KR102335259B1 - 연신을 통한 레독스 흐름 전지용 분리막의 제조방법 및 그로부터 제조되는 레독스 흐름 전지용 분리막 - Google Patents
연신을 통한 레독스 흐름 전지용 분리막의 제조방법 및 그로부터 제조되는 레독스 흐름 전지용 분리막 Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 239000005518 polymer electrolyte Substances 0.000 claims abstract description 46
- 239000003792 electrolyte Substances 0.000 claims abstract description 44
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 229910052720 vanadium Inorganic materials 0.000 claims description 25
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 25
- 229920000557 Nafion® Polymers 0.000 claims description 21
- 229910001456 vanadium ion Inorganic materials 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- 230000035699 permeability Effects 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 13
- -1 hydrogen ions Chemical class 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- ZRXYMHTYEQQBLN-UHFFFAOYSA-N [Br].[Zn] Chemical compound [Br].[Zn] ZRXYMHTYEQQBLN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 229910003106 Zn-Br Inorganic materials 0.000 claims description 2
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 7
- 230000001976 improved effect Effects 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 5
- 229920000554 ionomer Polymers 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000011056 performance test Methods 0.000 description 3
- 238000000235 small-angle X-ray scattering Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 150000003460 sulfonic acids Chemical class 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000001797 two-dimensional small-angle X-ray scattering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000001586 synchrotron small angle X-ray scattering Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/1069—Polymeric electrolyte materials characterised by the manufacturing processes
- H01M8/1086—After-treatment of the membrane other than by polymerisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M8/00—Fuel cells; Manufacture thereof
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- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/1023—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes
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- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
- H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
- H01M8/1032—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having sulfur, e.g. sulfonated-polyethersulfones [S-PES]
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- H01M8/184—Regeneration by electrochemical means
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Abstract
Description
도 2는 본원 발명의 일 구현예에 따른 서로 다른 변형율에 의한 고분자 전해질 막의 2차원 SAXS 패턴을 나타낸 것이다.
도 3은 본원 발명의 일 구현예에 따른 고분자 전해질 막의 (a) 변형율에 의한 in-plane과 through-plane의 수소이온 전도도와 비대칭성, (b) 완전히 수화된 조건에서 고분자 전해질 막의 면 저항을 나타낸 것이다.
도 4는 본원 발명의 일 구현예에 따른 고분자 전해질 막의 (a) 막을 투과한 VO2+의 농도, (b) 변형율에 대한 투과도를 나타낸 것이다.
도 5는 본원 발명의 일 구현예에 따른 고분자 전해질 막을 분리막으로 포함하는 레독스 흐름전지의 (a) 쿨롬 효율(Coulombic efficiency: CE)과 전압 효율(voltage efficiency: VE), (b) 에너지 효율(energy efficiency: EE)을 나타낸 것이다.
도 6은 본원 발명의 일 구현예에 따른 고분자 전해질 막를 분리막으로 포함하는 레독스 흐름전지의 충-방전 곡선(charge-discharge curve)를 나타낸 것이다.
도 7은 본원 발명의 일 구현예에 따른 고분자 전해질 막을 분리막으로 포함하는 레독스 흐름전지의 자기-방전 곡선(charge-discharge curve)를 나타낸 것이다.
σz (S/cm) |
D H (m2/s) |
P V (m2/s) |
α/αNafion115 | |
Nafion 115 | 0.052 | 6.31×10-10 | 5.06×10-13 | 1 |
N0.9 | 0.044 | 5.36×10-10 | 3.12×10-13 | 1.38 |
N1.9 | 0.035 | 4.27×10-10 | 2.19×10-13 | 1.56 |
N2.6 | 0.031 | 3.79×10-10 | 1.78×10-13 | 1.71 |
Claims (12)
- 수소이온 전도도를 가지는 고분자 전해질 막을 준비하는 전해질 막 준비단계; 및
상기 전해질 막을 연신하는 전해질 막 연신단계를 포함하되,
상기 전해질막 연신단계는 승온된 조건에서 전해질 막을 1 내지 3의 변형율(strain)로 일축 연신하여,
전해질 막의 프로톤 전도도 비대칭성이 하기 식을 만족하고,
1.0 < σx /σy < 2.0
(단, 여기서 σx는 전해질 막의 연신 방향과 평행한 방향의 프로톤 전도도이고, σy는 전해질 막의 연신 방향과 직교하는 면방향의 프로톤 전도도임)
VO2+의 투과도(permeability)가 1.7×10-13 내지 3.2×10-13 m2/s인 것을 특징으로 하는 레독스 흐름 전지용 분리막의 제조방법. - 청구항 1에 있어서,
상기 수소이온 전도도를 가지는 고분자 전해질 막은 과불소계 고분자 또는 탄화수소계 고분자인 것을 특징으로 하는 레독스 흐름 전지용 분리막의 제조방법. - 청구항 1에 있어서,
상기 수소이온 전도도를 가지는 고분자는 술폰산기를 함유하는 것을 사용하는 것을 특징으로 하는 레독스 흐름 전지용 분리막의 제조방법. - 청구항 1에 있어서,
상기 고분자 전해질 막은 나피온인 것을 특징으로 하는 레독스 흐름 전지용 분리막의 제조방법. - 삭제
- 삭제
- 삭제
- 삭제
- 청구항 9에 있어서,,
상기 분리막은 완전히 수화되었을 때 면저항(areal resistance)이 0.245 내지 0.255 Ωcm2인 것을 특징으로 하는 레독스 흐름 전지용 분리막. - 양극 및 양극 전해질을 포함하는 양극셀;
음극 및 음극 전해질을 포함하는 음극셀; 및
상기 양극셀과 음극셀 사이에 위치하는 청구항 9에 기재된 레독스 흐름 전지용 분리막을 포함하는 것을 특징으로 하는 레독스 흐름전지. - 청구항 11에 있어서,
상기 레독스 흐름 전지는 바나듐 레독스 흐름 전지(vanadium RFB: VRFB) 또는 아연-브롬 레독스 흐름 전지(zinc-bromine RFB: Zn-Br RFB) 중 어느 하나인 것을 특징으로 하는 레독스 흐름전지.
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