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https://hdl.handle.net/2440/121886
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Type: | Journal article |
Title: | Long-life room-temperature sodium–sulfur batteries by virtue of transition-metal-nanocluster–sulfur interactions |
Author: | Zhang, B.-W. Sheng, T. Wang, Y.-X. Chou, S. Davey, K. Dou, S.-X. Qiao, S.-Z. |
Citation: | Angewandte Chemie International Edition, 2019; 58(5):1484-1488 |
Publisher: | Wiley Online Library |
Issue Date: | 2019 |
ISSN: | 1433-7851 1521-3773 |
Statement of Responsibility: | Bin‐Wei Zhang, Tian Sheng, Yun‐Xiao Wang, Shulei Chou, Kenneth Davey, Shi‐Xue Dou, Shi‐Zhang Qiao |
Abstract: | Room-temperature sodium-sulfur (RT-Na/S) batteries hold significant promise for large-scale application because of low cost of both sodium and sulfur. However, the dissolution of polysulfides into the electrolyte limits practical application. Now, the design and testing of a new class of sulfur hosts as transition-metal (Fe, Cu, and Ni) nanoclusters (ca. 1.2 nm) wreathed on hollow carbon nanospheres (S@M-HC) for RT-Na/S batteries is reported. A chemical couple between the metal nanoclusters and sulfur is hypothesized to assist in immobilization of sulfur and to enhance conductivity and activity. S@Fe-HC exhibited an unprecedented reversible capacity of 394 mAh g-1 despite 1000 cycles at 100 mA g-1 , together with a rate capability of 220 mAh g-1 at a high current density of 5 A g-1 . DFT calculations underscore that these metal nanoclusters serve as electrocatalysts to rapidly reduce Na2 S4 into short-chain sulfides and thereby obviate the shuttle effect. |
Keywords: | Na/S batteries electrocatalysts metal nanoclusters shuttle effect sulfur |
Rights: | © 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/anie.201811080 |
Grant ID: | http://purl.org/au-research/grants/arc/FL170100154 http://purl.org/au-research/grants/arc/DP160104866 http://purl.org/au-research/grants/arc/DP170104464 http://purl.org/au-research/grants/arc/DE170100928 |
Published version: | http://dx.doi.org/10.1002/anie.201811080 |
Appears in Collections: | Aurora harvest 4 Chemistry publications |
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