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Synthesis of Hierarchically Porous Nitrogen‐Doped Carbon for Sodium‐Ion Batteries
Author(s) -
Liu Yang,
Gao Zhiqiang
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600834
Subject(s) - heteroatom , materials science , carbon fibers , anode , nitrogen , chemical engineering , reagent , porosity , current density , sodium , doping , dopant , inorganic chemistry , electrode , chemistry , organic chemistry , composite material , metallurgy , ring (chemistry) , composite number , physics , optoelectronics , quantum mechanics , engineering
In this work, a facile synthetic strategy is developed for the preparation of nitrogen‐doped (N‐doped) hierarchically porous carbon materials. During the preparation process, sodium citrate and urea serve as carbon and nitrogen sources, respectively, without any template or additional activation reagents. Both the microstructure and nitrogen dopant content of the porous carbon can be tuned. The as‐prepared porous carbon materials are tested as anodes in sodium‐ion batteries. The porous N‐doped carbon prepared at 650 °C shows a high reversible capacity of 305.7 mA h g −1 at a current density of 0.1 A g −1 . Even at a higher current density of 8.0 A g −1 , a specific capacity of 164.5 mA h g −1 is obtained. After 500 cycles, the specific capacity of the electrode remains as high as 219 mA h g −1 at a current density of 1.0 A g −1 . This synthetic strategy provides a simple and efficient approach for preparing heteroatom‐doped porous carbon in energy storage and other fields.