본문

서브메뉴

Materials Design of Li Superionic Conductors for All-Solid-State Batteries- [electronic resource]
Materials Design of Li Superionic Conductors for All-Solid-State Batteries - [electronic r...
Materials Design of Li Superionic Conductors for All-Solid-State Batteries- [electronic resource]

상세정보

자료유형  
 학위논문파일 국외
최종처리일시  
20240214100320
ISBN  
9798380621540
DDC  
620.11
저자명  
Sun, Yingzhi.
서명/저자  
Materials Design of Li Superionic Conductors for All-Solid-State Batteries - [electronic resource]
발행사항  
[S.l.]: : University of California, Berkeley., 2022
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2022
형태사항  
1 online resource(142 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
주기사항  
Advisor: Ceder, Gerbrand.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2022.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약As the use of lithium-ion batteries in consumer electronics and electric vehicles has grown, safety issues such as those arising from leakage and flammability of the organic liquid electrolyte have garnered increased attention. By replacing the organic liquid electrolyte with an inorganic solid electrolyte, however, these concerns can be circumvented, thereby improving the safety of the battery system. In addition, solid-state batteries are also expected to possess higher energy density than their conventional counterparts. On the anode side, the high modulus of the solid electrolyte is expected to constrain the growth of Li dendrites, which might enable the use of a Li metal anode. Furthermore, because some solid electrolytes possess a wide electrochemical stability window, high-voltage cathodes ( 4.5 V, vs Li+/Li) may be used to further improve the total energy density.The superionic conductor is one of the key parts of solid-state batteries. Over the past 20 years, accelerated development of Li superionic conductors has occurred. The ionic conductivities of some of these superionic conductors approach or even surpass those of liquid electrolytes. However, most reported superionic conductors have obvious drawbacks. New superionic conductors that meet all the requirements of solid-state batteries are needed. There are two strategies for exploring new potential superionic conductors: (1) modification the chemical composition based on the crystal structure of known fast Li conductors to further improve the properties or (2) searching for Li conductors with new crystal structures based on the structural features that favor fast Li+ migration. In this dissertation, new superionic conductors are designed and explored by implementing both of these strategies.Specifically, a strategy is developed to increase the ionic conductivity of sulfide Li-ion conductors through composition modification. Inspired by the wide use of halogens in superionic conductors, we propose that the conductivity could be further improved by substituting halogens with suitable pseudo-halogens. The Li argyrodite system was used to demonstrate the feasibility of this strategy. BH4-substituted Li argyrodite was successfully synthesized and shown to have a room-temperature ionic conductivity of 4.8 mS/cm which is 5 times higher than that of halogen-substituted Li argyrodites. We further discuss the mechanism underlying the enhanced ionic conductivity and find that the faster Li diffusion originates from the weak interaction between Li and BH4. The results provide design strategies for new superionic conductors with pseudo-halogen substitution.We also present a structural feature that benefits the Li-ion migration in oxide Li-ion conductors. Based on a statistical analysis of the materials in the inorganic materials database, we discovered that the corner-sharing connectivity of the oxide crystal structure framework is more likely to have a distorted lithium environment with higher site energy. Materials with a corner-sharing framework are also usually less compact, which reduces the repulsion from non-lithium cations. Both features lead to a decreased migration barrier and accelerate the Li diffusion. A high-throughput search was performed based on this structural feature, and 10 new oxide Li-ion conductors were predicted. One of them, LiGa(SeO3)2, was successfully synthesized and was shown to have a bulk conductivity of 0.11 mS/cm, in agreement with theory predictions. These findings provide fundamental insights into the physical attributes that govern fast lithium conduction and help project new directions towards the discovery of superionic conductors for all-solid-state batteries.
일반주제명  
Materials science.
일반주제명  
Engineering.
일반주제명  
Inorganic chemistry.
키워드  
Electrochemistry
키워드  
Energy storage materials
키워드  
Lithium-ion batteries
키워드  
Solid electrolyte
키워드  
Solid-state batteries
키워드  
Superionic conductor
기타저자  
University of California, Berkeley Materials Science & Engineering
기본자료저록  
Dissertations Abstracts International. 85-04B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008240612s2022      us  |||||||||||||||c||eng  d
■001000016931877
■00520240214100320
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798380621540
■035    ▼a(MiAaPQ)AAI30242292
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a620.11
■1001  ▼aSun,  Yingzhi.
■24510▼aMaterials  Design  of  Li  Superionic  Conductors  for  All-Solid-State  Batteries▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  California,  Berkeley.  ▼c2022
