Interlayer Lithium Plating in Au Nanoparticles Pillared Reduced Graphene Oxide for Lithium Metal Anodes

Jun Pu, Jiachen Li, Zihan Shen, Chenglin Zhong, Jinyun Liu, Haixia Ma, Jia Zhu, Huigang Zhang, Paul V. Braun

Research output: Contribution to journalArticlepeer-review

Abstract

Lithium metal anodes suffer from serious safety issues and rapid capacity fade because of nonideal plating/stripping behaviors. Lithium nucleation on undesired positions usually results from nonuniform multiphysical field distributions and the dynamically changing interface thermodynamics. In this study, a sandwich composite anode consisting of gold nanoparticles pillared reduced graphene oxide (rGO) is designed. Because gold nanoparticles preferentially induce lithium nucleation, the typically uncontrolled lithium deposition process becomes a highly nucleation-guided process. Because the sandwich structure of the Au-pillared rGO provides a stable anode morphology with cycling and stabilizes the solid electrolyte interface layer, the Au-pillared rGO delivers a high Coulombic efficiency of up to 98% for at least 200 cycles for 1600 h. Using this pillared structure, an interlayer plating process is revealed in rGO-sandwiched anodes, which differ from either conventional metallic anodes or intercalation anodes. The Au-pillared design bridges the gap between metal and intercalation anodes, and provides a novel strategy to improve the efficiencies and cyclability of lithium anodes.

Original languageEnglish (US)
Article number1804133
JournalAdvanced Functional Materials
Volume28
Issue number41
DOIs
StatePublished - Oct 10 2018

Keywords

  • gold nanoparticles
  • intercalation
  • interlayer plating
  • lithium anodes
  • reduced graphene oxides

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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