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Recovery of isolated lithium through discharged state calendar ageing.
Zhang, Wenbo; Sayavong, Philaphon; Xiao, Xin; Oyakhire, Solomon T; Shuchi, Sanzeeda Baig; Vilá, Rafael A; Boyle, David T; Kim, Sang Cheol; Kim, Mun Sek; Holmes, Sarah E; Ye, Yusheng; Li, Donglin; Bent, Stacey F; Cui, Yi.
Afiliação
  • Zhang W; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Sayavong P; Department of Chemistry, Stanford University, Stanford, CA, USA.
  • Xiao X; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Oyakhire ST; Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
  • Shuchi SB; Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
  • Vilá RA; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Boyle DT; Department of Chemistry, Stanford University, Stanford, CA, USA.
  • Kim SC; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Kim MS; Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
  • Holmes SE; Department of Chemistry, Stanford University, Stanford, CA, USA.
  • Ye Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Li D; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
  • Bent SF; Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
  • Cui Y; Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA. yicui@stanford.edu.
Nature ; 626(7998): 306-312, 2024 Feb.
Article em En | MEDLINE | ID: mdl-38326593
ABSTRACT
Rechargeable Li-metal batteries have the potential to more than double the specific energy of the state-of-the-art rechargeable Li-ion batteries, making Li-metal batteries a prime candidate for next-generation high-energy battery technology1-3. However, current Li-metal batteries suffer from fast cycle degradation compared with their Li-ion battery counterparts2,3, preventing their practical adoption. A main contributor to capacity degradation is the disconnection of Li from the electrochemical circuit, forming isolated Li4-8. Calendar ageing studies have shown that resting in the charged state promotes further reaction of active Li with the surrounding electrolyte9-12. Here we discover that calendar ageing in the discharged state improves capacity retention through isolated Li recovery, which is in contrast with the well-known phenomenon of capacity degradation observed during the charged state calendar ageing. Inactive capacity recovery is verified through observation of Coulombic efficiency greater than 100% on both Li||Cu half-cells and anode-free cells using a hybrid continuous-resting cycling protocol and with titration gas chromatography. An operando optical setup further confirms excess isolated Li reactivation as the predominant contributor to the increased capacity recovery. These insights into a previously unknown pathway for capacity recovery through discharged state resting emphasize the marked impact of cycling strategies on Li-metal battery performance.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article