A Microsized Cagelike Sulfur/Carbon Composite for a Lithium/Sulfur Battery with Excellent Performance. Issue 7 (14th May 2014)

• Record Type: Journal Article
• Authors: Wang, Meiri; Zhang, Yining; Zhang, Hongzhang; Zhang, Huamin
• Is Part Of: ChemPlusChem. Volume 79:Issue 7(2014:Jul.)
• Page Start: 919
• Page End: 924
• Publication Date: 2014-05-14
• Subjects: carbon -- charge transfer -- electrochemistry -- lithium -- sulfur; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201402021
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: A sulfur/carbon composite with a hollow cagelike configuration is synthesized and employed as a lithium/sulfur battery. The material provides a hierarchical porous structure with small pores in local regions and large pores connected to each other throughout the electrode. It exhibits a good polysulfide retention ability, promotes the efficient transfer of electrons and ions, and suppresses the redistribution of active material during cycles. Thus, the battery shows an improved rate performance, as well as a superior cycling stability of 94 % capacity retention, after 100 cycles at 0.5 C. Abstract : Charged and ready to go! Inspired by a popular traditional Chinese food (caramel treats, see picture), a hollow cagelike sulfur/carbon composite is developed for lithium/sulfur batteries. With good polysulfide retention ability and efficient electron and ion transfer, the battery exhibits a better rate performance.