Dynamic intelligent cu current collectors for ultrastable lithium metal anodes

Jianyu Chen, Jin Zhao, Linna Lei, Pan Li*, Jun Chen, Yu Zhang, Yizhou Wang, Yanwen Ma, Dan Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

Three-dimensional (3D) current collectors have shown great potential in realizing dendrite-free lithium (Li) metal anodes. However, the rigid 3D current collectors could not simultaneously suppress Li dendrite growth and allow Li plating/stripping under high capacities and large current densities. Here, we report a dynamic intelligent Cu (DICu) current collector that dynamically accommodates the volume change by changing the packing density of the assembled particles. The Li/DICu electrode achieves a high Coulombic efficiency of 99.6% after 800 cycles. The symmetrical cell shows exceptional cycling stability under the high current density of 10 mA cm-2. Notably, when assembled in full-cell batteries, the Li/DICu|LiFePO4 battery maintains a specific capacity of 139.5 mAh g-1 at 1 C for 500 cycles, and the Li/DICu|S battery delivers a specific capacity of 804 mAh g-1 after 500 cycles at 0.5 C, corresponding to the best performance among Li metal batteries with Cu-based current collectors to date.

Original languageEnglish (US)
Pages (from-to)3403-3410
Number of pages8
JournalNano Letters
Volume20
Issue number5
DOIs
StatePublished - May 13 2020

Keywords

  • Cu current collectors
  • Dynamic intelligent structure
  • Li dendrites
  • Li metal anodes
  • Ultrastable performance

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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