Nanoporous Carbon Coatings Direct Li Electrodeposition Morphology and Performance in Li Metal Anode Batteries: Article No. 10

Katharine Harrison, Subrahmanyam Goriparti, Daniel Long, Rachel Martin, Benjamin Warren, Laura Merrill, Matthaeus Wolak, Alexander Sananes, Michael Siegal

Research output: Contribution to journalArticlepeer-review

Abstract

Li metal anodes could significantly improve battery energy density. However, Li generally electrodeposits in poorly controlled morphology, leading to safety and performance problems. One factor that controls Li anode performance and electrodeposition morphology is the nature of the electrolyte-current collector interface. Herein, we modify the Cu current collector interface by depositing precisely controlled nanoporous carbon (NPC) coatings using pulsed laser deposition to develop an understanding of how NPC coating density and thickness impact Li electrodeposition. We find that NPC density and thickness guide Li morphological evolution differently and dictate whether Li deposits at the NPC-Cu or NPC-electrolyte interface. NPC coatings generally lower overpotential for Li electrodeposition, though thicker NPC coatings limit kinetics when cycling at a high rate. Lower-density NPC enables the highest Coulombic efficiency (CE) during calendar aging tests, and higher-density NPC enables the highest CE during cycling tests.
Original languageAmerican English
Number of pages24
JournalBatteries
Volume11
Issue number1
DOIs
StatePublished - 2025

NREL Publication Number

  • NREL/JA-5K00-90844

Keywords

  • artificial solid electrolyte interphase
  • batteries
  • graphene
  • lithium metal anode
  • nanoporous carbon
  • pulsed laser deposition

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