Lithium ferrite @PPy supercapacitor electrode material with core-shell structure and preparation method thereof

A supercapacitor, core-shell structure technology, applied in the field of material science, can solve the problems of poor electrical conductivity, small powder particle size, small specific surface area, etc., and achieve the effects of low cost, large specific surface area, and simple preparation process

Active Publication Date: 2018-11-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LiFe prepared by these methods 5 o 8 The powder particle size is relatively small, and the specific surface area is small, and the conductivity is poor

Method used

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  • Lithium ferrite @PPy supercapacitor electrode material with core-shell structure and preparation method thereof
  • Lithium ferrite @PPy supercapacitor electrode material with core-shell structure and preparation method thereof
  • Lithium ferrite @PPy supercapacitor electrode material with core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] LiFe with a core-shell structure 5 o 8 The preparation method of @PPy supercapacitor electrode material, comprises the following steps:

[0045] (1) First, 0.01 g of CTAB was added to 100 mL of N,N dimethylformamide to obtain mixed solution A.

[0046] (2) Then 0.1g LiFe 5 o 8 The powder and 0.02 g of PPy nanotubes were added to the mixed solution A, and the mixed solution B was obtained by ultrasonication at 600 W for 4 hours.

[0047] (3) Pour the mixed solution B into a three-necked flask, heat and stir in a water bath at 80°C, and feed nitrogen at the same time;

[0048](4) Add 12.5 mL of hydrazine hydrate and 5 mL of methyl mercaptoacetate dropwise to the mixed solution B, and continue to protect with nitrogen for 30 min. After the reaction is carried out for 45 min, stop the reaction with supercooled ethanol;

[0049] (5) After the precipitate obtained after the reaction was washed three times with absolute ethanol and deionized water, vacuum-dried for 10 h, ...

Embodiment 2

[0051] LiFe with a core-shell structure 5 o 8 The preparation method of @PPy supercapacitor electrode material, comprises the following steps:

[0052] (1) First, 0.01 g of CTAB was added to 100 mL of N,N dimethylformamide to obtain mixed solution A.

[0053] (2) Then 0.1g LiFe 5 o 8 The powder and 0.03g PPy nanotubes were added to the mixed solution A, and the mixed solution B was obtained by ultrasonication at 600W for 5h;

[0054] (3) Pour the mixed solution B into a three-necked flask, heat and stir in a water bath at 80°C, and feed nitrogen at the same time;

[0055] (4) Add 12.5 mL of hydrazine hydrate and 5 mL of methyl mercaptoacetate dropwise to the mixed solution B, and continue to protect with nitrogen for 30 min. After the reaction is carried out for 45 min, stop the reaction with supercooled ethanol;

[0056] (5) After the precipitate obtained after the reaction was washed three times with absolute ethanol and deionized water, vacuum-dried for 10 h, LiFe with...

Embodiment 3

[0067] LiFe with a core-shell structure 5 o 8 The preparation method of @PPy supercapacitor electrode material, comprises the following steps:

[0068] (1) First, add 0.01 g of PVP into 100 mL of N,N dimethylformamide to obtain a mixed solution A.

[0069] (2) Add 0.1g LiFe 5 o 8 The powder and 0.04g PPy nanotubes were added to the mixed solution A, and the mixed solution B was obtained by ultrasonication for 6h;

[0070] (3) Pour the mixed solution B into a three-necked flask, heat and stir in a water bath at 80°C, and feed nitrogen at the same time;

[0071] (4) Add 12.5 mL of hydrazine hydrate and 5 mL of methyl mercaptoacetate dropwise to the mixed solution B, and continue to protect with nitrogen for 30 min. After the reaction is carried out for 45 min, stop the reaction with supercooled ethanol;

[0072] (5) After the precipitate obtained after the reaction was washed three times with absolute ethanol and deionized water, vacuum-dried for 10 h, LiFe with a core-shel...

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Abstract

Disclosed is a preparation method of a lithium ferrite @PPy supercapacitor electrode material with a core-shell structure; the preparation method comprises the steps of firstly, adding a surfactant into N, N dimethylformamide to obtain a mixed solution A; then adding LiFe<5>O<8> powder and PPy nanotubes into the mixed solution A, and performing uniform ultrasonic mixing to obtain a mixed solutionB; and pumping nitrogen to the mixed solution B and performing heating to a temperature of 75-85 DEG C, and next, dropwise adding a mixture of hydrazine hydrate and methyl mercaptoacetate, and performing reacting for 15-45min, and carrying out water washing and drying to obtain the lithium ferrite @PPy supercapacitor electrode material with the core-shell structure. The preparation process is simple, short in period, low in cost and low in energy consumption; and the prepared nano composite material has a relatively large specific surface area, high capacitance characteristic and electrochemical stability and high application prospect in the aspect of energy storage.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a lithium ferrite@PPy supercapacitor electrode material with a core-shell structure and a preparation method thereof. Background technique [0002] Conductive polymers have the advantages of high specific capacitance, good electronic conductivity and low internal resistance. PPy in conductive polymers has attracted the attention of scholars at home and abroad because of its convenient preparation, high electrical conductivity, good air stability, and rich and varied electrochemical properties, but it also has shortcomings, such as difficult to dissolve, difficult to melt, and poor mechanical properties. etc. Therefore, polypyrrole is often compounded with metals or metal oxides to improve its mechanical and electrochemical properties, which makes polypyrrole composite materials a research hotspot. And LiFe 5 o 8 Powder is widely used in supercapacitor electrode materials and abso...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46H01G11/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/30H01G11/46H01G11/48Y02E60/13
Inventor 杨海波董镜镜宗翰文林营
Owner SHAANXI UNIV OF SCI & TECH
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