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Using Advanced Imaging Approaches to Characterize Degradation Modes During Fast-Charging of Lithium-Ion Batteries
Using Advanced Imaging Approaches to Characterize Degradation Modes During Fast-Charging o...
Using Advanced Imaging Approaches to Characterize Degradation Modes During Fast-Charging of Lithium-Ion Batteries

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자료유형  
 학위논문 서양
최종처리일시  
20260209102935
ISBN  
9798265430182
DDC  
001
저자명  
Yusuf, Maha.
서명/저자  
Using Advanced Imaging Approaches to Characterize Degradation Modes During Fast-Charging of Lithium-Ion Batteries
발행사항  
[Sl] : Stanford University, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
187 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
주기사항  
Advisor: Bao, Zhenan;Toney, Michael.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2023.
초록/해제  
요약Long charging times of lithium-ion batteries (LIBs) have impeded the widespread deployment of electric vehicles (EVs). Currently available EVs cannot charge at rates like those of refueling at a gas station. Thus, the U.S. Department of Energy and the U.S. Advanced Battery Consortium has identified extreme fast charging (XFC) to reduce LIB charging times to under 10-15 minutes as one of their main goals to meet their national goal of around 50 % plug-in EVs in U.S. by 2030. However, existing LIBs cannot achieve these XFC goals without significant capacity fade over cycling. This is mainly attributed to the irreversible loss of lithium (Li) after plating on the graphite electrode. While numerous methods have detected Li plating, they lack three-dimensional (3D) non-invasive quantification of plated Li on graphite electrodes in full cells during battery cycling. Advanced imaging approaches using neutrons and X-rays are promising characterization tools for non-destructive 3D visualization of battery materials. Here, neutrons are particularly sensitive to detecting Li on graphite due to the large difference in their total neutron cross-sections (Li:C ≈ 72:6 barns) Here, 1 barn = 10−24 cm2.First, I demonstrated the viability of simultaneous neutron- and X-ray based tomography (NeXT) as a non-destructive imaging platform for ex-situ 3D visualization of graphite electrode degradation following extreme fast charging (XFC). In addition, I underscored the benefits of the simultaneous nature of NeXT by combining the neutron and X-ray data from the same sample location for material identification and segmentation of one pristine and two XFC-cycled graphite electrodes (9C charge for 450 cycles). Finally, my ex-situ results and methodology development paved the way for the design of NeXT-friendly LIB geometries for operando and/or in-situ threedimensional (3D) visualization of electrode degradation during XFC.Second, I outlined the design and characterization of a neutron-friendly LIB (NFB) coin-cell for visualization of plated Li at the separator-electrolyte-electrode interface during XFC. Using database-derived total neutron attenuation cross-sections, neutron path lengths, and the expected neutron transmission from the battery materials of interest, I designed our NFB. My electrochemical characterization results showed that the NFB can undergo XFC at 6C. My neutron radiography results exhibited excellent neutron transmission, enabling visualization of the graphite-separator-electrolyte interface.Third, I investigated the 3D morphological behavior and spatial heterogeneities of plated, dead, and active Li on thick graphite anodes following XFC using the designed NFB. My results revealed changes in plated, dead, and active Li morphologies from isolated deposits at 1C to mossier and denser outgrowths covering the entire circumference of the graphite anode at 6C. Here, dead Li denotes Li that has become electronically disconnected from the rest of the graphite anode, and hence cannot find a pathway back to the cathode during battery discharge. My data also demonstrated different 3D morphological growth mechanisms at 1C vs 6C, indicating associations between the (1) dendritic Li growth and higher XFC-charging rate; (2) root-growing mossy Li and a relatively slower XFC-charging rate. My 3D visualizations exhibited spatial heterogeneities of plated, dead, and active Li, thus revealing that certain areas around the graphite anode cultivated more dead as compared to the active Li.Overall, this thesis encompasses neutron and X-ray µ-CT methodology development, and electrochemical engineering to discover fundamental mechanisms of Li plating behavior during XFC in-situ in full cell LIBs in 3D non-destructively. My contributions to imaging fast-charging LIBs, will help design improved batteries for EVs and other applications such as grid-scale energy storage.
일반주제명  
Software
일반주제명  
Tomography
일반주제명  
Graphite
일반주제명  
Histograms
일반주제명  
Electrodes
일반주제명  
Neutrons
일반주제명  
Science education
일반주제명  
Plating
일반주제명  
Copper
일반주제명  
Engineering
일반주제명  
Batteries
일반주제명  
Visualization
일반주제명  
Lithium
일반주제명  
X-rays
일반주제명  
Atomic physics
일반주제명  
Medical imaging
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05A.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aYusuf,  Maha.
■24510▼aUsing  Advanced  Imaging  Approaches  to  Characterize  Degradation  Modes  During  Fast-Charging  of  Lithium-Ion  Batteries
■260    ▼a[Sl]▼bStanford  University▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a187  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  A.
■500    ▼aAdvisor:  Bao,  Zhenan;Toney,  Michael.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2023.