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
■300    ▼a1  online  resource(142  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-04,  Section:  B.
■500    ▼aAdvisor:  Ceder,  Gerbrand.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2022.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aAs  the  use  of  lithium-ion  batteries  in  consumer  electronics  and  electric  vehicles  has  grown,  safety  issues  such  as  those  arising  from  leakage  and  flammability  of  the  organic  liquid  electrolyte  have  garnered  increased  attention.  By  replacing  the  organic  liquid  electrolyte  with  an  inorganic  solid  electrolyte,  however,  these  concerns  can  be  circumvented,  thereby  improving  the  safety  of  the  battery  system.  In  addition,  solid-state  batteries  are  also  expected  to  possess  higher  energy  density  than  their  conventional  counterparts.  On  the  anode  side,  the  high  modulus  of  the  solid  electrolyte  is  expected  to  constrain  the  growth  of  Li  dendrites,  which  might  enable  the  use  of  a  Li  metal  anode.  Furthermore,  because  some  solid  electrolytes  possess  a  wide  electrochemical  stability  window,  high-voltage  cathodes  (  4.5  V,  vs  Li+/Li)  may  be  used  to  further  improve  the  total  energy  density.The  superionic  conductor  is  one  of  the  key  parts  of  solid-state  batteries.  Over  the  past  20  years,  accelerated  development  of  Li  superionic  conductors  has  occurred.  The  ionic  conductivities  of  some  of  these  superionic  conductors  approach  or  even  surpass  those  of  liquid  electrolytes.  However,  most  reported  superionic  conductors  have  obvious  drawbacks.  New  superionic  conductors  that  meet  all  the  requirements  of  solid-state  batteries  are  needed.  There  are  two  strategies  for  exploring  new  potential  superionic  conductors:  (1)  modification  the  chemical  composition  based  on  the  crystal  structure  of  known  fast  Li  conductors  to  further  improve  the  properties  or  (2)  searching  for  Li  conductors  with  new  crystal  structures  based  on  the  structural  features  that  favor  fast  Li+  migration.  In  this  dissertation,  new  superionic  conductors  are  designed  and  explored  by  implementing  both  of  these  strategies.Specifically,  a  strategy  is  developed  to  increase  the  ionic  conductivity  of  sulfide  Li-ion  conductors  through  composition  modification.  Inspired  by  the  wide  use  of  halogens  in  superionic  conductors,  we  propose  that  the  conductivity  could  be  further  improved  by  substituting  halogens  with  suitable  pseudo-halogens.  The  Li  argyrodite  system  was  used  to  demonstrate  the  feasibility  of  this  strategy.  BH4-substituted  Li  argyrodite  was  successfully  synthesized  and  shown  to  have  a  room-temperature  ionic  conductivity  of  4.8  mS/cm  which  is  5  times  higher  than  that  of  halogen-substituted  Li  argyrodites.  We  further  discuss  the  mechanism  underlying  the  enhanced  ionic  conductivity  and  find  that  the  faster  Li  diffusion  originates  from  the  weak  interaction  between  Li  and  BH4.  The  results  provide  design  strategies  for  new  superionic  conductors  with  pseudo-halogen  substitution.We  also  present  a  structural  feature  that  benefits  the  Li-ion  migration  in  oxide  Li-ion  conductors.  Based  on  a  statistical  analysis  of  the  materials  in  the  inorganic  materials  database,  we  discovered  that  the  corner-sharing  connectivity  of  the  oxide  crystal  structure  framework  is  more  likely  to  have  a  distorted  lithium  environment  with  higher  site  energy.  Materials  with  a  corner-sharing  framework  are  also  usually  less  compact,  which  reduces  the  repulsion  from  non-lithium  cations.  Both  features  lead  to  a  decreased  migration  barrier  and  accelerate  the  Li  diffusion.  A  high-throughput  search  was  performed  based  on  this  structural  feature,  and  10  new  oxide  Li-ion  conductors  were  predicted.  One  of  them,  LiGa(SeO3)2,  was  successfully  synthesized  and  was  shown  to  have  a  bulk  conductivity  of  0.11  mS/cm,  in  agreement  with  theory  predictions.  These  findings  provide  fundamental  insights  into  the  physical  attributes  that  govern  fast  lithium  conduction  and  help  project  new  directions  towards  the  discovery  of  superionic  conductors  for  all-solid-state  batteries.
■590    ▼aSchool  code:  0028.
■650  4▼aMaterials  science.
■650  4▼aEngineering.
■650  4▼aInorganic  chemistry.
■653    ▼aElectrochemistry
■653    ▼aEnergy  storage  materials
■653    ▼aLithium-ion  batteries
■653    ▼aSolid  electrolyte
■653    ▼aSolid-state  batteries
■653    ▼aSuperionic  conductor
■690    ▼a0794
■690    ▼a0488
■690    ▼a0537
■71020▼aUniversity  of  California,  Berkeley▼bMaterials  Science  &  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g85-04B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2022
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931877▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF06067 전자도서 마이폴더 부재도서신고 비도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.