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Coralline‐Like N‐Doped Hierarchically Porous Carbon Derived from Enteromorpha as a Host Matrix for Lithium‐Sulfur Battery
Author(s) -
Ji Shengnan,
Imtiaz Sumair,
Sun Dan,
Xin Ying,
Li Qian,
Huang Taizhong,
Zhang Zhaoliang,
Huang Yunhui
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703357
Subject(s) - carbonization , materials science , carbon fibers , chemical engineering , hydrothermal carbonization , faraday efficiency , electrolyte , battery (electricity) , lithium (medication) , supercapacitor , cathode , porosity , sulfur , doping , nanotechnology , composite number , composite material , electrochemistry , chemistry , electrode , scanning electron microscope , medicine , power (physics) , physics , optoelectronics , quantum mechanics , engineering , metallurgy , endocrinology
Coralline‐like N‐doped hierarchically porous carbon (CNHPC) was prepared through a hydrothermal carbonization process using a sea pollutant enteromorpha as the starting material. The addition of a small amount of glucose during carbonization improved the yield of carbon, and the inherent N contents, especially for pyrrolic N and pyridinic N atoms. After loading 40 wt. % sulfur, the CNHPC/S composite, as a cathode in a Li‐S battery, exhibited an initial discharge capacity of 1617 mAh g −1 (96.5 % of theoretical capacity) at 0.1 C and a capacity loss of 0.05 % per charge‐discharge cycle after 500 cycles at 0.5 C with a stable Coulombic efficiency of 100 % in carbonate based electrolyte. Such a great performance can be attributed to the coralline‐like hierarchically porous infrastructure and inherently abundant N doping. Given the conversion of waste pollutants into valuable energy‐storage materials and the easy process, this work features a promising approach to prepare C/S cathodes for Li‐S batteries. The special structural and textural characteristics of CNHPC might be attractive to other practical applications such as supercapacitors and catalysis.