Premium
3D Hierarchically Interconnected Porous Graphene Containing Sulfur for Stable High Rate Li–S Batteries
Author(s) -
Qian Weiwei,
Gao Qiuming,
Yang Kai,
Tian Weiqian,
Tan Yanli,
Yang Chunxiao,
Zhang Hang,
Li Zeyu,
Zhu Lihua
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500430
Subject(s) - graphene , faraday efficiency , sulfur , materials science , annealing (glass) , oxide , porosity , cathode , chemical engineering , specific surface area , nanotechnology , composite material , electrochemistry , chemistry , electrode , metallurgy , catalysis , organic chemistry , engineering
A simple strategy for the reduction of graphene oxide by annealing was used to produce 3D hierarchically interconnected porous graphene (HIPG) samples. The optimized HIPG‐900 sample possessing a specific surface area of 367.4 m 2 g −1 and pore volume of 1.3 cm 3 g −1 contains a large amount of sulfur (65.8 wt %) and improves the utilization of sulfur when used as the cathode of Li–S batteries. A high initial specific discharge capacity of 914.1 mAh g −1 and a specific capacity of 486.0 mAh g −1 after 500 cycles was obtained for HIPG‐900/S composites at 1C. A high specific capacity of 467.2 and 162.4 mAh g −1 was obtained at a high rate of 10C with a Coulombic efficiency of over 90.0 % at the 1st and 500th cycle, respectively.