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Computational Discovery, Design and Optimization of High-Performance Thermoelectric Materials
Computational Discovery, Design and Optimization of High-Performance Thermoelectric Materi...
Computational Discovery, Design and Optimization of High-Performance Thermoelectric Materials

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자료유형  
 학위논문 서양
최종처리일시  
20260202105654
ISBN  
9798265452917
DDC  
620.11
저자명  
Qu, Jiaxing.
서명/저자  
Computational Discovery, Design and Optimization of High-Performance Thermoelectric Materials
발행사항  
[Sl] : University of Illinois at Urbana-Champaign, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
226 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisor: Ertekin, Elif.
학위논문주기  
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2024.
초록/해제  
요약The Materials Genome Initiative (MGI) offers a promising route to revolutionize the realization and discovery of a diverse set of functional materials. A key to the success of the MGI is the synergistic effect of computational and experimental material science, wherein computation serves as a guide for experimentation. The field of thermoelectrics (TE) has historically been dominated by experimental work motivated by chemical intuition. However, sampling the search space by trial-and-error experiments is not efficient and the discovery of top TE materials is largely from serendipity. Therefore, it is critical to achieve computation-driven discovery, design and optimization of TEs, ideally in a high-throughput manner. The challenge comes from the stringent requirements for an effective thermoelectric material, which requires both favorable intrinsic properties relevant for charge carrier and heat transport, as well as defect characteristics to achieve optimal carrier concentrations for maximized TE performance. The objective of this work is to develop a first-principles materials discovery, optimization and design framework for TE candidates considering both transport and defect properties. Our work mainly examined two material classes computationally in detail --diamond-like semiconductors (DLS) and Zintl phases which exhibit reciprocal behaviors in terms of electron and thermal transport. In the first part of my work, I applied different optimization techniques in these two representative of diverse material systems to investigate the fundamental physics of electron transport and defect chemistry. The ternary and quaternary DLS phases exhibit unusually high electronic mobility and abnormally low lattice thermal conductivity ideal for thermoelectrics. For DLS materials with intrinsic favorable electrical and thermal transport, my work primarily focuses on defect engineering by controlling native defects and introducing extrinsic doping to tune the carrier concentrations to maximize their TE performance. The other family is the Zintl phases which have recently been recognized as promising TE candidates owing to their complex crystal structures, intricate chemical bonding, and thus intrinsically low thermal conductivity. For Zintl phases with favorable poor thermal transport, by contrast, my optimization approach concentrates on promoting electron transport via band engineering. The second part deals with computational discovery of high-performance TE materials. To avoid the computational extensive cost for transport and defect calculations, I designed a funnel-based framework to achieve high-throughput search of high-performance TE materials using first-principles simulations. This framework employs computationally tractable descriptors and semi-empirical transport models to assess the TE performance of large chemical spaces, thus can effectively select candidates with promising intrinsic transport properties for subsequent more computationally extensive defect analysis. We applied this framework to the search of n-type Zintl phases and successfully identified several n-type dopable Zintl phases, adding to the list of rare n-type Zintl phases. This framework also enables discovery of I-III5-Te8 (I = Cu, Ag; III = Ga, In) ordered-vacancy chalcogenides (OVCs), a special class of DLS materials, which closely resemble state-of-the-art TE materials I-III-Te2 chalcopyrites. Leveraging another computational tool - modern deep learning models, we designed a recommendation engine for material discovery empowered by natural language representation and demonstrated its application on TE materials. With the contextual information obtained from language representations, we demonstrated diversified recommendations of prototype structures and identify under-studied high-performance material spaces. In the third part, we focus on generalized material design framework and rules for high-performance TEs. For alloy Zintl systems, we designed a computational framework that combines first-principles calculations with alloy and point defect modeling to identify optimal alloy compositions. This design enables multi-task optimization of electronic, thermal, and defect properties in alloy systems. Band unfolding is performed to sketch the effective band structures of alloys and identify compositions to facilitate band convergence and minimize alloy scattering of electrons. Additionally, we further contributed to the design of low thermal conductivity bulk Zintl phases via local motif analysis. Leveraging a structural fingerprint, Zintl phases are classified into structure prototypes by coordination motifs and connectivity.This work reveals several design strategies for achieving low thermal conductivity Zintl phases from the motif-level perspective and identifies linear-chains and trigonal planar structure prototypes as promising TE candidates with ultra-low thermal conductivity. Together, our efforts ultimately advance the discipline of TEs in the direction of the MGI's vision. We have provided understandings for optimization strategies for TE performance, identified potential candidates for TE applications, and built-upon existing computational techniques to accelerate material discovery and design. These efforts have begun to reveal the complex structure-property dependency that advances TE performance.
