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Carbon Foam Fibers with a Concentric Tube‐Core/Three‐Dimensional Nanosheet‐Sheath Structure for High‐Performance Lithium‐Sulfur Batteries
Author(s) -
Li Gang,
Xu Shiwei,
Li Bin,
Xia Tong,
Yu Jian,
Shao Feng,
Li Hong,
Yang Zhi,
Su Yanjie,
Zhang Yafei,
Ma Jie,
Hu Nantao
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001555
Subject(s) - nanosheet , materials science , sulfur , lithium (medication) , carbon fibers , carbon nanofoam , nanomaterials , lithium–sulfur battery , cathode , nanotechnology , tube (container) , conductivity , supercapacitor , chemical engineering , porosity , capacitance , composite material , electrode , electrochemistry , composite number , chemistry , medicine , endocrinology , metallurgy , engineering
Owing to their superior electrical conductivity and large specific surface areas, carbon nanomaterials are widely applied as hosts for lithium‐sulfur (Li−S) batteries. However, it is challenging to design and prepare hierarchical porous carbon nanomaterials with unique structures that have excellent performances for Li−S batteries. Herein, hierarchical carbon foam fibers (HPCFs) with a concentric tube‐core/three‐dimensional nanosheet‐sheath structure have been rationally designed and fabricated through solution‐combustion and etching methods, and are suitable for Li−S batteries. The as‐prepared HPCFs, with a sulfur loading of 72 wt.%, possess a high initial discharge capacity of 1097.3 mAh g −1 and 68.7 % retention after 500 cycles at 0.2 C. The as‐designed structure can efficiently improve conductivity, suppress the dissolution of polysulfides, and provide quick electron‐/ion‐transfer channels, which are beneficial for designing advanced sulfur cathodes for high‐performance Li−S batteries.