Electrochemical Performance of Graphitic Multi-walled Carbon Nanotubes with Different Aspect Ratios as Cathode Materials for Aluminum-ion Batteries

Lixue Hou, Haining Cao, Mei Han, Zichuan Lv, Shuai Zhou, Hui Chen, Huiping Du, Mian Cai, Yue Zhou, Chao Meng, Yinghui Bian, Meng Chang Lin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Graphitic multi-walled carbon nanotubes (MWCNTs) can function as high-performance cathode materials for rechargeable Al-ion batteries with well-defined discharging plateaus and reasonable charge/discharge C-rates. However, the main intercalation/deintercalation or adsorption/desorption path of AlCl4 anions into or onto G-MWCNTs has not been elucidated. Herein, we used battery cells comprised of G-MWCNTs with different aspect ratios, Al metal, and AlCl3/1-ethyl-3-methylimidazolium chloride ionic liquid as the cathode, anode, and electrolyte, respectively. The electrochemical performance of the Al||G-MWCNT cell increased as the aspect ratio of the G-MWCNT cathode increased (i. e., longer and thinner). The degree of defects of the G-MWCNTs was similar (0.15–0.22); hence, the results confirm that the main and alternate paths for the AlCl4 intercalation/de-intercalation or adsorption/desorption into/from or onto/from the G-MWCNT are the basal and edge planes, respectively. The step-like structures of defects on the basal plane provide the main reaction site for AlCl4 anions.

Original languageEnglish
Pages (from-to)812-817
Number of pages6
JournalChemistryOpen
Volume9
Issue number8
DOIs
Publication statusPublished - Aug 2020
Externally publishedYes

Keywords

  • aluminum
  • aspect ratio
  • cathod materials
  • multi-walled carbon nanotubes
  • reaction mechanisms

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint

Dive into the research topics of 'Electrochemical Performance of Graphitic Multi-walled Carbon Nanotubes with Different Aspect Ratios as Cathode Materials for Aluminum-ion Batteries'. Together they form a unique fingerprint.

Cite this