High-voltage lithium-metal battery with three-dimensional mesoporous carbon anode host and ether/carbonate binary electrolyte

Egy Adhitama, Purna Chandra Rath, Achmad Prayogi, Jagabandhu Patra, Tai Chou Lee, Ju Li, Jeng Kuei Chang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Electrolyte recipes and Li metal anode host materials are developed for lithium-metal batteries. 1,2-dimethoxyethane/ethylene carbonate mixed solvent with 1 M lithium bis(fluorosulfonyl)imide and 1 wt% LiNO3 is shown to form a robust solid electrolyte interphase and improve Coulombic efficiency and cyclability during Li metal plating/stripping. This electrolyte can withstand high potential, allowing the operation of a LiNi0.8Co0.1Mn0.1O2 (NMC-811) cathode. One-dimensional carbon nanotubes, two-dimensional graphene nanosheets, and three-dimensional ordered mesoporous carbon CMK-8 are used as the host materials for the accommodation of Li metal. The strong and continuous conducting network of CMK-8 with interpenetrating open channels is found to be a promising scaffold for Li metal. With the proposed electrolyte, the CMK-8 electrode enables uniform Li plating/stripping with a high Coulombic efficiency of 99.2% under a practical current density of 1 mA cm−2. Moreover, a long life of >550 charge-discharge cycles is achieved. The high structural stability of CMK-8 upon cycling is confirmed using electron microscopy and Raman spectroscopy. Finally, we use a Li-free CMK-8 electrode, an NMC-811 cathode, and the proposed electrolyte to construct a full cell. The electrochemical properties are evaluated.

Original languageEnglish
Pages (from-to)752-763
Number of pages12
JournalCarbon
Volume184
DOIs
StatePublished - 30 Oct 2021

Keywords

  • Anode architecture
  • Electrolyte design
  • Full cell
  • High energy density
  • Ni-rich cathode

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