Boron-doping-induced defect engineering enables high performance of a graphene cathode for aluminum batteries

Yiqun Du, Boya Zhang, Rongkai Kang, Wei Zhou, Wenyang Zhang, Huixin Jin, Jiaqi Wan*, Jianxin Zhang, Guowen Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Rechargeable aluminum batteries (RABs) have received significant interest due to the low cost, high volumetric capacity, and low flammability of aluminum. However, the paucity of reliable cathode materials poses substantial obstacles to the in-depth growth of RABs. Herein, defect engineering in virtue of boron doping is applied to the reduced graphene oxide as the cathode for RABs, endowing graphene with additional defects that improve the capacity and reaction kinetics of the electrode. Moreover, density functional theory (DFT) simulations confirm that the increased electronic conductivity, depressed diffusion barrier, and enhanced AlCl4- adsorption ability may be ascribed to the substitution of boron for carbon. In addition, the B-doped reduced graphene oxide (BG) operates by the intercalation/de-intercalation of AlCl4- upon the charge/discharge process. With these superior qualities, the cathode based on BG displays a high Al-storage capacity (259 mA h g-1 at 0.5 A g-1) and outstanding long-term stability (135 mA h g-1 at 5 A g-1 over 10 000 cycles) with a capacity decay of merely 0.0004% per cycle, one of the best performances among the state-of-the-art cathodes for RABs.

Original languageEnglish
Pages (from-to)925-934
Number of pages10
JournalInorganic Chemistry Frontiers
Volume9
Issue number5
DOIs
Publication statusPublished - 2022 Mar 7
Externally publishedYes

ASJC Scopus subject areas

  • Inorganic Chemistry

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