A Sugar-Derived Room-Temperature Sodium Sulfur Battery with Long Term Cycling Stability

作者：Carter Rachel; Oakes Landon; Douglas Anna; Muralidharan Nitin; Cohn Adam P; Pint Cary L^*

来源：Nano Letters, 2017, 17(3): 1863-1869.

DOI：10.1021/acs.nanolett.6b05172

• Sodium sulfur battery
• sulfur confinement
• microporous carbon
• sucrose-derived carbon
• room temperature
• ambient temperature

We demonstrate a room-temperature sodium sulfur battery based on a confining microporous carbon template derived from sucrose that delivers a reversible capacity over 700 mAh/gs at 0.1C rates, maintaining 370 mAh/gs at 10 times higher rates of 1C. Cycling at 1C rates reveals retention of over 300 mAh/gs capacity across 1500 cycles with Coulombic efficiency >98% due to microporous sulfur confinement and stability of the sodium metal anode in a glyme-based electrolyte. We show sucrose to be an ideal platform to develop microporous carbon capable of mitigating electrode-electrolyte reactivity and loss of soluble intermediate discharge products. In a manner parallel to the low-cost materials of the traditional sodium beta battery, our work demonstrates the combination of table sugar, sulfur, and sodium, all of which are cheap and earth abundant, for a high-performance stable room-temperature sodium sulfur battery.

• 出版日期2017-3