Sandwich-Structured Ordered Mesoporous Polydopamine/MXene Hybrids as High-Performance Anodes for Lithium-Ion Batteries

Tao Li, Bing Ding, Jie Wang, Zongyi Qin, Joseph F.S. Fernando, Yoshio Bando, Ashok Kumar Nanjundan, Yusuf Valentino Kaneti, Dmitri Golberg, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Organic polymers have attracted significant interest as electrodes for energy storage devices because of their advantages, including molecular flexibility, cost-effectiveness, and environmentally friendly nature. Nevertheless, the real implementation of polymer-based electrodes is restricted by their poor stability, low capacity, and slow electron-transfer/ion diffusion kinetics. In this work, a sandwich-structured composite of ordered mesoporous polydopamine (OMPDA)/Ti3C2Tx has been fabricated by in situ polymerization of dopamine on the surface of Ti3C2Tx via employing the PS-b-PEO block polymer as a soft template. The OMPDA layers with vertically oriented, accessible nanopores (âˆ20 nm) provide a continuous pore channel for ion diffusion, while the Ti3C2Tx layers guarantee a fast electron-transfer path. The OMPDA/Ti3C2Tx composite anode exhibits high reversible capacity, good rate performance, and excellent cyclability for lithium-ion batteries. The in situ transmission electron microscopy analysis reveals that the OMPDA in the composite only shows a small volume expansion and almost preserves the initial morphology during lithiation. Moreover, these in situ experiments also demonstrate the generation of a stable and ultrathin solid electrolyte interphase layer surrounding the active material, which acts as an electrode protective film during cycling. This study demonstrates the method to develop polymer-based electrodes for high-performance rechargeable batteries.

Original languageEnglish
Pages (from-to)14993-15001
Number of pages9
JournalACS Applied Materials and Interfaces
Volume12
Issue number13
DOIs
Publication statusPublished - 2020 Apr 1
Externally publishedYes

Keywords

  • MXene
  • in situ transmission electron microscopy
  • lithium-ion batteries
  • ordered mesoporous polydopamine
  • sandwich structure

ASJC Scopus subject areas

  • Materials Science(all)

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