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Preparation and application of SnO2@PPy/carbon cloth composite electrode material

A composite electrode and composite material technology, which is applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, tin oxide, etc., can solve the problems of poor PPy capacitor performance, high energy consumption, and long time, so as to improve capacitor performance, Simplify the operation steps and enhance the effect of binding

Pending Publication Date: 2021-08-06
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing technology in the preparation of SnO with different shapes 2 The problems of high temperature calcination, high energy consumption, long time, and difficult treatment with strong acid and strong alkali, the present invention proposes a SnO 2 For the preparation and application of @PPy / carbon cloth composite electrode materials, sodium citrate was added to the experimental system for the first time. The experiment found that when sodium citrate was used as a ligand solution to react with tin salt, there was no need to use strong alkali reagents and no calcination steps. SnO with flower-like structure can be prepared with good dispersibility 2 , which solves the problems existing in the prior art
The invention uses carbon cloth as a support, and composites PPy and transition metal oxides. The three complement each other, which can not only solve the problem of poor capacitance performance of PPy, but also improve the overall electrochemical performance of the composite material.

Method used

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  • Preparation and application of SnO2@PPy/carbon cloth composite electrode material
  • Preparation and application of SnO2@PPy/carbon cloth composite electrode material
  • Preparation and application of SnO2@PPy/carbon cloth composite electrode material

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preparation example Construction

[0028] The first aspect of the present invention provides a three-dimensional flower-like structure of SnO 2 The preparation method of the material includes: mixing the tin salt solution and the alkaline ligand solution, and reacting to obtain a three-dimensional flower-like structure of SnO 2 Material.

[0029] Select basic ligand to react with tin salt, the principle is:

[0030] Sodium citrate plays the role of stabilizer, complexing agent in this step, can form alkaline environment, promote Sn(OH) 4 Precipitation Formation, Sn(OH) 4 Precipitation will remove two molecules of water under appropriate hydrothermal conditions to generate SnO 2 .

[0031] The purpose of using strong base in the prior art is to form an alkaline environment and promote the formation of precipitation, which is similar to sodium citrate, but stronger in alkalinity and difficult to control. Moreover, the prior art often adopts a calcination step, and the purpose of calcination is to make the Sn...

Embodiment 1

[0091] Three-dimensional flower-like structure of SnO 2 material preparation

[0092] 1. Preparation of metal salt solution: accurately weigh 0.564g tin protochloride dihydrate (SnCl 2 2H 2 O) Place in a 100mL small beaker, add 10mL ethanol and 10mL deionized water in turn, stir for 10min to mix evenly, and then sonicate for about 30min until the white crystals are completely dissolved.

[0093] 2. Preparation of precipitant: accurately weigh 1.473g trisodium citrate (C 6 h 5 Na 3 o 7 ), placed in a 100mL small beaker, sequentially added 10mL ethanol and 10mL deionized water, and stirred in a 40°C water bath for 30min until the white crystals at the bottom of the beaker completely disappeared. Trisodium citrate is a strong base and weak acid salt, which will generate hydroxide ions after dissolving in water, forming an alkaline environment. Hydroxide ions are further combined with metal ions to be precipitated.

[0094] 3. SnO 2 Preparation: Nanomaterials were prepare...

Embodiment 2

[0096] SnO 2 Preparation of @PPy / carbon cloth composite electrode material

[0097] 1. Pretreatment of carbon cloth: Cut the carbon cloth into small pieces of 1*2cm, rinse with acetone, ethanol and deionized water in sequence. Place the cleaned carbon cloth in an oven at 60°C to dry overnight. Prepare a mixed solution of concentrated hydrochloric acid: concentrated nitric acid = 1:1 (volume ratio), place the carbon cloth in it, soak it for 6 hours, then wash it with distilled water several times until neutral, and finally dry it in an oven at 60°C overnight, collect stand-by.

[0098] 2. Preparation of metal salt solution: use an electronic balance to accurately weigh 0.564g of stannous chloride dihydrate (SnCl 2 2H 2 O) Place in a 100mL small beaker, add 10mL of ethanol and 10mL of deionized water in turn, stir for 10min to mix evenly, and then sonicate for 30min until the white crystals are completely dissolved.

[0099] 3. Preparation of precipitant: accurately weigh 1...

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Abstract

The invention belongs to the field of nano material synthesis technologies and energy storage materials, and particularly relates to preparation and application of a SnO2@PPy / carbon cloth composite electrode material. Sodium citrate is added into an experimental system for the first time, experiments find that when sodium citrate is used as a ligand solution to react with tin salt, SnO2 with a flower-shaped structure and good dispersity can be prepared without using a strong alkali reagent and a calcination step, and when SnO2 with different morphologies is prepared in the prior art, high-temperature calcination is adopted, the energy consumption is high, the time is long, and strong acid and strong alkali treatment difficulty is high.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis technology and energy storage materials, in particular to a SnO 2 Preparation and application of @PPy / carbon cloth composite electrode materials. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In recent decades, with the continuous development and progress of science and technology, the demand for energy in human society has also been increasing. However, traditional fossil energy is not only gradually exhausted, but also causes serious environmental pollution problems. In this context, the importance of efficient utilization and storage of clean energy is self-evident. As a new type of...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86C01G19/02
CPCH01G11/46H01G11/86C01G19/02C01P2004/03C01P2002/72C01P2006/40C01P2004/30
Inventor 陈伟付民庄庆儒
Owner SHANDONG UNIV OF SCI & TECH
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