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Electrochemical Performance of Graphitic Multi‐walled Carbon Nanotubes with Different Aspect Ratios as Cathode Materials for Aluminum‐ion Batteries
- Source :
- ChemistryOpen, Vol 9, Iss 8, Pp 812-817 (2020)
- Publication Year :
- 2020
- Publisher :
- Wiley-VCH, 2020.
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 21911363
- Volume :
- 9
- Issue :
- 8
- Database :
- Directory of Open Access Journals
- Journal :
- ChemistryOpen
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1dc5f3981a6b46cc81005c86d4d4deac
- Document Type :
- article
- Full Text :
- https://doi.org/10.1002/open.202000166