High‐energy SWCNT cathode for aqueous Al‐Ion battery boosted by multi‐ion intercalation chemistry
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The aqueous Al-ion battery has achieved great progress in recent years. It now shows comparable performance to that of even non-aqueous Al-ion batteries. However, it also shows relatively low energy output and there is limited general understanding of the mechanism behind this restriction to its practical application. Thus, the development of a high-performance cathode material is in great demand. Herein, a high-capacity single-walled carbon nanotube (SWCNT) is developed as a cathode for the water-in-salt electrolyte-based aqueous Al-ion battery, which provides an ultra-high specific capacity of 790 mAh g–1 (based on the mass of SWCNT) at a high current density of 5 A g–1 even after 1000 cycles. Moreover, the SWCNT/Al battery shows a complicated multi-ion intercalation mechanism, where AlCl4–, Cl–, Al3+, and H+ can function at the same time, improving the battery output. Beyond recently revealed H+ and metal ion co-intercalation, the Cl-assisted intercalation of Al3+ ions mechanism is also studied by experimental characterization and modeling for the first time, which significantly boosts the Al3+ storage capacity. This multi-ion intercalation mechanism combines the high-voltage anion deintercalation and the high-capacity cation intercalation, and thus, benefits the development and application of high-energy Al-ion batteries in the future.
Date Issued
2021-10-21
Date Acceptance
2021-08-01
Citation
Advanced Energy Materials, 2021, 11 (39), pp.1-13
ISSN
1614-6832
Publisher
Wiley
Start Page
1
End Page
13
Journal / Book Title
Advanced Energy Materials
Volume
11
Issue
39
Copyright Statement
© 2021 Wiley-VCH GmbHThis is the accepted version of the following article: [Pan, W., Zhao, Y., Mao, J., Wang, Y., Zhao, X., Leong, K. W., Luo, S., Liu, X., Wang, H., Xuan, J., Yang, S., Chen, Y., Leung, D. Y. C., High-Energy SWCNT Cathode for Aqueous Al-Ion Battery Boosted by Multi-Ion Intercalation Chemistry. Adv. Energy Mater. 2021], which has been published in final form at https://doi.org/10.1002/aenm.202101514
Identifier
https://onlinelibrary.wiley.com/doi/10.1002/aenm.202101514
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
aqueous Al-ion batteries
Cl-assisted intercalation
high-capacity cathodes
multi-ion chemistry
SWCNT cathodes
WALLED CARBON NANOTUBES
ELECTROCHEMICAL-BEHAVIOR
HIGH-VOLTAGE
ALUMINUM
CL
ELECTRODE
SPECTROSCOPY
SPECTRA
PERFORMANCE
MECHANISM
0303 Macromolecular and Materials Chemistry
0912 Materials Engineering
0915 Interdisciplinary Engineering
Publication Status
Published
Date Publish Online
2021-08-26