期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 7, 页码 2339-2344出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503462
关键词
doping; carbon; chemical vapor deposition; electrochemistry; lithium-ion batteries
资金
- Xinjiang Autonomous Region Major Projects [201130113-1]
- National Science Foundation of China [U1203292]
- Western Light Talent Culture Project of Chinese Academy of Sciences [YBXM-2014-07]
- Technological Innovation Youth Training Project of Xinjiang Autonomous [2013731006]
- Science and Technology Assistance of Xinjiang Province [201491126]
Nitrogen-doped mesoporous hollow carbon spheres (NHCS) consisting of hybridized amorphous and graphitic carbon were synthesized by chemical vapor deposition with pitch as raw material. Treatment with HNO3 vapor was performed to incorporate oxygen-containing groups on NHCS, and the resulting NHCS-O showed excellent rate capacity, high reversible capacity, and excellent cycling stability when tested as the anode material in lithium-ion batteries. The NHCS-O electrode maintained a reversible specific capacity of 616mAhg(-1) after 250 cycles at a current rate of 500mAg(-1), which is an increase of 113% compared to the pristine hollow carbon spheres. In addition, the NHCS-O electrode exhibited a reversible capacity of 503mAhg(-1) at a high current density of 1.5Ag(-1). The superior electrochemical performance of NHCS-O can be attributed to the hybrid structure, high N and O contents, and rich surface defects.
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