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    Mesoporous Reduced Graphene Oxide as a High Capacity Cathode for Aluminum Batteries

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    201810_Small_SubmissionFile.pdf
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    1.068Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Smajic, Jasmin cc
    Alazmi, Amira cc
    Batra, Nitinkumar
    Palanisamy, Tamilarasan
    Anjum, Dalaver H.
    Da Costa, Pedro M. F. J. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Chemical Science Program
    Electron Microscopy
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    BAS/1/1346-01-01
    Date
    2018-10-25
    Online Publication Date
    2018-10-25
    Print Publication Date
    2018-12
    Permanent link to this record
    http://hdl.handle.net/10754/629532
    
    Metadata
    Show full item record
    Abstract
    Research in the field of aluminum batteries has focused heavily on electrodes made of carbonaceous materials. Still, the capacities reported for these multivalent systems remain stubbornly low. It is believed that a high structural quality of graphitic carbons and/or specific surface areas of >1000 m2 g-1 are key factors to obtain optimal performance and cycling stability. Here an aluminum chloride battery is presented in which reduced graphene oxide (RGO) powder, dried under supercritical conditions, is used as the active cathode material and niobium foil as the current collector. With a specific surface area of just 364 m2 g-1, the RGO enables a gravimetric capacity of 171 mAh g-1 at 100 mA g-1 and remarkable stability over a wide range of current densities (<15% decrease over 100 cycles in the interval 100–20000 mA g-1). These properties, up to now achieved only with much larger surface area materials, result from the cathode's tailored mesoporosity. The 20 nm wide mesopores facilitate the movement of the chloroaluminate ions through the RGO, effectively minimizing the inactive mass content of the electrode. This more than compensates for the ordinary micropore volume of the graphene powder.
    Citation
    Smajic J, Alazmi A, Batra N, Palanisamy T, Anjum DH, et al. (2018) Mesoporous Reduced Graphene Oxide as a High Capacity Cathode for Aluminum Batteries. Small: 1803584. Available: http://dx.doi.org/10.1002/smll.201803584.
    Sponsors
    This work was funded by KAUST (BAS/1/1346-01-01). The authors thank the Core Labs for technical assistance and Mr. H. Hwang, at the Research Publication Services, for the TOC illustration.
    Publisher
    Wiley
    Journal
    Small
    DOI
    10.1002/smll.201803584
    10.1002/smll.201870251
    Additional Links
    https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201803584
    ae974a485f413a2113503eed53cd6c53
    10.1002/smll.201803584
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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