ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries
Fabrication of a nanocrystalline zinc oxide (ZnO)/nitrogen-doped graphene (NDG) composite using a novel and facile in situ sol-gel technique is demonstrated in this study. A two-dimensional nanostructured morphology with uniform ZnO nanoparticles (average diameter of 10 ± 4 nm) anchored o...
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doaj-3aa31d6aff30404db7f70f21523609002020-11-24T21:46:47ZengMDPI AGMetals2075-47012018-09-0181075510.3390/met8100755met8100755ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur BatteriesSuyu Wang0Fan Gao1Ruina Ma2An Du3Taizhe Tan4Miao Du5Xue Zhao6Yongzhe Fan7Ming Wen8School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSynergy Innovation Institute of GDUT, Heyuan 517000, ChinaSchool of Chemistry and Chemical Engineering, Qilu Normal University, Jinan 250200, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaFabrication of a nanocrystalline zinc oxide (ZnO)/nitrogen-doped graphene (NDG) composite using a novel and facile in situ sol-gel technique is demonstrated in this study. A two-dimensional nanostructured morphology with uniform ZnO nanoparticles (average diameter of 10 ± 4 nm) anchored on NDG nanosheets was observed via electron microscopy. The polar heteroatoms on the graphene sheets provided abundant sites for polysulfide absorption. More importantly, the strong chemical interaction between ZnO and polysulfides efficiently hindered the transport of polysulfides. Consequently, the lithium/sulfur (Li/S) battery with the ZnO/NDG composite-coated separator exhibited enhanced performance in terms of discharge capacity and cycling stability compared to the cell with a conventional separator. With the modified separator, the Li/S battery achieved a discharge capacity of 942 mAh·g−1 after the first cycle and exhibited a capacity retention of 90.02% after the 200th charge/discharge test at 0.1 C. These results indicate that suppression of the shuttling of polysulfides efficiently improves the performance of the Li/S battery.http://www.mdpi.com/2075-4701/8/10/755ZnO/N-doped graphene compositemodified separatorlithium/sulfur batterysol-gelpolysulfide |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Suyu Wang Fan Gao Ruina Ma An Du Taizhe Tan Miao Du Xue Zhao Yongzhe Fan Ming Wen |
spellingShingle |
Suyu Wang Fan Gao Ruina Ma An Du Taizhe Tan Miao Du Xue Zhao Yongzhe Fan Ming Wen ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries Metals ZnO/N-doped graphene composite modified separator lithium/sulfur battery sol-gel polysulfide |
author_facet |
Suyu Wang Fan Gao Ruina Ma An Du Taizhe Tan Miao Du Xue Zhao Yongzhe Fan Ming Wen |
author_sort |
Suyu Wang |
title |
ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries |
title_short |
ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries |
title_full |
ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries |
title_fullStr |
ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries |
title_full_unstemmed |
ZnO Nanoparticles Anchored on a N-Doped Graphene-Coated Separator for High Performance Lithium/Sulfur Batteries |
title_sort |
zno nanoparticles anchored on a n-doped graphene-coated separator for high performance lithium/sulfur batteries |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2018-09-01 |
description |
Fabrication of a nanocrystalline zinc oxide (ZnO)/nitrogen-doped graphene (NDG) composite using a novel and facile in situ sol-gel technique is demonstrated in this study. A two-dimensional nanostructured morphology with uniform ZnO nanoparticles (average diameter of 10 ± 4 nm) anchored on NDG nanosheets was observed via electron microscopy. The polar heteroatoms on the graphene sheets provided abundant sites for polysulfide absorption. More importantly, the strong chemical interaction between ZnO and polysulfides efficiently hindered the transport of polysulfides. Consequently, the lithium/sulfur (Li/S) battery with the ZnO/NDG composite-coated separator exhibited enhanced performance in terms of discharge capacity and cycling stability compared to the cell with a conventional separator. With the modified separator, the Li/S battery achieved a discharge capacity of 942 mAh·g−1 after the first cycle and exhibited a capacity retention of 90.02% after the 200th charge/discharge test at 0.1 C. These results indicate that suppression of the shuttling of polysulfides efficiently improves the performance of the Li/S battery. |
topic |
ZnO/N-doped graphene composite modified separator lithium/sulfur battery sol-gel polysulfide |
url |
http://www.mdpi.com/2075-4701/8/10/755 |
work_keys_str_mv |
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