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Impure Water Electrolysis for Hydrogen and Oxygen Generation Using Bipolar Membrane Electrode Assemblies
Impure Water Electrolysis for Hydrogen and Oxygen Generation Using Bipolar Membrane Electrode Assemblies
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105624
- ISBN
- 9798265427724
- DDC
- 536
- 서명/저자
- Impure Water Electrolysis for Hydrogen and Oxygen Generation Using Bipolar Membrane Electrode Assemblies
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 157 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Jaramillo, Thomas.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Bipolar membranes (BPMs) have traditionally been used for acid-base generation in electrodialysis, but their unique ability to maintain distinct pH properties at the local level, has recently attracted interest in other electrochemical applications. This feature presents opportunities for unconventional applications such as impure water electrolysis. In this study, we investigate the feasibility and performance of BPM-based electrolyzers supplied with impure water feedstocks. Traditional electrolyzers require highly purified feed streams to avoid degradation, efficiency losses, and the risk of forming hazardous byproducts. Operating electrolyzers with untreated water sources could make hydrogen (H2) and oxygen (O2) generation more accessible, especially in remote or resource-limited regions. Here, we demonstrate that BPM-enabled systems can sustain electrolysis in the presence of unpurified water sources. In the first application, BPMs supported extended operation in seawater, lasting up to 140X longer than conventional proton exchange membrane (PEM) systems under similar conditions. We quantified sodium and chloride ion crossover, monitored anodic chloride oxidation, and evaluated energy efficiency under these harsh conditions. In the second application, we broadened the scope to include a wider concentration range of salt containing feedstocks. By applying an integrated reference electrode strategy, we resolved component specific performance metrics within the electrolyzer device and identified sensitivities across varying NaCl concentrations. These measurements provided fundamental insights into membrane and electrode behavior in complex environments, informing pathways to enhanced ion tolerance and overall electrochemical performance. In the final part of this work, we applied these earlier findings to develop practical design strategies for improving BPMWE performance and durability during high-current operation. Our approach focused on reducing voltage losses, improving overall cell performance, and extending device lifetime in the presence impurities. We tested the impact of cation selection, which resulted in decreased voltage sensitivity for the anode, forward-bias mode which seemed to circumvent mass transport limitations and tested novel BPM designs to enable longer stability in 0.5 M NaCl. Overall, our goal is to show that combining fundamental insights with device-level testing can lead to robust BPMs under operation with impurity rich streams.
- 일반주제명
- Thermodynamics
- 일반주제명
- Electrodes
- 일반주제명
- High temperature
- 일반주제명
- Hydrogen
- 일반주제명
- Decomposition
- 일반주제명
- Energy
- 일반주제명
- Chromatography
- 일반주제명
- Chlorine
- 일반주제명
- Membranes
- 일반주제명
- Polymers
- 일반주제명
- Electrolytes
- 일반주제명
- Poisoning
- 일반주제명
- Oxidation
- 일반주제명
- Fossil fuels
- 일반주제명
- Electric fields
- 일반주제명
- Water resources
- 일반주제명
- Carbon dioxide
- 일반주제명
- Seawater
- 일반주제명
- Salinity
- 일반주제명
- Organic contaminants
- 일반주제명
- Medical imaging
- 일반주제명
- Polymer chemistry
- 일반주제명
- Electromagnetics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105624
■006m o d
■007cr#unu||||||||
■020 ▼a9798265427724
■035 ▼a(MiAaPQ)AAI32316530
■035 ▼a(MiAaPQ)Stanfordmx084tg4949
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a536
■1001 ▼aMarin, Daniela H.
■24510▼aImpure Water Electrolysis for Hydrogen and Oxygen Generation Using Bipolar Membrane Electrode Assemblies
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a157 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Jaramillo, Thomas.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aBipolar membranes (BPMs) have traditionally been used for acid-base generation in electrodialysis, but their unique ability to maintain distinct pH properties at the local level, has recently attracted interest in other electrochemical applications. This feature presents opportunities for unconventional applications such as impure water electrolysis. In this study, we investigate the feasibility and performance of BPM-based electrolyzers supplied with impure water feedstocks. Traditional electrolyzers require highly purified feed streams to avoid degradation, efficiency losses, and the risk of forming hazardous byproducts. Operating electrolyzers with untreated water sources could make hydrogen (H2) and oxygen (O2) generation more accessible, especially in remote or resource-limited regions. Here, we demonstrate that BPM-enabled systems can sustain electrolysis in the presence of unpurified water sources. In the first application, BPMs supported extended operation in seawater, lasting up to 140X longer than conventional proton exchange membrane (PEM) systems under similar conditions. We quantified sodium and chloride ion crossover, monitored anodic chloride oxidation, and evaluated energy efficiency under these harsh conditions. In the second application, we broadened the scope to include a wider concentration range of salt containing feedstocks. By applying an integrated reference electrode strategy, we resolved component specific performance metrics within the electrolyzer device and identified sensitivities across varying NaCl concentrations. These measurements provided fundamental insights into membrane and electrode behavior in complex environments, informing pathways to enhanced ion tolerance and overall electrochemical performance. In the final part of this work, we applied these earlier findings to develop practical design strategies for improving BPMWE performance and durability during high-current operation. Our approach focused on reducing voltage losses, improving overall cell performance, and extending device lifetime in the presence impurities. We tested the impact of cation selection, which resulted in decreased voltage sensitivity for the anode, forward-bias mode which seemed to circumvent mass transport limitations and tested novel BPM designs to enable longer stability in 0.5 M NaCl. Overall, our goal is to show that combining fundamental insights with device-level testing can lead to robust BPMs under operation with impurity rich streams.
■590 ▼aSchool code: 0212.
■650 4▼aThermodynamics
■650 4▼aElectrodes
■650 4▼aNuclear magnetic resonance--NMR
■650 4▼aHigh temperature
■650 4▼aHydrogen
■650 4▼aDecomposition
■650 4▼aEnergy
■650 4▼aChromatography
■650 4▼aResearch & development--R&D
■650 4▼aChlorine
■650 4▼aMembranes
■650 4▼aPolymers
■650 4▼aElectrolytes
■650 4▼aPoisoning
■650 4▼aOxidation
■650 4▼aFossil fuels
■650 4▼aElectric fields
■650 4▼aWater resources
■650 4▼aCarbon dioxide
■650 4▼aSeawater
■650 4▼aSalinity
■650 4▼aOrganic contaminants
■650 4▼aMedical imaging
■650 4▼aPolymer chemistry
■650 4▼aElectromagnetics
■690 ▼a0791
■690 ▼a0348
■690 ▼a0574
■690 ▼a0495
■690 ▼a0607
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360818▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


