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Cable‐Shaped Lithium–Sulfur Batteries Based on Nitrogen‐Doped Carbon/Carbon Nanotube Composite Yarns
Author(s) -
Yuan Hongxin,
Zhang Miao,
Yang Chen,
Liu Lixuan,
Lu Ruichao,
Mao Lijuan,
Wei Zhixiang
Publication year - 2019
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201900201
Subject(s) - materials science , carbon nanotube , anode , composite material , carbonization , carbon fibers , lithium (medication) , cathode , composite number , nanotube , energy storage , nanotechnology , electrode , electrical engineering , chemistry , scanning electron microscope , medicine , power (physics) , physics , engineering , quantum mechanics , endocrinology
The research on flexible and wearable devices has attracted extensive attention in the last few years. Lithium–sulfur (Li‐S) batteries are regarded as a promising option because of their high theoretical capacity and energy density. Here, cable‐shaped Li‐S batteries are developed based on a nitrogen‐doped carbon/carbon nanotube/sulfur (NCNT/S) composite cathode and lithium metal anode. The carbon nanotube (CNT) yarns with high conductivity and an appropriate amount of doped nitrogen are synthesized by wet‐spinning followed by a carbonization process, and further act as a self‐supported conductive backbone for the active material. The NCNT/S yarns exhibit a high initial capacitance of 1001 mAh g −1 and excellent cyclic stability with 87% capacity retention after 200 cycles at 0.5 C. Furthermore, the assembled cable‐shaped Li‐S batteries by NCNT/S yarns present good ability to light up the LEDs for more than 8 h under normal and bending states at various angles, indicating that the cable‐shaped Li‐S batteries could be a prospective candidate for application in wearable electronics.