일반주제명  
Materials science
일반주제명  
Computational chemistry
일반주제명  
Chemical engineering
키워드  
Thermoelectrics
키워드  
Computational material discovery
키워드  
Chemical intuition
키워드  
Diamond-like semiconductors
기타저자  
University of Illinois at Urbana-Champaign Mechanical Sci & Engineering
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aQu,  Jiaxing.
■24510▼aComputational  Discovery,  Design  and  Optimization  of  High-Performance  Thermoelectric  Materials
■260    ▼a[Sl]▼bUniversity  of  Illinois  at  Urbana-Champaign▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a226  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisor:  Ertekin,  Elif.
■5021  ▼aThesis  (Ph.D.)--University  of  Illinois  at  Urbana-Champaign,  2024.
■520    ▼aThe  Materials  Genome  Initiative  (MGI)  offers  a  promising  route  to  revolutionize  the  realization  and  discovery  of  a  diverse  set  of  functional  materials.  A  key  to  the  success  of  the  MGI  is  the  synergistic  effect  of  computational  and  experimental  material  science,  wherein  computation  serves  as  a  guide  for  experimentation.  The  field  of  thermoelectrics  (TE)  has  historically  been  dominated  by  experimental  work  motivated  by  chemical  intuition.  However,  sampling  the  search  space  by  trial-and-error  experiments  is  not  efficient  and  the  discovery  of  top  TE  materials  is  largely  from  serendipity.  Therefore,  it  is  critical  to  achieve  computation-driven  discovery,  design  and  optimization  of  TEs,  ideally  in  a  high-throughput  manner.  The  challenge  comes  from  the  stringent  requirements  for  an  effective  thermoelectric  material,  which  requires  both  favorable  intrinsic  properties  relevant  for  charge  carrier  and  heat  transport,  as  well  as  defect  characteristics  to  achieve  optimal  carrier  concentrations  for  maximized  TE  performance.  The  objective  of  this  work  is  to  develop  a  first-principles  materials  discovery,  optimization  and  design  framework  for  TE  candidates  considering  both  transport  and  defect  properties.                          Our  work  mainly  examined  two  material  classes  computationally  in  detail  --diamond-like  semiconductors  (DLS)  and  Zintl  phases  which  exhibit  reciprocal  behaviors  in  terms  of  electron  and  thermal  transport.  In  the  first  part  of  my  work,  I  applied  different  optimization  techniques  in  these  two  representative  of  diverse  material  systems  to  investigate  the  fundamental  physics  of  electron  transport  and  defect  chemistry.  The  ternary  and  quaternary  DLS  phases  exhibit  unusually  high  electronic  mobility  and  abnormally  low  lattice  thermal  conductivity  ideal  for  thermoelectrics.  For  DLS  materials  with  intrinsic  favorable  electrical  and  thermal  transport,  my  work  primarily  focuses  on  defect  engineering  by  controlling  native  defects  and  introducing  extrinsic  doping  to  tune  the  carrier  concentrations  to  maximize  their  TE  performance.  The  other  family  is  the  Zintl  phases  which  have  recently  been  recognized  as  promising  TE  candidates  owing  to  their  complex  crystal  structures,  intricate  chemical  bonding,  and  thus  intrinsically  low  thermal  conductivity.  For  Zintl  phases  with  favorable  poor  thermal  transport,  by  contrast,  my  optimization  approach  concentrates  on  promoting  electron  transport  via  band  engineering.                        The  second  part  deals  with  computational  discovery  of  high-performance  TE  materials.  To  avoid  the  computational  extensive  cost  for  transport  and  defect  calculations,  I  designed  a  funnel-based  framework  to  achieve  high-throughput  search  of  high-performance  TE  materials  using  first-principles  simulations.  