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Carbon-coating orthorhombic system nanometer rod shape Nb2O5 material and manufacturing method thereof

An orthorhombic, nano-rod-like technology, applied in the field of lithium-ion batteries, can solve the problems of low material capacity and poor rate performance, and achieve the effects of improving reaction speed, performance and low capacity.

Active Publication Date: 2017-01-18
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solves the current commonly used Nb 2 o 5 The problem of low material capacity and poor rate performance also has the advantages of good electrical conductivity, simple and easy fabrication method, low cost and suitable for large-scale production. It is very suitable for use as a negative electrode material for lithium-ion hybrid supercapacitors

Method used

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  • Carbon-coating orthorhombic system nanometer rod shape Nb2O5 material and manufacturing method thereof
  • Carbon-coating orthorhombic system nanometer rod shape Nb2O5 material and manufacturing method thereof
  • Carbon-coating orthorhombic system nanometer rod shape Nb2O5 material and manufacturing method thereof

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preparation example Construction

[0036] One aspect of the present invention provides a carbon-coated orthorhombic nanorod-shaped Nb 2 o 5 The preparation method of the material is characterized in that the preparation method comprises the following steps:

[0037] Step 1: Take a certain amount of oleic acid and trioctylamine, and mix the oleic acid and trioctylamine evenly according to the volume ratio of 3:16 to prepare mixture A;

[0038] Step 2: Add a certain amount of ammonium niobate oxalate into the above mixture A, and stir to obtain solution B;

[0039] Step 3: The solution B obtained in step 2 is subjected to microwave hydrothermal reaction, wherein the temperature range is set at 150°C-170°C, and the reaction time is set at 30min-1h;

[0040] Step 4: centrifuging the product obtained after the reaction in step 3, thereby obtaining a solid-liquid mixture C with a small amount of residual solvent in the lower layer;

[0041] Step 5: Put the solid-liquid mixture C obtained in step 4 into a tube furn...

Embodiment 1

[0048] Stir the oleic acid and trioctylamine with a volume ratio of 3:16 until they are evenly mixed, then add 1.65mM ammonium niobate oxalate to the solution, and stir overnight; put the above solution in a microwave hydrothermal reaction kettle for microwave Hydrothermal reaction, in which the temperature is set at 150°C, and the reaction time is set at 30 minutes; the product after the microwave hydrothermal reaction is centrifuged to obtain a solid-liquid mixture with a small amount of residual solvent in the lower layer; the above mixture is placed in a porcelain Put it in a boat and put it into a tube furnace for calcination treatment, wherein the atmosphere is Ar atmosphere, the calcination temperature is 800°C, and the calcination time is set to 1h.

Embodiment 2

[0050] Stir the oleic acid and trioctylamine with a volume ratio of 3:16 until they are evenly mixed, then add 1.65mM ammonium niobate oxalate to the solution, and stir overnight; put the above solution in a microwave hydrothermal reaction kettle for microwave Hydrothermal reaction, in which the temperature is set at 150 ° C, and the reaction time is set at 1 h; the product after the microwave hydrothermal reaction is centrifuged to obtain a solid-liquid mixture with a small amount of residual solvent in the lower layer; the above mixture is placed in a porcelain Put it in a boat and put it into a tube furnace for calcination treatment, wherein the atmosphere is Ar atmosphere, the calcination temperature is 800°C, and the calcination time is set to 1h.

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Abstract

The invention belongs to the lithium ion battery field and especially relates to a carbon-coating orthorhombic system nanometer rod shape Nb2O5 material and a manufacturing method thereof. The method comprises the following steps of mixing oleic acid and trioctylamine uniformly according to a proportion so as to acquire a mixture A; then adding a mount of niobium acid ammonium oxalate into the mixture A and stirring to acquire a solution B; carrying out microwave hydrothermal reaction on the solution B; carrying out centrifugal separation on a product acquired through the reaction in the step3 so as to acquire a solid-liquid mixture C; and finally putting the solid-liquid mixture C into a tubular furnace and carrying out calcinations processing. The Nb2O5 material acquired through the above method is used for manufacturing a lithium ion mixing super capacitor. By using the carbon-coating orthorhombic system nanometer rod shape Nb2O5 material, problems that an existing Nb2O5 material which is commonly used has a low capacity and a poor rate capability are solved; and the material has advantages that conductivity performance is good; manufacturing method is simple and easy; cost is low; and the material is suitable for large scale production and so on.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and more specifically relates to a carbon-coated orthorhombic nano-rod-shaped niobium pentoxide material and a preparation method thereof, which have high capacity, good rate and cycle performance. Background technique [0002] With the development of hybrid electric vehicles and its demand for energy storage devices with high energy density and high power density, lithium-ion hybrid supercapacitors are a new type of energy storage components that have gradually attracted attention in recent years. Due to the simultaneous use of electrode materials for lithium-ion batteries and supercapacitors, lithium-ion hybrid supercapacitors have dual characteristics of batteries and capacitors, and have the advantages of higher energy density than conventional capacitors and higher power density than lithium-ion batteries. However, since the redox reaction of the negative electrode material is significan...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/46H01G11/86H01M4/485H01M4/62B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/32H01G11/46H01G11/86H01M4/485H01M4/625Y02E60/10Y02E60/13
Inventor 胡先罗杨惠玲黄云辉
Owner HUAZHONG UNIV OF SCI & TECH
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