최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기주관연구기관 | 한국원자력연구원 Korea Atomic Energy Research Institute |
---|---|
연구책임자 | 신준화 |
참여연구자 | 손준용 , 송주명 , 최지선 , 박병희 , 우현수 , 송송이 , 황미림 , 이지홍 , 이선영 |
보고서유형 | 1단계보고서 |
발행국가 | 대한민국 |
언어 | 한국어 |
발행년월 | 2015-03 |
과제시작연도 | 2014 |
주관부처 | 미래창조과학부 Ministry of Science, ICT and Future Planning |
등록번호 | TRKO201800009523 |
과제고유번호 | 1711011028 |
사업명 | 방사선기술개발사업 |
DB 구축일자 | 2018-05-26 |
키워드 | 방사선 가교.방사선 그라프팅.멤브레인.고온.저가습.연료전지.Radiation Crosslinking.Radiation Grafting.Membrane.High Temperature.Low Humidity.Fuel Cell. |
DOI | https://doi.org/10.23000/TRKO201800009523 |
○ 방사선 가교/그라프팅 기술 및 나노입자 도입을 통한 고온 저가습 연료전지용 멤브레인 제조 기술 개발
- 본 과제에서는 고온에서 멤브레인의 안정성을 유지하기 위한 방사선 가교, 고온 저가습 조건에서 멤브레인의 수분을 유지하기 위한 나노입자 도입, 방사선 그라프팅 방법을 이용한 소수성 불소계 다공성 지지체 친수화, 친수성 고분자 전해질 및 나노입자함침 연구를 통해 고온 저가습 연료전지용 멤브레인을 제조하였음. 제조된 멤브레인은 고온 저가습 조건에서의 치수안정성이 향상되었으며 수소이온전도도는 최대 200배 향상되었음.
-
○ 방사선 가교/그라프팅 기술 및 나노입자 도입을 통한 고온 저가습 연료전지용 멤브레인 제조 기술 개발
- 본 과제에서는 고온에서 멤브레인의 안정성을 유지하기 위한 방사선 가교, 고온 저가습 조건에서 멤브레인의 수분을 유지하기 위한 나노입자 도입, 방사선 그라프팅 방법을 이용한 소수성 불소계 다공성 지지체 친수화, 친수성 고분자 전해질 및 나노입자함침 연구를 통해 고온 저가습 연료전지용 멤브레인을 제조하였음. 제조된 멤브레인은 고온 저가습 조건에서의 치수안정성이 향상되었으며 수소이온전도도는 최대 200배 향상되었음.
- 제조된 멤브레인의 모폴로지, 나노입자 도입 및 수분 증발에 따른 멤브레인의 이온회합체 및 cluster network 변화는 SEM-EDX, XRD, DMA, DSC 및 SAXS 등의 분석기기를 이용하여 관찰하고 분석하였음.
- 제조된 멤브레인을 적용한 단위전지셀(MEA)을 제작하여 고온 저가습(120 ℃, 50% 습도) 조건에서 구동시킨 결과, 최대전력밀도 630 mW/cm2, 전류밀도(0.6 V 기준) 629mA/cm2 성능을 보여 고온 저가습 연료전지용 멤브레인으로의 활용 가능성을 검증하였음.
( 출처 : 보고서 요약서 3p )
Ⅳ. The results of the R&D accomplishment
○ Fundamental study for the preparation of the fuel cell membrane for high temperature and low humidity by radiation
• The crosslinked SPEEK hydrocarbon membrane with thermal stability for high temperature fuel cell membrane was prepared using electron
Ⅳ. The results of the R&D accomplishment
○ Fundamental study for the preparation of the fuel cell membrane for high temperature and low humidity by radiation
• The crosslinked SPEEK hydrocarbon membrane with thermal stability for high temperature fuel cell membrane was prepared using electron beam and crosslinker (butanediol, DVE/TAIC, PVDF/TAIC, etc.). Also, the utilization of the prepared membrane at high temperature was confirmed by the measurement of gel fraction, water uptake, dimension stability, and thermal analysis (TGA and DMA etc).
• In order to maintain the ion conductivity of the membrane under low humidity condition, the crystalline ZrP and porous HPW/Silica nanoparticle to be added were prepared, and their morphologies and structures were investigated using XRD and SAXS. The studied for the introduction of nanoparticle into the crosslinked SPEEK membrane through mixing method and substitution method were carried out.
