Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery
With a higher theoretical specific capacity (1675 mAh g<sup>−1</sup>) and energy density (2600 Wh kg<sup>−1</sup>), the lithium-sulfur (Li-S) battery is considered as a promising candidate for a next-generation energy storage device. However, the shuttle effect of polysulfide...
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MDPI AG
2021-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/8/1979 |
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| author | Zekun Deng Zhenyang Zheng Wenhong Ruan Mingqiu Zhang |
| author_facet | Zekun Deng Zhenyang Zheng Wenhong Ruan Mingqiu Zhang |
| author_sort | Zekun Deng |
| collection | DOAJ |
| description | With a higher theoretical specific capacity (1675 mAh g<sup>−1</sup>) and energy density (2600 Wh kg<sup>−1</sup>), the lithium-sulfur (Li-S) battery is considered as a promising candidate for a next-generation energy storage device. However, the shuttle effect of polysulfides as well as the large interfacial impedance between brittle solid electrolyte and electrodes lead to the capacity of the Li-S battery decaying rapidly, which limits the practical commercial applications of the Li-S battery. Herein, we reported a facile in situ ultraviolet (UV) curing method to prepare a flexible quasi-solid-state composite electrolyte (QSSCE) of poly(propylene glycol)-co-pentaerythritol triacrylate/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> (PPG-co-PETA/LAGP). By combining the high Li-ion conductivity and mechanical strength of inorganic NASICON-structure LAGP and good flexibility of the crosslinked PPG-co-PETA with nanopore structure, the flexible QSSCE with 66.85 wt% LAGP exhibited high Li-ion conductivity of 5.95 × 10<sup>−3</sup> S cm<sup>−1</sup> at 25 °C, Li-ion transference number of 0.83 and wide electrochemical window of ~5.0 V (vs. Li/Li<sup>+</sup>). In addition, the application of QSSCE in the Li-S battery could suppress the shuttle effect of polysulfides effectively, thus the Li-S battery possessed the excellent electrochemical cyclic performance, showing the first-cycle discharge-specific capacity of 1508.1 mAh g<sup>−1</sup>, the capacity retention of 73.6% after 200 cycles with 0.25 C at 25 °C and good rate performance. |
| first_indexed | 2024-03-10T12:18:20Z |
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| id | doaj.art-5d51beae5db545008d4ff0bf50f17bea |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T12:18:20Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5d51beae5db545008d4ff0bf50f17bea2023-11-21T15:41:47ZengMDPI AGMaterials1996-19442021-04-01148197910.3390/ma14081979Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur BatteryZekun Deng0Zhenyang Zheng1Wenhong Ruan2Mingqiu Zhang3Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, ChinaKey Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, ChinaKey Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, ChinaKey Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, ChinaWith a higher theoretical specific capacity (1675 mAh g<sup>−1</sup>) and energy density (2600 Wh kg<sup>−1</sup>), the lithium-sulfur (Li-S) battery is considered as a promising candidate for a next-generation energy storage device. However, the shuttle effect of polysulfides as well as the large interfacial impedance between brittle solid electrolyte and electrodes lead to the capacity of the Li-S battery decaying rapidly, which limits the practical commercial applications of the Li-S battery. Herein, we reported a facile in situ ultraviolet (UV) curing method to prepare a flexible quasi-solid-state composite electrolyte (QSSCE) of poly(propylene glycol)-co-pentaerythritol triacrylate/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> (PPG-co-PETA/LAGP). By combining the high Li-ion conductivity and mechanical strength of inorganic NASICON-structure LAGP and good flexibility of the crosslinked PPG-co-PETA with nanopore structure, the flexible QSSCE with 66.85 wt% LAGP exhibited high Li-ion conductivity of 5.95 × 10<sup>−3</sup> S cm<sup>−1</sup> at 25 °C, Li-ion transference number of 0.83 and wide electrochemical window of ~5.0 V (vs. Li/Li<sup>+</sup>). In addition, the application of QSSCE in the Li-S battery could suppress the shuttle effect of polysulfides effectively, thus the Li-S battery possessed the excellent electrochemical cyclic performance, showing the first-cycle discharge-specific capacity of 1508.1 mAh g<sup>−1</sup>, the capacity retention of 73.6% after 200 cycles with 0.25 C at 25 °C and good rate performance.https://www.mdpi.com/1996-1944/14/8/1979lithium sulfur batteryquasi-solid-state composite electrolytepolysulfides shuttle effectLi-ion conductivitycycling performance |
| spellingShingle | Zekun Deng Zhenyang Zheng Wenhong Ruan Mingqiu Zhang Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery Materials lithium sulfur battery quasi-solid-state composite electrolyte polysulfides shuttle effect Li-ion conductivity cycling performance |
| title | Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery |
| title_full | Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery |
| title_fullStr | Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery |
| title_full_unstemmed | Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery |
| title_short | Flexible Quasi-Solid-State Composite Electrolyte of Poly (Propylene Glycol)-co-Pentaerythritol Triacry-Late/Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> for High-Performance Lithium-Sulfur Battery |
| title_sort | flexible quasi solid state composite electrolyte of poly propylene glycol co pentaerythritol triacry late li sub 1 5 sub al sub 0 5 sub ge sub 1 5 sub po sub 4 sub sub 3 sub for high performance lithium sulfur battery |
| topic | lithium sulfur battery quasi-solid-state composite electrolyte polysulfides shuttle effect Li-ion conductivity cycling performance |
| url | https://www.mdpi.com/1996-1944/14/8/1979 |
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