Department of Physics University 04620;
Shaanxi Key Laboratory of Chemical Additives for Industry University of Science and Technology’an 710021;
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing University of Technology 430070;
College of Physics and Electronic Information’an University’an 716000;
Center for Energy Storage Research Energy Institute Institute of Science and Technology(KIST) 02792;
anode materials; core-shell structure; nitrogen-doped carbon; ring-opening reaction; transition-metal sulfide;