This  framework  employs  computationally  tractable  descriptors  and  semi-empirical  transport  models  to  assess  the  TE  performance  of  large  chemical  spaces,  thus  can  effectively  select  candidates  with  promising  intrinsic  transport  properties  for  subsequent  more  computationally  extensive  defect  analysis.  We  applied  this  framework  to  the  search  of  n-type  Zintl  phases  and  successfully  identified  several  n-type  dopable  Zintl  phases,  adding  to  the  list  of  rare  n-type  Zintl  phases.  This  framework  also  enables  discovery  of  I-III5-Te8  (I  =  Cu,  Ag;  III  =  Ga,  In)  ordered-vacancy  chalcogenides  (OVCs),  a  special  class  of  DLS  materials,  which  closely  resemble  state-of-the-art  TE  materials  I-III-Te2  chalcopyrites.  Leveraging  another  computational  tool  -  modern  deep  learning  models,  we  designed  a  recommendation  engine  for  material  discovery  empowered  by  natural  language  representation  and  demonstrated  its  application  on  TE  materials.  With  the  contextual  information  obtained  from  language  representations,  we  demonstrated  diversified  recommendations  of  prototype  structures  and  identify  under-studied  high-performance  material  spaces.                        In  the  third  part,  we  focus  on  generalized  material  design  framework  and  rules  for  high-performance  TEs.  For  alloy  Zintl  systems,  we  designed  a  computational  framework  that  combines  first-principles  calculations  with  alloy  and  point  defect  modeling  to  identify  optimal  alloy  compositions.  This  design  enables  multi-task  optimization  of  electronic,  thermal,  and  defect  properties  in  alloy  systems.  Band  unfolding  is  performed  to  sketch  the  effective  band  structures  of  alloys  and  identify  compositions  to  facilitate  band  convergence  and  minimize  alloy  scattering  of  electrons.  Additionally,  we  further  contributed  to  the  design  of  low  thermal  conductivity  bulk  Zintl  phases  via  local  motif  analysis.    Leveraging  a  structural  fingerprint,  Zintl  phases  are  classified  into  structure  prototypes  by  coordination  motifs  and  connectivity.This  work  reveals  several  design  strategies  for  achieving  low  thermal  conductivity  Zintl  phases  from  the  motif-level  perspective  and  identifies  linear-chains  and  trigonal  planar  structure  prototypes  as  promising  TE  candidates  with  ultra-low  thermal  conductivity.                        Together,  our  efforts  ultimately  advance  the  discipline  of  TEs  in  the  direction  of  the  MGI's  vision.  We  have  provided  understandings  for  optimization  strategies  for  TE  performance,  identified  potential  candidates  for  TE  applications,  and  built-upon  existing  computational  techniques  to  accelerate  material  discovery  and  design.  These  efforts  have  begun  to  reveal  the  complex  structure-property  dependency  that  advances  TE  performance.
■590    ▼aSchool  code:  0090.
■650  4▼aMaterials  science
■650  4▼aComputational  chemistry
■650  4▼aChemical  engineering
■653    ▼aThermoelectrics
■653    ▼aComputational  material  discovery
■653    ▼aChemical  intuition
■653    ▼aDiamond-like  semiconductors
■690    ▼a0794
■690    ▼a0542
■690    ▼a0219
■71020▼aUniversity  of  Illinois  at  Urbana-Champaign▼bMechanical  Sci  &  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■790    ▼a0090
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361029▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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