Academic Journal
Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery
| Title: | Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery |
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| Authors: | Shuhao Tian, Qi Zeng, Guo Liu, Juanjuan Huang, Xiao Sun, Di Wang, Hongcen Yang, Zhe Liu, Xichao Mo, Zhixia Wang, Kun Tao, Shanglong Peng |
| Source: | Nano-Micro Letters, Vol 14, Iss 1, Pp 1-15 (2022) |
| Publisher Information: | SpringerOpen, 2022. |
| Publication Year: | 2022 |
| Collection: | LCC:Technology |
| Subject Terms: | MXenes, Transition metal sulfides, Lithium-ion transference, Bifunctional catalysis, Reaction kinetics, Technology |
| More Details: | Abstract The shuttle effect of soluble lithium polysulfides (LiPSs) between electrodes and slow reaction kinetics lead to extreme inefficiency and poor high current cycling stability, which limits the commercial application of Li–S batteries. Herein, the multi-dimensional composite frame has been proposed as the modified separator (MCCoS/PP) of Li–S battery, which is composed of CoS2 nanoparticles on alkali-treated MXene nanosheets and carbon nanotubes. Both experiments and theoretical calculations show that bifunctional catalytic activity can be achieved on the MCCoS/PP separator. It can not only promote the liquid–solid conversion in the reduction process, but also accelerate the decomposition of insoluble Li2S in the oxidation process. In addition, LiPSs shuttle effect has been inhibited without a decrease in lithium-ion transference numbers. Simultaneously, the MCCoS/PP separator with good LiPSs adsorption capability arouses redistribution and fixing of active substances, which is also beneficial to the rate performance and cycling stability. The Li–S batteries with the MCCoS/PP separator have a specific capacity of 368.6 mAh g−1 at 20C, and the capacity decay per cycle is only 0.033% in 1000 cycles at 7C. Also, high area capacity (6.34 mAh cm−2) with a high sulfur loading (7.7 mg cm−2) and a low electrolyte/sulfur ratio (7.5 μL mg−1) is achieved. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2311-6706 2150-5551 |
| Relation: | https://doaj.org/toc/2311-6706; https://doaj.org/toc/2150-5551 |
| DOI: | 10.1007/s40820-022-00941-2 |
| Access URL: | https://doaj.org/article/64f36580b38d47f5a0a68e8b8ba4ff99 |
| Accession Number: | edsdoj.64f36580b38d47f5a0a68e8b8ba4ff99 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 23116706 21505551 |
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| DOI: | 10.1007/s40820-022-00941-2 |
| Published in: | Nano-Micro Letters |
| Language: | English |