Method of making copper sulfide electrode material

Patent metadata

Field	Value
Publication number	US-11629061-B1
Application number	US-202217875703-A
Country	US
Kind code	B1
Filing date	Jul 28, 2022
Priority date	Jan 13, 2022
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

A method of making copper sulfide electrode material comprising steps of: 1) stirring and dissolving copper(ii) nitrate hydrate (Cu(NO 3 )2.3H 2 O) and Thiourea (CH 4 N 2 S) in a mixed solution consisting of ethylene glycol and deionized water; 2) adding hexadecyl trimethyl ammonium bromide (C 19 H 42 N.Br) to mixture A; 3) placing the mixture B into a roaster, raising a temperature of the roaster to 100° C. to 180° C. for 10 hours to 18 hours; 4) washing the crude CuS by using a mixed fluid of ethanol absolute (C 2 H 6 O) and deionized water to be cooled in a room temperature, placing the crude CuS in the roaster and raising a temperature of the roaster to 50° C. to 80° C.; 5) producing cathode electrode of asymmetric capacitive deionization module by using the copper sulfide electrode material; 6) producing anode electrode of asymmetric capacitive deionization module by using activated carbon electrode material.

First claim

What is claimed is:

1. A method of making copper sulfide electrode material comprising steps of:
1) stirring and dissolving copper(ii) nitrate hydrate (C(NO 3 ) 2 .3H 2 O) and Thiourea (CH 4 N 2 S) in a mixed solution consisting of ethylene glycol and deionized water, wherein a molar ratio of the C(NO 3 ) 2 .3H 2 O and the CH 4 N 2 S is 1:2.5, the mixed solution consists of 10 mL ethylene glycol and 30 mL deionized water, thus producing a mixture A;
2) adding hexadecyl trimethyl ammonium bromide (C 19 H 42 N.Br) to the mixture A, wherein a stirring time of the mixture A and the C 19 H 42 N.Br is 5 minutes to 50 minutes to obtain a mixture B;
3) placing the mixture B into a roaster, raising a temperature of the roaster to 100° C. to 180° C. so that the mixture B reacts in the roaster to produce crude copper sulfide (CuS) after 10 hours to 18 hours;
4) washing the crude CuS by using a mixed fluid of ethanol absolute (C 2 H 6 O) and deionized water, wherein the crude CuS is cooled in a room temperature and is placed in the roaster, and a temperature of the roaster is raised within 50° C. to 80° C. so as to dry the crude CuS within 3 hours to 24 hours, thus producing the copper sulfide electrode material;
5) producing cathode electrode of asymmetric capacitive deionization module by using the copper sulfide electrode material;
6) producing anode electrode of the asymmetric capacitive deionization module by using activated carbon electrode material; and
7) connecting current collector a, first titanium strip b, the cathode electrode c of copper sulfide, non-woven fabric d, silicone gasket e, non-woven fabric d, and the anode electrode c′ of activated carbon, a second titanium strip b and a second current collector a in sequence from left to right to produce the asymmetric capacitive deionization module.

2. The method as claimed in claim 1 , wherein in the step 5), the copper sulfide electrode material of the step 4) is an active substance, and the active substance of the copper sulfide electrode material is mixed with conductive carbon black evenly, wherein a quantity ratio of the copper sulfide electrode material and the conductive carbon black is 10:1 to 7:1, the C 2 H 6 O is added to and is stirred with the active substance of the copper sulfide electrode material and the conductive carbon black, and a binder is added to and stirred with the C 2 H 6 O, the active substance and the conductive carbon black, wherein a quantity ratio of the copper sulfide electrode material and the binder is 10:1 to 7:1, and the binder is a mixed fluid made by a quantity ratio of 6:1 to 2:1 of polyvinyl butyral and polyvinylpyrrolidone;
wherein a mixture of the binder, the C 2 H 6 O, the active substance of the copper sulfide electrode material and the conductive carbon black are coated on a graphite paper, and a coating thickness of the mixture of the binder, the C 2 H 6 O, the active substance of the copper sulfide electrode material and the conductive carbon black is 100 μm to 600 μm, and the graphite paper on which the mixture of the binder, the C 2 H 6 O, the active substance of the copper sulfide electrode material and the conductive carbon black are coated, is dried in a temperature of 40° C. to 80° C. for 2 hours to 24 hours.

3. The method as claimed in claim 2 , wherein a quantity ratio of the copper sulfide electrode material and the binder is 8:1.

4. The method as claimed in claim 1 , wherein in the step 6), the C 2 H 6 O is added to and mixed with a mixture of activated carbon and conductive carbon black, and a binder is added to and stirred with the mixture of activated carbon and conductive carbon black and the C 2 H 6 O, wherein the binder is a mixed fluid made by a quantity ratio of 2:1 to 6:1 of polyvinyl butyral and polyvinylpyrrolidone;
wherein a mixture of the binder, the C 2 H 6 O, and the mixture of activated carbon and conductive carbon black is coated on a graphite paper, a coating thickness of the mixture of the binder, the C 2 H 6 O, and the active substance is 100 μm to 600 μm, and the graphite paper is dried in a temperature of 40° C. to 80° C. for 2 hours to 24 hours, thus producing a treated material obtained after mixing activated carbon, conductive carbon black, the binder, and C 2 H 6 O which, and the treaded material is the anode electrode of activated carbon.

5. The method as claimed in claim 4 , the step 7) further comprising connecting the asymmetric capacitive deionization module, a peristaltic pump, and a copper-containing waste liquid via a hose, wherein the copper-containing waste liquid is pumped into a channel between the cathode electrode and the anode electrode by the peristaltic pump, the asymmetric capacitive deionization module is powered by the peristaltic pump, under an action of voltage, anions and cations in the solution are adsorbed to the anode electrode and the cathode electrode respectively, and 1 mol/L hydrochloric acid is configured to adjust a pH value of the copper-containing waste liquid, wherein the pH value of the copper-containing waste liquid is controlled within 1.5 to 4.5, a voltage of power supply is set at 0V to 1.4V, and an absorbing time is set 5 min to 360 min, thus extracting copper ions.

6. The method as claimed in claim 5 , wherein the flow speed of the peristaltic pump is controlled at 10 mL/min, the voltage of power supply is set at 1V, and an absorbing time is set at 180 min.

Assignees

• Univ Dongguan Technology

Inventors

• Wang Gang
• Zhuang Haohong
• Wang Shiyong
• Lu Sihao

Classifications

• C02F2101/20

  Heavy metals or heavy metal compounds · CPC title

• C02F2001/46138

  Electrodes comprising a substrate and a coating · CPC title

• C02F1/4691

  Capacitive deionisation · CPC title

• C02F1/46109 Primary

  Electrodes · CPC title

• Y02P10/20

  Recycling · CPC title