Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries
Two different interlayers were introduced in lithium–sulfur batteries to improve the cycling stability with sulfur loading as high as 80% of total mass of cathode. Melamine was recommended as a nitrogen-rich (N-rich) amine component to synthesize a modified polyacrylic acid (MPAA). The electrospun M...
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doaj-1e8888365d8849e2850e008ea080a15c2020-11-24T22:41:49ZengMDPI AGMaterials1996-19442017-03-0110437610.3390/ma10040376ma10040376Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur BatteriesTianji Gao0TrungHieu Le1Ying Yang2Zhihao Yu3Zhenghong Huang4Feiyu Kang5Department of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory of Power System, Tsinghua University, Beijing 100084, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing 100084, ChinaLaboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaLaboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaTwo different interlayers were introduced in lithium–sulfur batteries to improve the cycling stability with sulfur loading as high as 80% of total mass of cathode. Melamine was recommended as a nitrogen-rich (N-rich) amine component to synthesize a modified polyacrylic acid (MPAA). The electrospun MPAA was carbonized into N-rich carbon nanofibers, which were used as cathode interlayers, while carbon nanofibers from PAA without melamine was used as an anode interlayer. At the rate of 0.1 C, the initial discharge capacity with two interlayers was 983 mAh g−1, and faded down to 651 mAh g−1 after 100 cycles with the coulombic efficiency of 95.4%. At the rate of 1 C, the discharge capacity was kept to 380 mAh g−1 after 600 cycles with a coulombic efficiency of 98.8%. It apparently demonstrated that the cathode interlayer is extremely effective at shutting down the migration of polysulfide ions. The anode interlayer induced the lithium ions to form uniform lithium metal deposits confined on the fiber surface and in the bulk to strengthen the cycling stability of the lithium metal anode.http://www.mdpi.com/1996-1944/10/4/376lithium–sulfur batterycarbon nanofibers interlayersuppress lithium dendritehigh sulfur loading |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tianji Gao TrungHieu Le Ying Yang Zhihao Yu Zhenghong Huang Feiyu Kang |
spellingShingle |
Tianji Gao TrungHieu Le Ying Yang Zhihao Yu Zhenghong Huang Feiyu Kang Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries Materials lithium–sulfur battery carbon nanofibers interlayer suppress lithium dendrite high sulfur loading |
author_facet |
Tianji Gao TrungHieu Le Ying Yang Zhihao Yu Zhenghong Huang Feiyu Kang |
author_sort |
Tianji Gao |
title |
Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries |
title_short |
Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries |
title_full |
Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries |
title_fullStr |
Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries |
title_full_unstemmed |
Effects of Electrospun Carbon Nanofibers’ Interlayers on High-Performance Lithium–Sulfur Batteries |
title_sort |
effects of electrospun carbon nanofibers’ interlayers on high-performance lithium–sulfur batteries |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2017-03-01 |
description |
Two different interlayers were introduced in lithium–sulfur batteries to improve the cycling stability with sulfur loading as high as 80% of total mass of cathode. Melamine was recommended as a nitrogen-rich (N-rich) amine component to synthesize a modified polyacrylic acid (MPAA). The electrospun MPAA was carbonized into N-rich carbon nanofibers, which were used as cathode interlayers, while carbon nanofibers from PAA without melamine was used as an anode interlayer. At the rate of 0.1 C, the initial discharge capacity with two interlayers was 983 mAh g−1, and faded down to 651 mAh g−1 after 100 cycles with the coulombic efficiency of 95.4%. At the rate of 1 C, the discharge capacity was kept to 380 mAh g−1 after 600 cycles with a coulombic efficiency of 98.8%. It apparently demonstrated that the cathode interlayer is extremely effective at shutting down the migration of polysulfide ions. The anode interlayer induced the lithium ions to form uniform lithium metal deposits confined on the fiber surface and in the bulk to strengthen the cycling stability of the lithium metal anode. |
topic |
lithium–sulfur battery carbon nanofibers interlayer suppress lithium dendrite high sulfur loading |
url |
http://www.mdpi.com/1996-1944/10/4/376 |
work_keys_str_mv |
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