• In the reinforced composite membranes for fuel cells with excellent mechanical properties and dimensional stability, we have studied the hydrophilization of the hydrophobic surface of porous substrate using a radiation grafting method to impregnate the hydrophilic polymer electrolyte and to improve the interfacial compatibility between substrate and polymer electrolyte. The PTFE and PVDF were used as the porous substrate and the hydrophilized porous substrates were prepared using a hydrophilic monomer (acrylic acid, polystyrene sulfonic acid, sodium allyl sulfonate, sodium vinyl sulfonate).
• The radiation effect of the porous substrate hydrophilized by radiation grafting method was evaluated by the degree of grafting, contact angle, Gurley number, and SEM analysis. The conditions for impregnating the hydrophilic SPEEK and Nafion into the substrate has been established.
○ Development of the fuel cell membrane for high temperature and low humidity by radiation
• The crosslinked nanocomposite membranes were prepared by the introduction of nanoparticles (crystalline α-zirconium phosphate and tungsten phosphate/silane) and radiation crosslinking. The reinforced nanocomposite membrane was fabricated by introducing hydrophilic polymer electrolyte and nonoparticle (ZrP) into the porous substrate hydrophilized by a radiation grafting method. The performance of the prepared membranes was evaluated under high temeprature and low humidity condition.
• The crosslinked nanocomposite membrane at a dose of 300 kGy was found to have over 1.5 meq/g of ion exchange capacity (target: 1.2 meq/g), over 90% gel fraction (target: 80%), and over 50 MPa mechanical strength(target: 40 MPa) respectively. The proton conductivity of crosslinked nanocomposite membrane was also measured to be 200 mS/cm under fully humidified condition. In addition, it was confirmed that the proton conductivity at high temperature and low humidity condition was increased from 20 times (α-ZrP, mixture method) to 200 times (ZrP, substitute method).
• It was confirmed that the reinforced nanocomposite membrane prepared by the introduction of ZrP has below 15% water contents (target value: 40%) and the improved dimensional stability. In addition, it was confirmed that the reinforced nanocomposite membrane shows a high proton conductivity(70 mS/cm) at high temperature and low humidity (120 ℃, relative humidity 35%) conditions compared to that of the membrane without nanoparticles. This means that the water content, dimensional stability, and proton conductivity were greatly improved by the introduction of ZrP nano particle and the use of porous substrate.
• The water evaporation rate of the prepared substrate was observed by a small-angle X-ray scattering analysis. It was confirmed that the water evaporation rate was remarkably decreased by the introduction of nano particle.
○ Preparation of membrane-electrode assembly using the fuel cell membranes for high temperature and low humidity and their evaluation of fuel cell performance
• The optimal MEA fabrication condition (MEA dimension: 5 cm2, hot pressing temperature: 100 ℃, pressure: 120 kgf/cm², time: 3 minutes) using the fuel cell membrane for high temperature and low humidity was established and fuel cell performance was evaluated. During the fuel cell test, oxygen and hydrogen were introduced into the positive and negative electrodes, respectively. The relative humidity was set to be 50% and the temperature was varied.
• The fuel cell performance test results indicated that PTFE-g-PAA/Nafion-ZrP (16 wt%) fabricated with Pt black catalyst (2 mg/cm2) and 60 wt% ionomer showed the highest performance at a 120 ℃, 50% relative humidity, and 10 psi pressure condition.
• Fuel cell performance of the membrane at high temperature and low humidity conditions
Membrane: PTFE-g-PAA/Nafion-ZrP (16 wt% ZrP)
MEA condition: ionomer 60 wt%, 120 ℃, 50% RH, 40 psi
Maximum power density: 630 mW/cm2 (target : 300 mW/cm2)
Current density (at 0.6 V): 629 mA/cm2 (target : 200 mA/cm2)
( 출처 : SUMMARY 9p )
과제명(ProjectTitle) : | - |
---|---|
연구책임자(Manager) : | - |
과제기간(DetailSeriesProject) : | - |
총연구비 (DetailSeriesProject) : | - |
키워드(keyword) : | - |
과제수행기간(LeadAgency) : | - |
연구목표(Goal) : | - |
연구내용(Abstract) : | - |
기대효과(Effect) : | - |
Copyright KISTI. All Rights Reserved.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.