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Preparation method and application of K1.33Mn8O16

A k1.33mn8o16, stirring reaction technology, used in the manufacture of hybrid/electric double-layer capacitors, electrolytic capacitors, electrical components, etc., to achieve highly reversible insertion-desorption behavior, low energy consumption, and good safety.

Active Publication Date: 2017-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] About K 1.33 mn 8 o 16 In addition to the reported applications in dye removal and wastewater treatment, K 1.33 mn 8 o 16 Reports as electrode materials for supercapacitors

Method used

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  • Preparation method and application of K1.33Mn8O16
  • Preparation method and application of K1.33Mn8O16
  • Preparation method and application of K1.33Mn8O16

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A certain amount of Mn(Ac) 2 ·H 2 O and citric acid (CA) were mixed so that the molar ratio of the substances was Mn / CA=1, 60 mL of distilled water was added, heated in a water bath at 70°C and magnetically stirred to fully dissolve the mixture. Then add a certain amount of KHCO to the solution 3 , so that the amount ratio of the substance is K / Mn=0.17, and the product obtained after fully stirring and dissolving is a colorless and transparent sol through the light transmission test of a laser pointer. The sol was dried at 110°C to obtain a white gel. Grind the gel above and place it in a 60cm×90cm porcelain boat and place the porcelain boat with the gel in a muffle furnace at 8°C min -1 The temperature was raised to 550°C at a certain rate and kept for 6 hours. After cooling to room temperature, take out the porcelain boat to obtain the product. The obtained product was subjected to phase analysis on an X-ray powder diffractometer (Dandong, Y-3000). The test condi...

Embodiment 2

[0035] A certain amount of MnCO 3 and citric acid (CA) to make the molar ratio Mn / CA=1, add 70mL of distilled water, place in a 60°C water bath and heat with magnetic stirring to fully dissolve the mixture. Then add a certain amount of K to the solution 2 CO 3 , so that the material ratio K / Mn is 0.25, and the product obtained after fully stirring and dissolving is a colorless and transparent sol through the light transmission test of a laser pointer. The sol was dried at 110°C to obtain a white gel. Grind the gel above and place it in a 60cm×90cm porcelain boat and place the porcelain boat with the gel in a muffle furnace at 8°C min -1 The temperature was raised to 650°C at a certain rate and kept for 4 hours. After cooling to room temperature, take out the porcelain boat to obtain the product. The product was proved to be the same substance as the product in Example 1 by XRD analysis. The product was subjected to infrared spectroscopic analysis on an FT-IR spectrometer...

Embodiment 3

[0037] K prepared in Example 1 1.33 mn 8 o 16 Mix powder, acetylene black and polytetrafluoroethylene (PTFE) in a mass ratio of 80:15:5, add a small amount of distilled water and ethanol, and continue to stir until the mixture is in the shape of plasticine, and roll it into a thickness of about 10 μm. Film, cut the film into thin slices with a size of 1cm×1cm, press the thin slices with 300-mesh 316L stainless steel mesh under a pressure of 12MPa, and dry them in a vacuum oven at 120°C for 8 hours to make electrode sheets. With the platinum sheet electrode as the counter electrode and the saturated calomel electrode as the reference electrode, the prepared K 1.33 mn 8 o 16 The electrode is the working electrode, with 0.5mol L -1 Potassium sulfate solution was used as the electrolyte, and the CHI760d electrochemical workstation was used to set the potential scan rate to 1mV s -1 , respectively in 0~0.1V(vs.SCE), 0~0.2V(vs.SCE), 0~0.3V(vs.SCE), 0~0.5V(vs.SCE), 0~0.6V(vs. ...

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Abstract

The invention discloses a preparation method and application of K1.33Mn8O16. Manganous salt, sylvite and organic carboxylic acid are mixed with water, and stirring is carried out to perform reaction to obtain sol; drying and dehydration are carried out on the sol to obtain gel; the gel is calcined to obtain the K1.33Mn8O16. The preparation method is simple, convenient and easy to operate, and has the advantages of green, environmental-friendliness, safety and low cost. When the prepared K1.33Mn8O16 is used as an electrode material for making a super capacitor electrode, the super capacitor electrode shows highly-reversible potassium ion intercalation-deintercalation behaviors and rechargeable and dischargeable performance, can obtain a specific capacitance of 110F g<-1> under a voltage of 0 to 1.2V, and has the advantages of good reversibility and wide working potential window.

Description

technical field [0001] The present invention relates to K 1.33 mn 8 o 16 The preparation method and K 1.33 mn 8 o 16 The application in supercapacitors belongs to the technical field of supercapacitor preparation. Background technique [0002] In recent years, with the rise of supercapacitors and the in-depth research on supercapacitor electrode materials, embedded compounds have shown good electrochemical performance as supercapacitor electrode materials, which has attracted people's attention. Among them, manganese-based alkali metal ion intercalation compounds are particularly attractive because of their abundant raw material resources, low cost, and environmental friendliness. [0003] Currently, LiMn with a three-dimensional tunnel structure has been reported as a manganese-based alkali metal ion intercalation compound for supercapacitor electrode materials. 2 o 4 , 3×2 and 3×1 mixed tunnel structure Na 4 mn 9 o 18 (Na 0.44 MnO 2 ) and layered NaMnO 2 、K ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/06H01G11/46H01G11/50H01G11/86
CPCY02E60/13H01G11/46H01G11/06H01G11/50H01G11/86
Inventor 钱东蒋剑波李俊华李军刘昆闵紫嫣
Owner CENT SOUTH UNIV
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