MOF-derived hierarchical porous carbon octahedrons for aluminum-ion batteries

Lei Wang, Guoyin Zhu, Yinghong Lin, Yi Wang, Qinshu Zhu, Zhihui Dai

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Rechargeable aluminum-ion batteries (AIBs) have aroused increasing interest due to good safety and economy, together with high theoretical volumetric capacities. Graphitized carbon materials and urea-based ionic liquid (IL) have been demonstrated as promising cathode materials and electrolyte of AIBs for high discharging voltage and low cost. Here we performed in situ Raman spectroscopy to investigate the reaction mechanism of Al/graphite in AlCl3/urea mixture IL electrolyte. The experimental evidences demonstrated that poor reaction kinetics of graphite cathode in urea-based IL at room temperature restricts the rate performance and further applications. In this work, we presented hierarchical porous carbon octahedrons (HPCO) derived from Cu-based metal organic framework (MOF) as a promising cathode material of AIBs. Advanced scanning electron microscopy (SEM) technologies were employed to reveal the hierarchical porous architecture. Benefited from the unique hierarchical porous structure and robust graphitic carbon nature, the Al/HPCO batteries exhibited a well-maintained specific capacity of ∼60.8 mA h g−1 after charge/discharge 200 cycles at a current density of 100 mA g−1 and a much better rate performance than graphite paper (GP) electrodes. This may provide extensive solutions to future research on AIBs and practical applications of AIBs technically.

Original languageEnglish
Pages (from-to)305-313
Number of pages9
JournalCarbon
Volume202
DOIs
StatePublished - 15 Jan 2023
Externally publishedYes

Keywords

  • Aluminum-ion batteries
  • High rate
  • In situ Raman
  • Metal-organic frame
  • Porous carbon

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