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Atomistic Modeling and Machine Learning for the Rational Design of Organic Energy Storage Materials
Atomistic Modeling and Machine Learning for the Rational Design of Organic Energy Storage Materials
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105515
- ISBN
- 9798263337735
- DDC
- 600
- 저자명
- Allam, Omar.
- 서명/저자
- Atomistic Modeling and Machine Learning for the Rational Design of Organic Energy Storage Materials
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 186 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Jang, Seung Soon;Lee, Seung Woo.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약Due to the ever-increasing need for energy storage solutions that are both highperforming and environmentally sustainable, the development of electrochemically active organic materials offers a promising direction for improving energy density, safety, and environmental impact in comparison to conventional inorganic materials that are commonly used. This dissertation integrates multiscale atomistic modeling with machine learning to develop a framework for the design of organic materials with enhanced alkaliion storage capabilities. Additionally, the dissertation investigates the development of organic solid polymer electrolytes (SPEs) through molecular dynamics simulations, with a focus on scalable mechanisms for modulating nanophase morphology to achieve enhanced ion transport.The dissertation starts with the application of a density-functional theory (DFT) and machine learning (ML) framework that effectively captures the relationships between the structural and electronic properties of organic compounds. The DFT-ML framework identifies the descriptors influencing the redox potentials of organics. This approach is complemented by a high-throughput virtual screening (HTVS) pipeline that a series of surrogate ML models to predict essential intermediate properties for determining redox potentials, greatly improving the efficiency of screening across a much larger chemical space. By breaking down the high fidelity DFT calculations into successive machine learning surrogates, the pipeline assesses key electronic properties while minimizing computational cost.The dissertation then transitions to focused studies on carbon quantum dot (CQD) and reduced graphene oxide (rGO) hybrids, examining how their reactivity and interactions with alkali ions can be fine-tuned through hydrothermal reduction and adjustments in oxygen functional group content. This analysis offers a systematic framework for enhancing electrochemical performance across lithium, sodium, and potassium ion battery applications.Then CO2-containing Li-O2 battery electrolytes are studied, where the study of temperature-dependent solvation dynamics in glyme-based electrolytes reveals mechanisms that influence the stability and reactivity of intermediate peroxocarbonate species. The findings reveal the critical impact of temperature on solvation interactions and the formation of Li2CO3 precipitates. This study provides an assessment of the practical shift from Li-O2 cells to Li-air (where the presence of CO2 substantially alters the cell's electrochemistry), and their corresponding temperature-dependent performance.The dissertation then investigates ways to improve the cycling stability or organic cathode materials by preventing their dissolution in the organic electrolytes. It is found that the development of novel SPEs is necessary to form a more compatible electrolyte for these materials. This work begins by assessing the dynamics of liquid carbonate electrolytes in lithium-ion batteries, with a focus on how salt concentration affects the mobility of solvent molecules and ion clustering. This part of the work provides insights crucial for optimizing electrolyte compositions for improved energy storage capabilities. The work then shifts to designing polymers based on the liquid carbonate derivatives, identifying practical and scalable strategies for modulating nanophase morphology to achieve optimized performance.
- 일반주제명
- Polymers
- 일반주제명
- Phosphorus
- 일반주제명
- Electrolytes
- 일반주제명
- Oxygen
- 일반주제명
- Investigations
- 일반주제명
- Electrodes
- 일반주제명
- Carbon
- 일반주제명
- Solvents
- 일반주제명
- Neural networks
- 일반주제명
- Salt
- 일반주제명
- Metal oxides
- 일반주제명
- Batteries
- 일반주제명
- Energy storage
- 일반주제명
- Quantum dots
- 일반주제명
- Energy consumption
- 일반주제명
- Alternative energy
- 일반주제명
- Polymer chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2024 us c eng d■001000017360379
■00520260202105515
■006m o d
■007cr#unu||||||||
■020 ▼a9798263337735
■035 ▼a(MiAaPQ)AAI32309302
■035 ▼a(MiAaPQ)GeorgiaTech75265
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼aAllam, Omar.
■24510▼aAtomistic Modeling and Machine Learning for the Rational Design of Organic Energy Storage Materials
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a186 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Jang, Seung Soon;Lee, Seung Woo.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aDue to the ever-increasing need for energy storage solutions that are both highperforming and environmentally sustainable, the development of electrochemically active organic materials offers a promising direction for improving energy density, safety, and environmental impact in comparison to conventional inorganic materials that are commonly used. This dissertation integrates multiscale atomistic modeling with machine learning to develop a framework for the design of organic materials with enhanced alkaliion storage capabilities. Additionally, the dissertation investigates the development of organic solid polymer electrolytes (SPEs) through molecular dynamics simulations, with a focus on scalable mechanisms for modulating nanophase morphology to achieve enhanced ion transport.The dissertation starts with the application of a density-functional theory (DFT) and machine learning (ML) framework that effectively captures the relationships between the structural and electronic properties of organic compounds. The DFT-ML framework identifies the descriptors influencing the redox potentials of organics. This approach is complemented by a high-throughput virtual screening (HTVS) pipeline that a series of surrogate ML models to predict essential intermediate properties for determining redox potentials, greatly improving the efficiency of screening across a much larger chemical space. By breaking down the high fidelity DFT calculations into successive machine learning surrogates, the pipeline assesses key electronic properties while minimizing computational cost.The dissertation then transitions to focused studies on carbon quantum dot (CQD) and reduced graphene oxide (rGO) hybrids, examining how their reactivity and interactions with alkali ions can be fine-tuned through hydrothermal reduction and adjustments in oxygen functional group content. This analysis offers a systematic framework for enhancing electrochemical performance across lithium, sodium, and potassium ion battery applications.Then CO2-containing Li-O2 battery electrolytes are studied, where the study of temperature-dependent solvation dynamics in glyme-based electrolytes reveals mechanisms that influence the stability and reactivity of intermediate peroxocarbonate species. The findings reveal the critical impact of temperature on solvation interactions and the formation of Li2CO3 precipitates. This study provides an assessment of the practical shift from Li-O2 cells to Li-air (where the presence of CO2 substantially alters the cell's electrochemistry), and their corresponding temperature-dependent performance.The dissertation then investigates ways to improve the cycling stability or organic cathode materials by preventing their dissolution in the organic electrolytes. It is found that the development of novel SPEs is necessary to form a more compatible electrolyte for these materials. This work begins by assessing the dynamics of liquid carbonate electrolytes in lithium-ion batteries, with a focus on how salt concentration affects the mobility of solvent molecules and ion clustering. This part of the work provides insights crucial for optimizing electrolyte compositions for improved energy storage capabilities. The work then shifts to designing polymers based on the liquid carbonate derivatives, identifying practical and scalable strategies for modulating nanophase morphology to achieve optimized performance.
■590 ▼aSchool code: 0078.
■650 4▼aPolymers
■650 4▼aPhosphorus
■650 4▼aElectrolytes
■650 4▼aOxygen
■650 4▼aInvestigations
■650 4▼aElectrodes
■650 4▼aCarbon
■650 4▼aSolvents
■650 4▼aNeural networks
■650 4▼aSalt
■650 4▼aMetal oxides
■650 4▼aBatteries
■650 4▼aEnergy storage
■650 4▼aQuantum dots
■650 4▼aEnergy consumption
■650 4▼aAlternative energy
■650 4▼aPolymer chemistry
■690 ▼a0363
■690 ▼a0800
■690 ▼a0495
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360379▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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