Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-03116-z
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Funding
- Wenzhou University
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
- Concordia University
- National Natural Science Foundation of China [21471116, 51772219]
- Zhejiang Provincial Natural Science Foundation of China [LY17E02002]
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy through the Advanced Battery Materials Research (BMR) Program (Battery500 Consortium)
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- DOE Office of Science [DE-AC02-06CH11357]
- NRF [NRF-2017R1D1A1B04031539]
- development program of KIER [B7-2425]
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Lithium-sulfur battery possesses high energy density but suffers from severe capacity fading due to the dissolution of lithium polysulfides. Novel design and mechanisms to encapsulate lithium polysulfides are greatly desired by high-performance lithium-sulfur batteries towards practical applications. Herein, we report a strategy of utilizing anthraquinone, a natural abundant organic molecule, to suppress dissolution and diffusion of polysulfides species through redox reactions during cycling. The keto groups of anthraquinone play a critical role in forming strong Lewis acid-based chemical bonding. This mechanism leads to a long cycling stability of sulfur-based electrodes. With a high sulfur content of similar to 73%, a low capacity decay of 0.019% per cycle for 300 cycles and retention of 81.7% over 500 cycles at 0.5 C rate can be achieved. This finding and understanding paves an alternative avenue for the future design of sulfur-based cathodes toward the practical application of lithium-sulfur batteries.
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