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

An electrochemical and dual-ion technology, applied in electrochemical generators, chemical instruments and methods, secondary batteries, etc., can solve the problems of poor ability to remove fluoride ions and low efficiency

Active Publication Date: 2018-09-04
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 m

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0099] (1) 1.5g of carbon nanotubes are placed in a round-bottomed flask, and 100ml of a volume ratio of 1:2 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 the ultrasonic dispersion that 10min power is 300W; Carry out 0.5h rotating speed again and be the magnetic son stirring of 400r / min; Dilute with 1000ml deionized water, filter under reduced pressure with the filter paper of 0.22 μm after cooling (use suction filter to depressurize filter), and washed with deionized water several times until the pH is neutral to obtain filter cake A;

[0100] (2) The filter cake A obtained in step (1) was vacuum-dried at 60°C for 1 hour, and then ground to obtain powder B;

[0101] (3) The powder B obtained in step (2) is plac...

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 dual-ion battery and application of sodium fluoride dual-ion battery in electrochemical defluorination. The sodium fluoride dual-ion battery comprises a sodium ion electrochemical material, a fluorine ion electrochemical material and electrolyte, wherein the sodium ion electrochemical material is prepared from Na0.44MnO2, Na2FeP2O7,Na2V6O16, NaTi2(PO4)3, Na0.44[Mn1-xTix]O2 and the like; the fluorine ion electrochemical material comprises an electrochemical material or the electrochemical material coated by a carbon material; the electrochemical material is prepared from Bi, BiF3, Pb, PbF2, piperidines inorganic matters, dipyridyl onium salt and the like; an NaF solution is used as the electrolyte. The sodium fluoride dual-ion battery in the invention is high in specific capacity and good in cycle performance; meanwhile, fluorine ions in a solution can be removed by a fluorine ion electrode material by utilizing electrochemical fluoride ion adsorptivity during a charging-discharging process, and the sodium fluoride dual-ion battery can be applied to treatment of sewage containing fluoride.

Description

technical field [0001] The invention belongs to the technical field of new energy and new materials, and in particular 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 material for human beings to survive. Although the earth is rich in water resources, due to the limited and uneven distribution of fresh water resources, rapid population growth and increasing industrial and agricultural water consumption, the phenomenon of water shortage in many areas is still very serious. Although the water on the earth is renewable and continuously recycled, due to the increasingly serious environmental pollution, the water quality is deteriorating day by day. The global water resource crisis has brought great harm to human beings. Water pollution is the reduction or loss of water use value caused by harmful chemicals. Water pollution can be...

Claims

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Application Information

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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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