title: Na2S-carbon nanotube fabric electrodes for room-temperature sodium-sulfur batteries.
abstract: A unique sodium sulfide (Na2S) cathode is developed, which will allow the use of sodium-free anodes for room-temperature sodium-sulfur (Na-S) batteries. To overcome the "inert" nature of the Na2S, a special cathode structure is developed by spreading the multi-walled carbon nanotube (MWCNT)-wrapped Na2S particles onto MWCNT fabrics. Spectroscopic and electrochemical analyses reveal a series of polysulfide intermediates involved in the charge/discharge of the cell. The Na-S battery prepared in full discharge state with the Na2S/MWCNT cathode provides a remarkable capacity of 500 A h kg(-1) (based on sulfur mass) after 50 cycles.
authors: Electrochemical Energy Laboratory, Materials Science and Engineering Program, University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX, 78712 (USA).
authors: Xingwen
authors: X
authors: Yu
authors: Arumugam
authors: A
authors: Manthiram
keywords: carbon nanotube fabrics; cyclability; electrochemical performance; room-temperature sodium-sulfur batteries; sodium sulfide electrodes