3) into a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 160 °C for 24 h, wash the hydrothermal product, and dry to obtain a yellow-green precursor p...

Embodiment 3

[0051] A monoclinic structure Fe disclosed in this embodiment 2 (MoO 4 ) 3 The preparation method of the nanowire includes the following steps.

[0052] 1), 0.5387 g ferric nitrate nonahydrate ((Fe(NO 3 ) 3 9H 2 O) with 3 mL nitric acid (HNO 3 ) was dissolved in 20 mL of ultrapure water, mixed and stirred to obtain a clear and transparent solution.

[0053] 2), weigh 0.3530 g ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O, n Fe :n Mo =2:3) were dissolved in 20 mL of ultrapure water and stirred evenly to obtain a clear, colorless solution.

[0054] 3) Add the ferric nitrate nonahydrate solution obtained in step 1) into the ammonium molybdate solution obtained in step 2), and stir for 9 h to obtain a clear brown-yellow solution.

[0055]4), put the precursor solution obtained in step 3) into a polytetrafluoroethylene reaction kettle, perform a hydrothermal reaction at 140 °C for 48 h, wash the hydrothermal product, and dry to obtain a yellow-green prec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a monoclinic structure Fe 2 (MoO 4 ) 3 The nanowires have sharp XRD diffraction peaks and no impurity peaks, have good crystallinity, and the size of the nanowires is relatively uniform. The average diameter of a single nanowire is 100 nm, and the length is 1-2 um; its preparation method is also disclosed. Dissolve ferric nitrate nonahydrate and nitric acid in ultrapure water to obtain ferric nitrate nonahydrate solution, weigh the corresponding amount of ammonium molybdate tetrahydrate and dissolve it in ultrapure water to obtain ammonium molybdate solution, add ferric nitrate nonahydrate solution to molybdenum Stir in the ammonium acid solution to obtain a clear yellow solution, put the obtained precursor solution in a polytetrafluoroethylene reactor for hydrothermal reaction, wash and dry the hydrothermal product to obtain a yellow-green precursor powder, and place the precursor powder in an air atmosphere calcined at the bottom to obtain yellow Fe 2 (MoO 4 ) 3 Nanowires; their use in the preparation of negative electrodes for lithium-ion batteries is also disclosed. The invention has the characteristics of simple process, mild reaction conditions and excellent electrochemical performance of the material.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a monoclinic structure Fe 2 (MoO 4 ) 3 Nanowires, and a controllable preparation method thereof, and the material as a negative electrode active material for lithium ion batteries. Background technique [0002] With the demand for high energy density, high power density and environmentally friendly batteries for electric vehicles, the current commercial batteries using graphite as the anode material are due to their low theoretical capacity (370 mA h / g) and unsatisfactory rate. performance and cannot meet the growing demands of people. Therefore, more and more people are devoted to developing new anode materials to improve the energy density, power density and cycle stability of Li-ion batteries. [0003] Fe 2 O 3 Due to its high theoretical capacity (1005 mA h / g), environmental friendliness, and low cost, it has become a promising can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00H01M4/48H01M4/52H01M10/0525B82Y30/00B82Y40/00
CPCC01G39/00H01M4/523H01M4/483H01M10/0525B82Y30/00B82Y40/00H01M2004/021H01M2004/027C01P2002/72C01P2002/77C01P2004/64C01P2004/62C01P2004/61C01P2004/16C01P2004/03C01P2004/04C01P2006/40Y02E60/10
Inventor 梁晨楠危伟魏冰歆陶锴王灿
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap