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Issue 5, 2017
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A phenyl disulfide@CNT composite cathode for rechargeable lithium batteries

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Abstract

Rechargeable lithium batteries are playing an important role in portable electronics, electric vehicles, and renewable energy storage. Cathode materials in lithium batteries are mainly inorganic; however, some organic materials are also promising for these applications due to their diversified properties. Organosulfides are a unique class of materials which are low cost, abundant, and could provide high capacities. In this work, a phase extraction technique is used to prepare a core–sheath structured composite consisting of carbon nanotubes (CNTs) coated with a layer of phenyl disulfide (PDS, C6H5SSC6H5), which is designated as PDS@CNT. It forms a free-standing and binder-free paper which can be made in a scalable way with high mass loading. In lithium batteries, the S–S bonds in the composite can reversibly break and form in the CNT matrix, enabling good cycling performance. The half-cell can maintain a stable open circuit voltage over a week and deliver a specific capacity of 218 mA h g−1 at 1C while retaining 70% of the initial capacity after 150 cycles.

Graphical abstract: A phenyl disulfide@CNT composite cathode for rechargeable lithium batteries

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Publication details

The article was received on 09 Mar 2017, accepted on 09 May 2017 and first published on 11 May 2017


Article type: Communication
DOI: 10.1039/C7SE00135E
Citation: Sustainable Energy Fuels, 2017,1, 1007-1012
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    A phenyl disulfide@CNT composite cathode for rechargeable lithium batteries

    A. Bhargav, S. V. Patil and Y. Fu, Sustainable Energy Fuels, 2017, 1, 1007
    DOI: 10.1039/C7SE00135E

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