Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode
Reduced graphene oxide (rGO) encapsulated sulfur spheres for the Li-S batteries were prepared via the redox reaction between sodium polysulfide. XRD spectra showed that the diffraction peak of graphite oxide (GO) at 10° disappeared, while the relatively weak diffraction peak at 27° belongs to graphe...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-01-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379716305770 |
| _version_ | 1818287182106853376 |
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| author | Feiyan Liu Jiyuan Liang Chang Zhang Liang Yu Jinxing Zhao Chang Liu Qian Lan Shengrui Chen Yuan-Cheng Cao Guang Zheng |
| author_facet | Feiyan Liu Jiyuan Liang Chang Zhang Liang Yu Jinxing Zhao Chang Liu Qian Lan Shengrui Chen Yuan-Cheng Cao Guang Zheng |
| author_sort | Feiyan Liu |
| collection | DOAJ |
| description | Reduced graphene oxide (rGO) encapsulated sulfur spheres for the Li-S batteries were prepared via the redox reaction between sodium polysulfide. XRD spectra showed that the diffraction peak of graphite oxide (GO) at 10° disappeared, while the relatively weak diffraction peak at 27° belongs to graphene emerged. FT-IR spectra showed that the vibrations of the functional groups of GO, such as 3603 cm−1, 1723 cm−1and 1619 cm−1 which contributed from OH, COC and CO respectively, disappeared when compared to the spectra of GSC. SEM observations indicated that the optimum experimental condition followed as: mass ratio of GO and S was 1:1, 10% NaOH was used to adjust the pH. EDX analysis showed that the sulfur content reached at 68.8% of the composite material. The resultant electric resistance was nearly less than GO’s resistance in three orders of magnitude under same condition. Further electrochemical performance tests showed a coulombic efficiency was 96% from the first cycle capacity was 827 mAh g−1, to 388 mAh g−1 in the 100 cycles. This study carries substantial significance to the development of Li-S battery cathode materials. Keywords: Lithium-sulfur battery, Graphene, Sulfur spheres, Cathode material |
| first_indexed | 2024-12-13T01:36:25Z |
| format | Article |
| id | doaj.art-2853ad999f5647e7961eddffc887d63e |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-13T01:36:25Z |
| publishDate | 2017-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-2853ad999f5647e7961eddffc887d63e2022-12-22T00:03:53ZengElsevierResults in Physics2211-37972017-01-017250255Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathodeFeiyan Liu0Jiyuan Liang1Chang Zhang2Liang Yu3Jinxing Zhao4Chang Liu5Qian Lan6Shengrui Chen7Yuan-Cheng Cao8Guang Zheng9Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, China; Corresponding author.School of Physics and Information Engineering, Jianghan University, Wuhan 430056, ChinaReduced graphene oxide (rGO) encapsulated sulfur spheres for the Li-S batteries were prepared via the redox reaction between sodium polysulfide. XRD spectra showed that the diffraction peak of graphite oxide (GO) at 10° disappeared, while the relatively weak diffraction peak at 27° belongs to graphene emerged. FT-IR spectra showed that the vibrations of the functional groups of GO, such as 3603 cm−1, 1723 cm−1and 1619 cm−1 which contributed from OH, COC and CO respectively, disappeared when compared to the spectra of GSC. SEM observations indicated that the optimum experimental condition followed as: mass ratio of GO and S was 1:1, 10% NaOH was used to adjust the pH. EDX analysis showed that the sulfur content reached at 68.8% of the composite material. The resultant electric resistance was nearly less than GO’s resistance in three orders of magnitude under same condition. Further electrochemical performance tests showed a coulombic efficiency was 96% from the first cycle capacity was 827 mAh g−1, to 388 mAh g−1 in the 100 cycles. This study carries substantial significance to the development of Li-S battery cathode materials. Keywords: Lithium-sulfur battery, Graphene, Sulfur spheres, Cathode materialhttp://www.sciencedirect.com/science/article/pii/S2211379716305770 |
| spellingShingle | Feiyan Liu Jiyuan Liang Chang Zhang Liang Yu Jinxing Zhao Chang Liu Qian Lan Shengrui Chen Yuan-Cheng Cao Guang Zheng Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode Results in Physics |
| title | Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode |
| title_full | Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode |
| title_fullStr | Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode |
| title_full_unstemmed | Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode |
| title_short | Reduced graphene oxide encapsulated sulfur spheres for the lithium-sulfur battery cathode |
| title_sort | reduced graphene oxide encapsulated sulfur spheres for the lithium sulfur battery cathode |
| url | http://www.sciencedirect.com/science/article/pii/S2211379716305770 |
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