Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries
Despite having ultra-high theoretical specific capacity and theoretical energy density, lithium-sulfur (Li-S) batteries suffer from their low Coulombic efficiency and poor lifespan, and the commercial application of Li-S batteries is seriously hampered by the severe “shuttle effect” of lithium polys...
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MDPI AG
2023-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/11/4286 |
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| author | Jing Liu Yong Liu Tengfei Li Longlong Liang Sifan Wen Yue Zhang Guilong Liu Fengzhang Ren Guangxin Wang |
| author_facet | Jing Liu Yong Liu Tengfei Li Longlong Liang Sifan Wen Yue Zhang Guilong Liu Fengzhang Ren Guangxin Wang |
| author_sort | Jing Liu |
| collection | DOAJ |
| description | Despite having ultra-high theoretical specific capacity and theoretical energy density, lithium-sulfur (Li-S) batteries suffer from their low Coulombic efficiency and poor lifespan, and the commercial application of Li-S batteries is seriously hampered by the severe “shuttle effect” of lithium polysulfides (LiPSs) and the large volume expansion ratio of the sulfur electrode during cycling. Designing functional hosts for sulfur cathodes is one of the most effective ways to immobilize the LiPSs and improve the electrochemical performance of a Li-S battery. In this work, a polypyrrole (PPy)-coated anatase/bronze TiO<sub>2</sub> (TAB) heterostructure was successfully prepared and used as a sulfur host. Results showed that the porous TAB could physically adsorb and chemically interact with LiPSs during charging and discharging processes, inhibiting the LiPSs’ shuttle effect, and the TAB’s heterostructure and PPy conductive layer are conducive to the rapid transport of Li<sup>+</sup> and improve the conductivity of the electrode. By benefitting from these merits, Li-S batteries with TAB@S/PPy electrodes could deliver a high initial capacity of 1250.4 mAh g<sup>−1</sup> at 0.1 C and show an excellent cycling stability (the average capacity decay rate was 0.042% per cycle after 1000 cycles at 1 C). This work brings a new idea for the design of functional sulfur cathodes for high-performance Li-S battery. |
| first_indexed | 2024-03-11T03:01:28Z |
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| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T03:01:28Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-3e019814818b4b59b6fee2a1967bc6332023-11-18T08:14:34ZengMDPI AGMolecules1420-30492023-05-012811428610.3390/molecules28114286Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur BatteriesJing Liu0Yong Liu1Tengfei Li2Longlong Liang3Sifan Wen4Yue Zhang5Guilong Liu6Fengzhang Ren7Guangxin Wang8School of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaKey Laboratory of Function-Oriented Porous Materials of Henan Province, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Materials Science and Engineering, Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Henan University of Science and Technology, Luoyang 471023, ChinaDespite having ultra-high theoretical specific capacity and theoretical energy density, lithium-sulfur (Li-S) batteries suffer from their low Coulombic efficiency and poor lifespan, and the commercial application of Li-S batteries is seriously hampered by the severe “shuttle effect” of lithium polysulfides (LiPSs) and the large volume expansion ratio of the sulfur electrode during cycling. Designing functional hosts for sulfur cathodes is one of the most effective ways to immobilize the LiPSs and improve the electrochemical performance of a Li-S battery. In this work, a polypyrrole (PPy)-coated anatase/bronze TiO<sub>2</sub> (TAB) heterostructure was successfully prepared and used as a sulfur host. Results showed that the porous TAB could physically adsorb and chemically interact with LiPSs during charging and discharging processes, inhibiting the LiPSs’ shuttle effect, and the TAB’s heterostructure and PPy conductive layer are conducive to the rapid transport of Li<sup>+</sup> and improve the conductivity of the electrode. By benefitting from these merits, Li-S batteries with TAB@S/PPy electrodes could deliver a high initial capacity of 1250.4 mAh g<sup>−1</sup> at 0.1 C and show an excellent cycling stability (the average capacity decay rate was 0.042% per cycle after 1000 cycles at 1 C). This work brings a new idea for the design of functional sulfur cathodes for high-performance Li-S battery.https://www.mdpi.com/1420-3049/28/11/4286anatase/bronze TiO<sub>2</sub> heterostructurepolypyrroleLi-S batterieslithium polysulfides immobilizationelectrochemical performance |
| spellingShingle | Jing Liu Yong Liu Tengfei Li Longlong Liang Sifan Wen Yue Zhang Guilong Liu Fengzhang Ren Guangxin Wang Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries Molecules anatase/bronze TiO<sub>2</sub> heterostructure polypyrrole Li-S batteries lithium polysulfides immobilization electrochemical performance |
| title | Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries |
| title_full | Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries |
| title_fullStr | Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries |
| title_full_unstemmed | Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries |
| title_short | Efficient Regulation of Polysulfides by Anatase/Bronze TiO<sub>2</sub> Heterostructure/Polypyrrole Composites for High-Performance Lithium-Sulfur Batteries |
| title_sort | efficient regulation of polysulfides by anatase bronze tio sub 2 sub heterostructure polypyrrole composites for high performance lithium sulfur batteries |
| topic | anatase/bronze TiO<sub>2</sub> heterostructure polypyrrole Li-S batteries lithium polysulfides immobilization electrochemical performance |
| url | https://www.mdpi.com/1420-3049/28/11/4286 |
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