Journal
CARBON
Volume 79, Issue -, Pages 302-309Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.07.071
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Funding
- German Research Foundation (DFG) [SPP 1473]
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We report on the synthesis of new metal-organic framework derived carbons using a two-step process employing for the first time a commercially available iron-containing metal-organic framework. The resulting carbons consist mainly of highly graphitic shells due to the highly dispersed iron in the precursor structure which catalyzes the formation of graphitic carbon. In addition, a distinct onion-like morphology is observed, with high total pore volumes of up to 1 cc/g and a hierarchically structured porosity in which the hollow cores of the carbon onions are accessible via smaller micro- and mesopores. As a proof of concept we furthermore demonstrate the inherent structure of this carbon being advantageous for the application in lithium-sulfur batteries as a both confining and contacting host for the active material, yielding capacities of up to 550 mAh/g after 40 cycles. (C) 2014 Elsevier Ltd. All rights reserved.
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