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Preparation method of sodium fluoride double-ion battery and its application in electrochemical defluorination

A dual-ion, sodium fluoride technology, applied in electrochemical generators, chemical instruments and methods, secondary batteries, etc., can solve the problems of poor fluoride ion removal ability and low efficiency

Active Publication Date: 2020-08-18
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Precipitation method is suitable for treating industrial wastewater with high fluoride content, but secondary treatment is often required if the precipitation method is not completely treated. The chemicals required for treatment include lime, alum, dolomite, etc.
The adsorption method is suitable for treating industrial wastewater with low fluoride content or wastewater whose fluoride concentration still cannot meet the relevant regulations after precipitation treatment, but the adsorption method has poor ability to remove fluoride ions and low efficiency

Method used

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  • Preparation method of sodium fluoride double-ion battery and its application in electrochemical defluorination
  • Preparation method of sodium fluoride double-ion battery and its application in electrochemical defluorination
  • Preparation method of sodium fluoride double-ion battery and its application in electrochemical defluorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] (1) The preparation of the nano-bismuth negative electrode material covered by carboxylated carbon nanotubes, the specific steps are as follows:

[0099] (1) Put 1.5g of carbon nanotubes in a round-bottomed flask, and add 100ml of a mixed solution of 98% concentrated sulfuric acid and 68% concentrated nitric acid in a volume ratio of 1:2 to the round bottom In the flask, carry out ultrasonic dispersion with a power of 300W for 10min; then carry out magnetic stirring with a rotating speed of 400r / min for 0.5h; Filtration), and washed with deionized water for many times until the pH was neutral to obtain filter cake A;

[0100] (2) drying the filter cake A obtained in step (1) at 60° C. for 1 h under vacuum and then grinding to obtain powder B;

[0101] (3) place powder B obtained in step (2) in a round-bottomed flask, add 120ml volume ratio: 1:2.5 mass fraction of 98% concentrated sulfuric acid and mass fraction of 36% hydrogen peroxide mixed solution, carry out 15min ...

Embodiment 2

[0118] (1) The preparation of the nano-bismuth negative electrode material coated with carboxylated carbon nanotubes, the specific steps are as follows:

[0119] (1) 2.5g of carbon nanotubes are placed in a round-bottomed flask, and 100ml of a volume ratio of 1:3 is a mixed solution of concentrated sulfuric acid with a mass fraction of 98% and concentrated nitric acid with a mass fraction of 68%. In the flask, perform ultrasonic dispersion with a power of 300W for 10min; then perform magnetic stirring at a speed of 1500r / min for 1h; dilute with a large amount (1000ml) of deionized water, filter under reduced pressure with 0.22μm filter paper after cooling, and wash with deionized water Repeatedly until the pH is neutral to obtain filter cake A;

[0120] (2) The filter cake A obtained in step (1) was vacuum-dried at 100°C for 2 hours, and then ground to obtain powder B;

[0121] (3) The powder B obtained in step (2) is placed in a round-bottomed flask, and 150ml of volume rati...

Embodiment 3

[0138] (1) The preparation of the nano-bismuth negative electrode material coated with carboxylated carbon nanotubes, the specific steps are as follows:

[0139] (1) 2.8g of carbon nanotubes are placed in a round bottom flask, and 200ml of a volume ratio of 1:4 is a mixed solution of concentrated sulfuric acid with a mass fraction of 98% and concentrated nitric acid with a mass fraction of 68%. In the flask, carry out ultrasonic dispersion with a power of 300W for 40 minutes; then carry out magnetic stirring at a speed of 2000r / min for 2 hours; dilute with a large amount (1000ml) of deionized water, filter under reduced pressure with 0.22μm filter paper after cooling, and wash with deionized water Repeatedly until the pH is neutral to obtain filter cake A;

[0140] (2) The filter cake A obtained in step (1) was vacuum-dried at 100°C for 3 hours, and then ground to obtain powder B;

[0141] (3) Place the powder B obtained in step (2) in a round-bottomed flask, add 150ml volume...

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Abstract

The invention discloses a preparation method of a sodium fluoride double-ion battery and its application in electrochemical defluorination. This sodium fluoride double-ion battery comprises sodium ion electrochemical material, fluorine ion electrochemical material and electrolytic solution; Described sodium ion electrode material comprises Na 0.44 MnO 2 , Na 2 FeP 2 o 7 , Na 2 V 6 o 16 , NaTi 2 (PO 4 ) 3 , Na 0.44 [Mn 1‑x Tix]O 2 etc.; fluoride ion electrochemical materials include electrochemical materials or electrochemical materials coated with carbon materials; wherein, electrochemical materials include Bi, BiF3, Pb, PbF2, piperidine inorganic substances, bipyridylium salts, etc.; the electrolyte is NaF solution. The sodium fluoride dual-ion battery in the present invention has high specific capacity and good cycle performance; at the same time, in the process of charging and discharging, the fluoride ion electrode material can use the electrochemical fluoride ion adsorption to remove the fluoride ion in the solution, and can be applied to the battery containing Fluoride wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of new energy and new materials, and particularly relates to a preparation method of a sodium fluoride double-ion battery and its application in electrochemical defluorination. Background technique [0002] Water is an important and indispensable substance for human survival. Despite the abundance of water resources on the earth, due to the limited and uneven distribution of freshwater resources, the rapid population growth and the continuous increase of industrial and agricultural water consumption, the phenomenon of water shortage in many areas is still very serious. Although the water on earth is renewable and continuously circulating, the water quality is deteriorating due to the increasing environmental pollution. The global water crisis has brought great harm to human beings. Water pollution is the reduction or loss of use value of water caused by harmful chemicals. Water pollution can be divided in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M10/38C02F1/461C02F101/14
CPCC02F1/46109C02F2001/46133C02F2101/14H01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 陈福明胡晓乔张子帅侯贤华
Owner SOUTH CHINA NORMAL UNIVERSITY
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