Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery
The Lithium sulfur (Li-S) battery has a great potential to replace lithium-ion batteries due to its high-energy density. However, the “shuttle effect” of polysulfide intermediates (Li<sub>2</sub>S<sub>8</sub>, Li<sub>2</sub>S<sub>6</sub>, Li<sub>...
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MDPI AG
2022-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/16/2752 |
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| author | Xiaotong Guo Xu Bi Junfeng Zhao Xinxiang Yu Han Dai |
| author_facet | Xiaotong Guo Xu Bi Junfeng Zhao Xinxiang Yu Han Dai |
| author_sort | Xiaotong Guo |
| collection | DOAJ |
| description | The Lithium sulfur (Li-S) battery has a great potential to replace lithium-ion batteries due to its high-energy density. However, the “shuttle effect” of polysulfide intermediates (Li<sub>2</sub>S<sub>8</sub>, Li<sub>2</sub>S<sub>6</sub>, Li<sub>2</sub>S<sub>4</sub>, etc.) from the cathode can lead to rapid capacity decay and low coulombic efficiency, thus limiting its further development. Anchoring polysulfide and inhibiting polysulfide migration in electrolytes is one of the focuses in Li-S battery. It is well known that polar metal oxides-manganese oxides (MnO<sub>2</sub>) are normally used as an effective inhibitor for its polysulfide inhibiting properties. Considering the natural 1D tunnel structure, MnO<sub>2</sub> with three kinds of typical tunnel-type were screened to study the effects of the tunnel size on the adsorption capacity of polysulfide. We found that MnO<sub>2</sub> with larger tunnel sizes has stronger chemisorption capacity of polysulfide. It promotes the conversion of polysulfide, and corresponding cathode exhibits better cycle reliability and rate performance in the cell comparison tests. This work should point out a new strategy for the cathode design of advanced Li-S battery by controlling the tunnel size. |
| first_indexed | 2024-03-09T12:51:05Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T12:51:05Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-84e2aba2f0ac414595574d98b25bd0c82023-11-30T22:06:20ZengMDPI AGNanomaterials2079-49912022-08-011216275210.3390/nano12162752Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur BatteryXiaotong Guo0Xu Bi1Junfeng Zhao2Xinxiang Yu3Han Dai4Laboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaLaboratory of Advanced Light Alloy Materials and Devices, Yantai Nanshan University, Longkou 265713, ChinaThe Lithium sulfur (Li-S) battery has a great potential to replace lithium-ion batteries due to its high-energy density. However, the “shuttle effect” of polysulfide intermediates (Li<sub>2</sub>S<sub>8</sub>, Li<sub>2</sub>S<sub>6</sub>, Li<sub>2</sub>S<sub>4</sub>, etc.) from the cathode can lead to rapid capacity decay and low coulombic efficiency, thus limiting its further development. Anchoring polysulfide and inhibiting polysulfide migration in electrolytes is one of the focuses in Li-S battery. It is well known that polar metal oxides-manganese oxides (MnO<sub>2</sub>) are normally used as an effective inhibitor for its polysulfide inhibiting properties. Considering the natural 1D tunnel structure, MnO<sub>2</sub> with three kinds of typical tunnel-type were screened to study the effects of the tunnel size on the adsorption capacity of polysulfide. We found that MnO<sub>2</sub> with larger tunnel sizes has stronger chemisorption capacity of polysulfide. It promotes the conversion of polysulfide, and corresponding cathode exhibits better cycle reliability and rate performance in the cell comparison tests. This work should point out a new strategy for the cathode design of advanced Li-S battery by controlling the tunnel size.https://www.mdpi.com/2079-4991/12/16/2752lithium sulfur batterymanganese oxidestunnel structurecathode materialsshuttle effect |
| spellingShingle | Xiaotong Guo Xu Bi Junfeng Zhao Xinxiang Yu Han Dai Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery Nanomaterials lithium sulfur battery manganese oxides tunnel structure cathode materials shuttle effect |
| title | Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery |
| title_full | Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery |
| title_fullStr | Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery |
| title_full_unstemmed | Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery |
| title_short | Tunnel Structure Enhanced Polysulfide Conversion for Inhibiting “Shuttle Effect” in Lithium-Sulfur Battery |
| title_sort | tunnel structure enhanced polysulfide conversion for inhibiting shuttle effect in lithium sulfur battery |
| topic | lithium sulfur battery manganese oxides tunnel structure cathode materials shuttle effect |
| url | https://www.mdpi.com/2079-4991/12/16/2752 |
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