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Research Article

Defect engineering on carbon black for accelerated Li-S chemistry

Wenlong Cai1, Yingze Song2( ), Yuting Fang1, Weiwei Wang1, Songlin Yu2, Huaisheng Ao1, Yongchun Zhu1( ), Yitai Qian1
Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
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Abstract

Rationally designing sulfur hosts with the functions of confining lithium polysulfides (LiPSs) and promoting sulfur reaction kinetics is critically important to the real implementation of lithium-sulfur (Li-S) batteries. Herein, the defect-rich carbon black (CB) as sulfur host was successfully constructed through a rationally regulated defect engineering. Thus-obtained defect-rich CB can act as an active electrocatalyst to enable the sulfur redox reaction kinetics, which could be regarded as effective inhibitor to alleviate the LiPS shuttle. As expected, the cathode consisting of sulfur and defect-rich CB presents a high rate capacity of 783.8 mA·h·g-1 at 4 C and a low capacity decay of only 0.07% per cycle at 2 C over 500 cycles, showing favorable electrochemical performances. The strategy in this investigation paves a promising way to the design of active electrocatalysts for realizing commercially viable Li-S batteries.

Keywords

defect engineeringLi-S chemistrycarbon blacksulfur reaction kinetics

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Nano Research
Volume 13 Issue 12,
December 2020
Pages 3315-3320
DOI: 10.1007/s12274-020-3009-0
Cite this article:
Cai W, Song Y, Fang Y, et al. Defect engineering on carbon black for accelerated Li-S chemistry. Nano Research, 2020, 13(12): 3315-3320. https://doi.org/10.1007/s12274-020-3009-0
Topics:
Carbon blackDefectsElectrocatalystsLithium batteriesLithium compoundsLithium sulfur batteriesPhosphorus compoundsRedox reactionsSulfur compounds

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Received: 09 May 2020
Revised: 23 July 2020
Accepted: 26 July 2020
Published: 02 September 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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