■520    ▼aLong  charging  times  of  lithium-ion  batteries  (LIBs)  have  impeded  the  widespread  deployment  of  electric  vehicles  (EVs).  Currently  available  EVs  cannot  charge  at  rates  like  those  of  refueling  at  a  gas  station.  Thus,  the  U.S.  Department  of  Energy  and  the  U.S.  Advanced  Battery  Consortium  has  identified  extreme  fast  charging  (XFC)  to  reduce  LIB  charging  times  to  under  10-15  minutes  as  one  of  their  main  goals  to  meet  their  national  goal  of  around  50  %  plug-in  EVs  in  U.S.  by  2030.  However,  existing  LIBs  cannot  achieve  these  XFC  goals  without  significant  capacity  fade  over  cycling.  This  is  mainly  attributed  to  the  irreversible  loss  of  lithium  (Li)  after  plating  on  the  graphite  electrode.  While  numerous  methods  have  detected  Li  plating,  they  lack  three-dimensional  (3D)  non-invasive  quantification  of  plated  Li  on  graphite  electrodes  in  full  cells  during  battery  cycling.  Advanced  imaging  approaches  using  neutrons  and  X-rays  are  promising  characterization  tools  for  non-destructive  3D  visualization  of  battery  materials.  Here,  neutrons  are  particularly  sensitive  to  detecting  Li  on  graphite  due  to  the  large  difference  in  their  total  neutron  cross-sections  (Li:C  ≈  72:6  barns)  Here,  1  barn  =  10−24  cm2.First,  I  demonstrated  the  viability  of  simultaneous  neutron-  and  X-ray  based  tomography  (NeXT)  as  a  non-destructive  imaging  platform  for  ex-situ  3D  visualization  of  graphite  electrode  degradation  following  extreme  fast  charging  (XFC).  In  addition,  I  underscored  the  benefits  of  the  simultaneous  nature  of  NeXT  by  combining  the  neutron  and  X-ray  data  from  the  same  sample  location  for  material  identification  and  segmentation  of  one  pristine  and  two  XFC-cycled  graphite  electrodes  (9C  charge  for  450  cycles).  Finally,  my  ex-situ  results  and  methodology  development  paved  the  way  for  the  design  of  NeXT-friendly  LIB  geometries  for  operando  and/or  in-situ  threedimensional  (3D)  visualization  of  electrode  degradation  during  XFC.Second,  I  outlined  the  design  and  characterization  of  a  neutron-friendly  LIB  (NFB)  coin-cell  for  visualization  of  plated  Li  at  the  separator-electrolyte-electrode  interface  during  XFC.  Using  database-derived  total  neutron  attenuation  cross-sections,  neutron  path  lengths,  and  the  expected  neutron  transmission  from  the  battery  materials  of  interest,  I  designed  our  NFB.  My  electrochemical  characterization  results  showed  that  the  NFB  can  undergo  XFC  at  6C.  My  neutron  radiography  results  exhibited  excellent  neutron  transmission,  enabling  visualization  of  the  graphite-separator-electrolyte  interface.Third,  I  investigated  the  3D  morphological  behavior  and  spatial  heterogeneities  of  plated,  dead,  and  active  Li  on  thick  graphite  anodes  following  XFC  using  the  designed  NFB.  My  results  revealed  changes  in  plated,  dead,  and  active  Li  morphologies  from  isolated  deposits  at  1C  to  mossier  and  denser  outgrowths  covering  the  entire  circumference  of  the  graphite  anode  at  6C.  Here,  dead  Li  denotes  Li  that  has  become  electronically  disconnected  from  the  rest  of  the  graphite  anode,  and  hence  cannot  find  a  pathway  back  to  the  cathode  during  battery  discharge.  My  data  also  demonstrated  different  3D  morphological  growth  mechanisms  at  1C  vs  6C,  indicating  associations  between  the  (1)  dendritic  Li  growth  and  higher  XFC-charging  rate;  (2)  root-growing  mossy  Li  and  a  relatively  slower  XFC-charging  rate.  My  3D  visualizations  exhibited  spatial  heterogeneities  of  plated,  dead,  and  active  Li,  thus  revealing  that  certain  areas  around  the  graphite  anode  cultivated  more  dead  as  compared  to  the  active  Li.Overall,  this  thesis  encompasses  neutron  and  X-ray  µ-CT  methodology  development,  and  electrochemical  engineering  to  discover  fundamental  mechanisms  of  Li  plating  behavior  during  XFC  in-situ  in  full  cell  LIBs  in  3D  non-destructively.  My  contributions  to  imaging  fast-charging  LIBs,  will  help  design  improved  batteries  for  EVs  and  other  applications  such  as  grid-scale  energy  storage.
■590    ▼aSchool  code:  0212.
■650  4▼aSoftware
■650  4▼aTomography
■650  4▼aGraphite
■650  4▼aHistograms
■650  4▼aElectrodes
■650  4▼aNeutrons
■650  4▼aScience  education
■650  4▼aPlating
■650  4▼aCopper
■650  4▼aEngineering
■650  4▼aBatteries
■650  4▼aVisualization
■650  4▼aLithium
■650  4▼aX-rays
■650  4▼aAtomic  physics
■650  4▼aMedical  imaging
■690    ▼a0537
■690    ▼a0714
■690    ▼a0748
■690    ▼a0574
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05A.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17366049▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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