Capacitive deionization electrodes, capacitive deionization apparatuses including the same, and production methods thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-001/461
C02F-001/469
C25B-011/12
출원번호
US-0573522
(2014-12-17)
등록번호
US-9758391
(2017-09-12)
우선권정보
KR-10-2013-0162971 (2013-12-24)
발명자
/ 주소
Yang, Yoo Seong
Kim, Jae Eun
Kim, Hyun Seok
Lee, Seung Jae
Kang, Hyo Rang
Jeong, Joon Seon
출원인 / 주소
Samsung Electronics Co., Ltd.
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
0인용 특허 :
14
초록
A capacitive deionization electrode may include a conductive material and a polymer on a surface of the conductive material. The polymer may have at least one functional group in a single polymer chain.
대표청구항▼
1. A capacitive deionization electrode comprising: a conductive material including a carbon material, the carbon material including activated carbon, the activated carbon including aluminum (Al) in an amount of about 5 to 30 wt % and silicon in an amount of about 15 to 20 wt % based on a total amoun
1. A capacitive deionization electrode comprising: a conductive material including a carbon material, the carbon material including activated carbon, the activated carbon including aluminum (Al) in an amount of about 5 to 30 wt % and silicon in an amount of about 15 to 20 wt % based on a total amount of substances included therein other than carbon; anda polymer on a surface of the conductive material, the polymer having at least one functional group in a single polymer chain. 2. The capacitive deionization electrode of claim 1, wherein the conductive material further comprises a porous material selected from TiO2, TiN, SiO2, and Si3N4; a conductive metal oxide; or a combination thereof. 3. The capacitive deionization electrode of claim 2, wherein the carbon material further comprises at least one selected from carbon nanotubes, carbon aerogel, mesoporous carbon, and graphite oxide. 4. The capacitive deionization electrode of claim 1, wherein the activated carbon has a specific surface area of greater than or equal to about 900 m2/g and an average particle size of less than or equal to about 100 μm. 5. The capacitive deionization electrode of claim 1, further comprising: an electrically conducting agent and a binder. 6. The capacitive deionization electrode of claim 5, wherein the electrically conducting agent is selected from carbon black, vapor growth carbon fiber (VGCF), natural graphite, artificial graphite, acetylene black, ketjen black, or a carbon fiber; a metallic powder or fiber of copper, nickel, aluminum, or silver; conductive polymers; and a mixture thereof, and the binder optionally comprises an anion exchange group or a cation exchange group, and the binder comprises a hydrophilic polymer selected from a polyacrylic acid, a poly(acrylic acid-maleic acid) copolymer, polyvinyl alcohol, cellulose, polyvinylamine, chitosan, polyacrylamide, a poly(acrylamide-acrylic acid) copolymer, a poly(styrene-acrylic acid) copolymer, and a combination thereof; or a hydrophobic polymer selected from polystyrene, polyvinylchloride, carboxylated polyvinylchloride, polyvinylfluoride, a polyamide, polyvinylpyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, a styrene-butadiene rubber, an acrylated styrene-butadiene rubber, an epoxy resin, and a combination thereof; or a combination thereof. 7. The capacitive deionization electrode of claim 1, wherein the polymer is part of a coating on the surface of the conductive material. 8. The capacitive deionization electrode of claim 1, wherein the polymer comprises 1 to 10 functional groups selected from a carboxyl group (—COOH), —NO2, N, an ammonium salt group (—NR3+), a phosphate group (PO43−), a sulfonic acid salt group, and a hydroxyl group. 9. The capacitive deionization electrode of claim 1, wherein the polymer comprises a polyester repeating unit, a polyether repeating unit, an alkyl moiety, a polyaminoamide repeating unit, a polyurethane repeating unit, or a combination thereof. 10. The capacitive deionization electrode of claim 1, wherein the polymer comprises a branched polymer having a functional group at a terminal end thereof. 11. The capacitive deionization electrode of claim 1, wherein the polymer has a weight average molecular weight of greater than or equal to about 100,000. 12. The capacitive deionization electrode of claim 1, wherein the polymer has an acid value of greater than or equal to about 30 mg KOH/g and an amine value of greater than or equal to about 30 mg KOH/g. 13. A method of producing a capacitive deionization electrode, comprising: obtaining a binder solution including an electrically conducting agent and a binder;preparing either a conductive material having a polymer coated on a surface thereof or an aqueous dispersion including the conductive material and the polymer, the polymer having at least one functional group in a single polymer chain, the conductive material including a carbon material, the carbon material including activated carbon, the activated carbon including aluminum (Al) in an amount of about 5 to 30 wt % and silicon in an amount of about 15 to 20 wt % based on a total amount of substances included therein other than carbon;mixing the binder solution with the aqueous dispersion or the conductive material to obtain a slurry; andapplying the slurry on an electrically conducting support. 14. The method of claim 13, wherein the conductive material further comprises a porous material selected from TiO2, TiN, SiO2, and Si3N4; a conductive metal oxide; or a combination thereof. 15. The method of claim 13, wherein the carbon material further comprises at least one selected from carbon nanotubes, carbon aerogel, mesoporous carbon, and graphite oxide. 16. The method of claim 13, wherein the preparing comprises ultra-sonicating the aqueous dispersion to form a coating of the polymer on the conductive material; and separating the conductive material with the coating from the aqueous dispersion. 17. The method of claim 13, wherein the polymer comprises 1 to 10 functional groups selected from a carboxyl group (—COOH), —NO2, N, an ammonium salt group (—NR3+), a phosphate group (PO43−), a sulfonic acid salt group, and a hydroxyl group. 18. The method of claim 13, wherein the polymer comprises a polyester repeating unit, a polyether repeating unit, an alkyl moiety, a polyaminoamide repeating unit, a polyurethane repeating unit, or a combination thereof. 19. The method of claim 13, wherein the polymer comprises a branched polymer having a functional group at a terminal end thereof. 20. A capacitive deionization apparatus comprising: a pair of capacitative electrodes having a flow path therebetween, each of the electrodes including a conductive material and a polymer on a surface of the conductive material, the polymer having at least one functional group in a single polymer chain, the conductive material including a carbon material, the carbon material including activated carbon, the activated carbon including aluminum (Al) in an amount of about 5 to 30 wt % and silicon in an amount of about 15 to 20 wt % based on a total amount of substances included therein other than carbon, anda power source to apply voltage to the electrodes. 21. The capacitive deionization apparatus of claim 20, wherein the conductive material further comprises a porous material selected from TiO2, TiN, SiO2, and Si3N4; a conductive metal oxide; or a combination thereof. 22. The capacitive deionization apparatus of claim 20, wherein the polymer is part of a coating on the surface of the conductive material. 23. The capacitive deionization apparatus of claim 20, wherein the polymer comprises 1 to 10 functional groups selected from a carboxyl group (—COOH), —NO2, N, an ammonium salt group (—NR3+), a phosphate group (PO43−), a sulfonic acid salt group, and a hydroxyl group. 24. The capacitive deionization apparatus of claim 20, wherein the polymer comprises a branched polymer having a functional group at a terminal end thereof.
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