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Origin and hysteresis of lithium compositional spatiodynamics within battery primary particles.
Lim, Jongwoo; Li, Yiyang; Alsem, Daan Hein; So, Hongyun; Lee, Sang Chul; Bai, Peng; Cogswell, Daniel A; Liu, Xuzhao; Jin, Norman; Yu, Young-sang; Salmon, Norman J; Shapiro, David A; Bazant, Martin Z; Tyliszczak, Tolek; Chueh, William C.
Afiliação
  • Lim J; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. Stanford Institute for Materials & Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
  • Li Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
  • Alsem DH; Hummingbird Scientific, Lacey, WA 98516, USA.
  • So H; Department of Aeronautics and Astronautics, Stanford University, Stanford, CA 94305, USA.
  • Lee SC; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
  • Bai P; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Cogswell DA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Liu X; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
  • Jin N; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
  • Yu YS; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
  • Salmon NJ; Hummingbird Scientific, Lacey, WA 98516, USA.
  • Shapiro DA; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
  • Bazant MZ; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. SUNCAT Inter
  • Tyliszczak T; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
  • Chueh WC; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. Stanford Institute for Materials & Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA. wchueh@stanford.edu.
Science ; 353(6299): 566-71, 2016 Aug 05.
Article em En | MEDLINE | ID: mdl-27493180
ABSTRACT
The kinetics and uniformity of ion insertion reactions at the solid-liquid interface govern the rate capability and lifetime, respectively, of electrochemical devices such as Li-ion batteries. Using an operando x-ray microscopy platform that maps the dynamics of the Li composition and insertion rate in Li(x)FePO4, we found that nanoscale spatial variations in rate and in composition control the lithiation pathway at the subparticle length scale. Specifically, spatial variations in the insertion rate constant lead to the formation of nonuniform domains, and the composition dependence of the rate constant amplifies nonuniformities during delithiation but suppresses them during lithiation, and moreover stabilizes the solid solution during lithiation. This coupling of lithium composition and surface reaction rates controls the kinetics and uniformity during electrochemical ion insertion.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article
Texto completo
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PubMed Links
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article