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Oriented outperforms disorder: Thickness-independent mass transport for lithium-sulfur batteries
Fan, Xia-Lu; Ping, Lin-Quan; Qi, Fu-Lai; Ghazi, Zahid Ali; Tang, Xiao-Nan; Fang, Ruo-Pian; Sun, Zhen-Hua; Cheng, Hui-Ming; Liu, Chang; Li, Feng
2019-12-01
Source PublicationCARBON
ISSN0008-6223
Volume154Pages:90-97
AbstractExtreme fast charging in a thick electrode film is critical for high rate lithium sulfur batteries. However, the high ion-path tortuosity of most carbon/sulfur cathodes dramatically hinder their mass transport, thus leading to poor rate performance. This situation goes worse with increasing the electrode thickness. Here, we report a binder-free vertically-aligned carbon nanotube/sulfur (VACNT/S) cathode with an excellent thickness-independent mass transport and high-rate performance. Compared with a conventional disordered carbon nanotube/sulfur electrode, the highly conductive VACNTs provide directional paths for the ultrafast transfer of both lithium ions and electrons, leading to improved kinetics and a stable redox activity. The VACNT/S electrode shows an extremely high initial specific capacity of 894 mA h g(-1)at a 5 C rate, and very stable charge/discharge performance with a capacity of 486.1 mA h g(-1) after 400 cycles and a low capacity decay rate of 0.1% per cycle. This work demonstrates an efficient pathway for the design of electrodes for high-rate lithium sulfur batteries. (C) 2019 Elsevier Ltd. All rights reserved.
Indexed BySCI
Language英语
WOS IDWOS:000488203600012
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80603
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Fan, Xia-Lu,Ping, Lin-Quan,Qi, Fu-Lai,et al. Oriented outperforms disorder: Thickness-independent mass transport for lithium-sulfur batteries[J]. CARBON,2019,154:90-97.
APA Fan, Xia-Lu.,Ping, Lin-Quan.,Qi, Fu-Lai.,Ghazi, Zahid Ali.,Tang, Xiao-Nan.,...&Li, Feng.(2019).Oriented outperforms disorder: Thickness-independent mass transport for lithium-sulfur batteries.CARBON,154,90-97.
MLA Fan, Xia-Lu,et al."Oriented outperforms disorder: Thickness-independent mass transport for lithium-sulfur batteries".CARBON 154(2019):90-97.
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