title: Nitrogen-Doped Hollow Amorphous Carbon Spheres@Graphitic Shells Derived from Pitch: New Structure Leads to Robust Lithium Storage.
abstract: 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 616 mAh g(-1) after 250 cycles at a current rate of 500 mA g(-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 503 mAh g(-1) at a high current density of 1.5 A g(-1) . The superior electrochemical performance of NHCS-O can be attributed to the hybrid structure, high N and O contents, and rich surface defects.
authors.affiliation: Key Laboratory of Material and Technology for Clean Energy, Ministry of Education, Key Laboratory of Advanced Functional Materials, Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang Autonomous Region, P. R. China.
authors.forename: Qingtao
authors.initials: Q
authors.lastname: Ma
authors.affiliation: Key Laboratory of Material and Technology for Clean Energy, Ministry of Education, Key Laboratory of Advanced Functional Materials, Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang Autonomous Region, P. R. China. wangluxiang@xju.edu.cn.
authors.forename: Luxiang
authors.initials: L
authors.lastname: Wang
authors.affiliation: Laboratory of Industrial Chemistry, Ruhr University Bochum, 44780, Bochum, Germany. wei.xia@rub.de.
authors.forename: Wei
authors.initials: W
authors.lastname: Xia
authors.affiliation: Key Laboratory of Material and Technology for Clean Energy, Ministry of Education, Key Laboratory of Advanced Functional Materials, Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang Autonomous Region, P. R. China.
authors.forename: Dianzeng
authors.initials: D
authors.lastname: Jia
authors.affiliation: Carbon Research Laboratory, Dalian University of Technology, Dalian, 116024, P.R. China.
authors.forename: Zongbin
authors.initials: Z
authors.lastname: Zhao
keywords: carbon; chemical vapor deposition; doping; electrochemistry; lithium-ion batteries