Document Detail


Self-weaving sulfur-carbon composite cathodes for high rate lithium-sulfur batteries.
MedLine Citation:
PMID:  23033056     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Realization of a ubiquitous clean energy future depends critically on the efficient storage and utilization of renewable energies. Lithium-ion batteries are appealing in this regard, but low-cost, abundant, safe, high energy-density electrode materials need to be developed to adopt them. Here we present a sulfur-multi-wall carbon nanotube (MWCNT) composite cathode with high-rate cyclability by a facile binder/current collector-free fabrication process. The composite cathode exhibits high capacities of 1352 mAh g(-1) at 1C rate and 1012 mAh g(-1) at 4C rate. Due to the self-weaving behavior of MWCNTs, extra cell components such as binders and current collectors are rendered unnecessary, thereby streamlining the electrode manufacturing process and decreasing the cell weight. While the highly conductive MWCNTs improve the active material utilization at high rates, the absorption ability of the cathode framework localizes the electrolyte and suppresses the migration of soluble polysulfides. The cathode design and facile synthesis enhance the feasibility of practical high rate Li-S batteries.
Authors:
Yu-Sheng Su; Yongzhu Fu; Arumugam Manthiram
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-2
Journal Detail:
Title:  Physical chemistry chemical physics : PCCP     Volume:  -     ISSN:  1463-9084     ISO Abbreviation:  Phys Chem Chem Phys     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888160     Medline TA:  Phys Chem Chem Phys     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Electrochemical Energy Laboratory & Materials Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712, USA. rmanth@mail.utexas.edu.
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