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    Capacity Retention Analysis in Aluminum-Sulfur Batteries

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    Type
    Article
    Authors
    Smajic, Jasmin cc
    Wee, Shianlin
    Simoes, Filipa R.Fernandes
    Hedhili, Mohamed N. cc
    Wehbe, Nimer
    Abou-Hamad, Edy
    Da Costa, Pedro M. F. J. cc
    KAUST Department
    Imaging and Characterization Core Lab
    Material Science and Engineering
    Material Science and Engineering Program
    NMR
    Physical Science and Engineering (PSE) Division
    Surface Science
    KAUST Grant Number
    (BAS/1/1346-01-01
    Date
    2020-06-15
    Online Publication Date
    2020-06-15
    Print Publication Date
    2020-07-27
    Submitted Date
    2020-04-22
    Permanent link to this record
    http://hdl.handle.net/10754/665141
    
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    Abstract
    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.0c00921
    Sponsors
    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 Materials
    DOI
    10.1021/acsaem.0c00921
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsaem.0c00921
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsaem.0c00921
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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