Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 8, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201702381
Keywords
lithium sulfur batteries; multidirectional ion pathways; porous carbon sheets; reaction kinetics
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Natural Science Foundation [21573083]
- University of Waterloo
- Waterloo Institute for Nanotechnology
- China Scholarship Council (CSC)
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In this work, unique porous carbon sheets (PCSs) are developed via a facile synthesis. The obtained PCS delivers long-range conductive framework, abundant active interfaces, rich element doping, and notably a high inner porosity that builds up an admirable 3D network for multidirectional ion transfer. Such unique architecture and surface chemistry enable ultrafast sulfur electrochemistry as well as high-efficiency inhibition on polysulfide shuttling via the dually physical and chemical sulfur confinement. The PCS-based sulfur electrodes achieve superb rate capability up to 10 C, outstanding cyclability over 1000 cycles, and high areal capacity of 4.8 mA h cm(-2). This work offers an appealing model of material engineering for fast and reliable lithium-sulfur batteries, as well as guidance for rational structural design in extended energy storage and conversion systems.
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