Type
ArticleAuthors
Smajic, Jasmin
Wee, Shianlin
Simoes, Filipa R.Fernandes
Hedhili, Mohamed N.

Wehbe, Nimer
Abou-Hamad, Edy
Da Costa, Pedro M. F. J.

KAUST Department
Imaging and Characterization Core LabMaterial Science and Engineering
Material Science and Engineering Program
NMR
Physical Science and Engineering (PSE) Division
Surface Science
KAUST Grant Number
(BAS/1/1346-01-01Date
2020-06-15Online Publication Date
2020-06-15Print Publication Date
2020-07-27Submitted Date
2020-04-22Permanent link to this record
http://hdl.handle.net/10754/665141
Metadata
Show full item recordAbstract
The electrochemical performance of aluminum-sulfur batteries is beset by poor stability and sluggish charge-storage properties. To address these issues, carbon allotropes have been used as electrode fillers, but successful outcomes remain inexplicably elusive. Here, a composite of sulfur and small-diameter single-walled carbon nanotubes was studied as a cathode for AlCl3:[EMIM]-based aluminum batteries. The presence of carbon nanotubes, while enabling a high capacity (1024 mAh g-1) with slower decay and reducing the electrolyte-to-sulfur ratio, is insufficient to fully stabilize the cell's performance. In fact, the main obstacle is in the interaction between sulfur and chloroaluminate ions. As we show, there is a gradual buildup of insoluble and poorly conductive discharge products that inhibit the diffusion of electroactive ions and, ultimately, cause capacity decay. Overall, this work sheds light on the carbon-sulfur-electrolyte interactions and their role on the underlying charge-storage mechanism of aluminum-sulfur batteries.Citation
Smajic, J., Wee, S., Simoes, F. R. F., Hedhili, M. N., Wehbe, N., Abou-Hamad, E., & Costa, P. M. F. J. (2020). Capacity Retention Analysis in Aluminum-Sulfur Batteries. ACS Applied Energy Materials, 3(7), 6805–6814. doi:10.1021/acsaem.0c00921Sponsors
This work was funded by KAUST (BAS/1/1346-01-01). The authors thank the KAUST Core Labs for technical assistance.Publisher
American Chemical Society (ACS)Journal
ACS Applied Energy MaterialsAdditional Links
https://pubs.acs.org/doi/10.1021/acsaem.0c00921ae974a485f413a2113503eed53cd6c53
10.1021/acsaem.0c00921