Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 24, Pages 11260-11269Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta03012j
Keywords
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Funding
- National Natural Science Foundation of China [61574091]
- Natural Science Foundation of Shanghai [17ZR1414100]
- Research Center of DC Science AMP
- Technology Co. Ltd.
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The design and scalable construction of unique ordered structures, which can ensure efficient polysulfide-retention for ultralong-cycle-life lithium-sulfur (Li-S) batteries, are desirable but challenging for high-performance Li-S batteries. Herein, we demonstrate a novel ordered structure based on ZnO nanoprism-arrays (ZnO NAs) in N-doped carbon foam nanoplates (NCFNs) threaded with multi-walled carbon nanotubes (MWCNTs) and its facile construction to successfully address the above-mentioned challenges. The as-designed ordered architectures can not only load a high content of sulfur (90 wt% for NCFN-MWCNTs), but also suppress polysulfide dissolution via the synergistic effect of the ZnO NAs and NCFNs. Specifically, the electrode based on NCFN-ZnO-MWCNTs with a 70 wt% loading of sulfur delivers an initial specific discharge capacity of 1249.4 mA h g(-1) at a 0.5C rate and shows exceptional reversible capacities of 1026.7, 887.5 and 698.6 mA h g(-1) at 1, 2 and 5C rates, respectively. Moreover, the electrode exhibits an ultra-low capacity fade rate of 0.032% per cycle during 500 cycles with an average coulombic efficiency of over 99% at a 2C rate. We believe that this rational design of cathodes with unique ordered architectures and their scalable construction can provide an invaluable insight in the development of high-performance Li-S batteries for practical applications.
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