Your browser doesn't support javascript.
loading
Dynamic spatial progression of isolated lithium during battery operations.
Liu, Fang; Xu, Rong; Wu, Yecun; Boyle, David Thomas; Yang, Ankun; Xu, Jinwei; Zhu, Yangying; Ye, Yusheng; Yu, Zhiao; Zhang, Zewen; Xiao, Xin; Huang, Wenxiao; Wang, Hansen; Chen, Hao; Cui, Yi.
Afiliación
  • Liu F; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Xu R; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Wu Y; Department of Electrical Engineering, Stanford University, Stanford, CA, USA.
  • Boyle DT; Department of Chemistry, Stanford University, Stanford, CA, USA.
  • Yang A; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Xu J; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Zhu Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Ye Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Yu Z; Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
  • Zhang Z; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Xiao X; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Huang W; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Wang H; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Chen H; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Cui Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA. yicui@stanford.edu.
Nature ; 600(7890): 659-663, 2021 12.
Article en En | MEDLINE | ID: mdl-34937896
ABSTRACT
The increasing demand for next-generation energy storage systems necessitates the development of high-performance lithium batteries1-3. Unfortunately, current Li anodes exhibit rapid capacity decay and a short cycle life4-6, owing to the continuous generation of solid electrolyte interface7,8 and isolated Li (i-Li)9-11. The formation of i-Li during the nonuniform dissolution of Li dendrites12 leads to a substantial capacity loss in lithium batteries under most testing conditions13. Because i-Li loses electrical connection with the current collector, it has been considered electrochemically inactive or 'dead' in batteries14,15. Contradicting this commonly accepted presumption, here we show that i-Li is highly responsive to battery operations, owing to its dynamic polarization to the electric field in the electrolyte. Simultaneous Li deposition and dissolution occurs on two ends of the i-Li, leading to its spatial progression toward the cathode (anode) during charge (discharge). Revealed by our simulation results, the progression rate of i-Li is mainly affected by its length, orientation and the applied current density. Moreover, we successfully demonstrate the recovery of i-Li in Cu-Li cells with >100% Coulombic efficiency and realize LiNi0.5Mn0.3Co0.2O2 (NMC)-Li full cells with extended cycle life.
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nature Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Nature Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos