Synthesis Design of Bimetallic Selenide NiCoSe2@F-Doped C with Core-Shell Structure as Cathode for Advanced Rechargeable Aluminum Batteries

Rongkai Kang, Yiqun Du, Wei Zhou, Dongmei Zhang, Wenyang Zhang, Jiaqi Wan, Guowen Chen*, Jianxin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Rechargeable aluminum batteries (RABs) have been considered as a potential candidate for next-generation energy storage systems because of their high security, abundant resources, and high specific capacity. However, the poor cycling performance and sluggish reaction kinetics hinder the practical application of RABs. In this paper, an electrode material of NiCo bimetallic selenide nanospheres embedded in fluorine-doped carbon (NiCoSe2@F-C) has been designed for enhancing electrochemical performance. NiCoSe2@F-C doping with heterogeneous elements presented a stable core-shell structure and large surface area, playing a significant role in improving the cycling ability, specific capacity, and electrochemical reaction kinetics for RABs. The RABs based on NiCoSe2@F-C cathode exhibit high reversible capacity (294 mAh g-1at 0.5 A g-1) and excellent cycle performance (115 mAh g-1at 1 A g-1over 400 cycles). It is confirmed that the charge storage mechanism of the NiCoSe2@F-C electrode is the intercalation/deintercalation of AlCl4-with the charge/discharge processes jointly controlled by capacitance and diffusion. This work provides an effective approach for further developing advanced cathodes of RABs with excellent electrochemical performance.

Original languageEnglish
Pages (from-to)10287-10296
Number of pages10
JournalACS Applied Energy Materials
Volume5
Issue number8
DOIs
Publication statusPublished - 2022 Aug 22
Externally publishedYes

Keywords

  • aluminum batteries
  • bimetallic selenides
  • cathode materials
  • core-shell structure
  • fluorine-doped

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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