Premium
Catalytic Synthesis of Hard/Soft Carbon Hybrids with Heteroatom Doping for Enhanced Sodium Storage
Author(s) -
Liu Xu,
Zhu Youyu,
Liu Na,
Chen Mingming,
Wang Chengyang,
Wang Xiaolei
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900501
Subject(s) - heteroatom , electrochemistry , oxidizing agent , catalysis , carbon fibers , doping , materials science , sodium , chemical engineering , inorganic chemistry , adsorption , ion , electrode , chemistry , organic chemistry , ring (chemistry) , composite material , metallurgy , optoelectronics , composite number , engineering
Hard carbon shows a promising application for sodium storage but suffers from low electrochemical stability, which leads to poor rate capacity and cycle life. Here, we report a heteroatom‐doping hard/soft carbon hybrid prepared by easy oxidizing acid treatment and low temperature catalytic graphitization. The heteroatoms increase the sodium‐ion adsorption capability during slope region, showing an important contribution at high current. Besides, the introduction of oriented domains enhances the conductivity, as well as the heteroatom doping, and electrochemical stability of hard/soft carbon hybrids. What's more, these structure characteristics also benefit the stable storage of sodium ions, supported by a 74% increase in terms of reversible capacity. Thus, the electrochemical performance retains a fast and reversible capacity of 125 mAh⋅g −1 at high current density of 8 C.