Na2S–Carbon Nanotube Fabric Electrodes for Room‐Temperature Sodium–Sulfur Batteries |
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| Authors: | Dr Xingwen Yu Prof Arumugam Manthiram |
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| Affiliation: | Electrochemical Energy Laboratory, Materials Science and Engineering Program, University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX, 78712 (USA) |
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| 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. |
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| Keywords: | carbon nanotube fabrics cyclability electrochemical performance room‐temperature sodium– sulfur batteries sodium sulfide electrodes |
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