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MXene composite modified VO2 positive electrode material for zinc ion battery and preparation method thereof

A zinc-ion battery and cathode material technology, which is applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of low electron/ion transfer kinetics and easy structure collapse, and achieve good commercial value and excellent low-temperature performance. , the effect of excellent rate performance

Pending Publication Date: 2021-10-15
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

VO 2 has a unique shared edge VO 6 The layered structure formed by octahedron can support the intercalation and deintercalation of zinc ions But VO 2 There are also many disadvantages, such as low electron / ion transfer kinetics and easy structure collapse during charge and discharge

Method used

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  • MXene composite modified VO2 positive electrode material for zinc ion battery and preparation method thereof
  • MXene composite modified VO2 positive electrode material for zinc ion battery and preparation method thereof
  • MXene composite modified VO2 positive electrode material for zinc ion battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] MXene compound modified VO 2 The preparation method of the zinc ion battery cathode material is as follows:

[0033] Mix MXene powder 0.1g with VO 2 Disperse 2g of the powder into 60ml of deionized water and stir for 30min to make it uniform, then place it in an ultrasonic machine, first perform continuous ultrasonication at a frequency of 20Hz for 1h, and then freeze-dry the solution in a freeze dryer at -30°C for 72h to reach full moisture Sublimation, the residue is the positive electrode material of zinc ion battery.

Embodiment 2

[0035] Mix MXene powder 0.1g with VO 2Disperse 0.5g of the powder into 40ml of deionized water and stir for 30min to make it uniform, then place it in an ultrasonic machine, first perform continuous ultrasonication at a frequency of 20Hz for 1h, and then freeze-dry the solution in a -30°C freeze dryer for 72h and freeze-dry until complete The water is sublimated, and the residue is the positive electrode material of the zinc-ion battery.

Embodiment 3

[0037] Mix MXene powder 0.1g with VO 2 Disperse 1g of the powder into 20ml of deionized water and stir for 30min to make it uniform, then place it in an ultrasonic machine, first perform continuous ultrasonication at a frequency of 20Hz for 1h, and then freeze-dry the solution in a freeze dryer at -30°C for 72h to reach full moisture Sublimation, the residue is the positive electrode material of zinc ion battery.

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Abstract

The invention discloses an MXene composite modified VO2 positive electrode material for a zinc ion battery, which comprises a heterostructure formed by an MXene nanosheet and a VO2 nanorod, and the heterostructure is a central sphere with an opening. The invention also discloses a preparation method of the zinc ion battery positive electrode material of MXene composite modified VO2, the MXene nanosheet and the VO2 nanorod are dispersed in deionized water and uniformly stirred, ultrasonic treatment is firstly carried out, then freeze-drying is carried out until all water is sublimated, and the remainder is the zinc ion battery positive electrode material. The MXene composite modified VO2 positive electrode material has relatively high capacity and excellent rate capability, and particularly, still keeps very high capacity and rate capability at low temperature.

Description

technical field [0001] The present invention relates to a kind of positive electrode material of zinc ion battery and preparation method thereof, particularly relate to a kind of MXene composite modification VO 2 A cathode material for a zinc ion battery and a preparation method thereof. Background technique [0002] Currently, lithium-ion batteries (LIBs) have entered the market due to their high voltage, high power density, and long lifetime. However, lithium-ion batteries have some natural defects, such as shortage of lithium resources, expensive lithium metal, and high cost. Secondly, the organic electrolyte used in lithium-ion batteries is often highly toxic, and environmental pollution is a problem that cannot be ignored. [0003] In order to solve the above problems of lithium-ion batteries, many researchers have turned their attention to water-based batteries. The standard electrode potential of zinc is -0.76v, the price of metal zinc is low, the storage of zinc me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/04H01M4/48H01M10/38B82Y30/00B82Y40/00
CPCH01M4/628H01M4/62H01M4/48H01M10/38H01M4/04B82Y30/00B82Y40/00Y02P70/50Y02E60/10
Inventor 苗晓伟杨刚寇玮智倪欢王倩
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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