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Ionic has developed lithium sulphur (Li-S) battery technology as...

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    Ionic has developed lithium sulphur (Li-S) battery technology as a near-term commercial technology. Potential investors and partners have identified Ionic’s Li-S technology as one of the most exciting elements of Ionic’s portfolio.
    In our next phase of growth, we will focus on establishing strategic relationships with industry partners to commercialise its first-generation lithium sulphur battery technology

    http://www.ionicindustries.com.au/company-news-and-progress-update/

    Suppressed Polysulfide Crossover in Li–S Batteries through a High-Flux Graphene Oxide Membrane Supported on a Sulfur Cathode

    Mahdokht Shaibani, Abozar Akbari, Phillip Sheath, Christopher D. Easton, Parama Chakraborty Banerjee, Kristina Konstas, Armaghan Fakhfouri, Marzieh Barghamadi§, Mustafa M. Musameh, Adam S. Best, Thomas Rüther, Peter J. Mahon§, Matthew R. Hill*, Anthony F. Hollenkamp*, and Mainak Majumder*
    Nanoscale Science and Engineering Laboratory (NSEL), Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3168, Australia
    CSIRO, Clayton, VIC 3168, Australia
    § Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
    Department of Chemical Engineering, Monash University, Clayton, VIC 3168, Australia
    ACS Nano, 2016, 10 (8), pp 7768–7779
    DOI: 10.1021/acsnano.6b03285
    Publication Date (Web): July 11, 2016
    Copyright © 2016 American Chemical Society
    *E-mail: [email protected]., *E-mail: [email protected]., *E-mail: [email protected].
    Abstract


    Utilization of permselective membranes holds tremendous promise for retention of the electrode-active material in electrochemical devices that suffer from electrode instability issues. In a rechargeable Li–S battery—a strong contender to outperform the Li-ion technology—migration of lithium polysulfides from the sulfur cathode has been linked to rapid capacity fading and lower Coulombic efficiency. However, the current approaches for configuring Li–S cells with permselective membranes suffer from large ohmic polarization, resulting in low capacity and poor rate capability. To overcome these issues, we report the facile fabrication of a high-flux graphene oxide membrane directly onto the sulfur cathode by shear alignment of discotic nematic liquid crystals of graphene oxide (GO). In conjunction with a carbon-coated separator, the highly ordered structure of the thin (∼0.75 μm) membrane and its inherent surface charge retain a majority of the polysulfides, enabling the cells to deliver very high initial discharge capacities of 1063 and 1182 mAh gelectrode–1 for electrodes with 70 and 80% sulfur content, respectively, at the practical 0.5 C rate. The very high sulfur utilization and impressive capacity retentions of the high sulfur content electrodes result in some of the highest performance metrics in the literature of Li–S (e.g., electrode capacity of 835 mAh gelectrode–1 after 100 cycles at 0.5 C with a sulfur content of 80%). We show that the structural order of the shear-aligned GO membrane is key in maintaining good kinetics of the charge transfer processes in Li–S batteries.
    Keywords:

    high sulfur content; lithium−sulfur battery; polysulfide retention; shear-aligned graphene oxide membrane

    http://pubs.acs.org/doi/abs/10.1021/acsnano.6b03285

    Invariably some ones misfortune, is some one else's good luck, samsung may just have given Ionic a big boost.

    Raider
 
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