Wangjia Tang1, Dong Xie1,2, Tong Shen1, Xiuli Wang1, Donghuang Wang1, Xuqing Zhang1, Xinhui Xia1, Jianbo Wu3, Jiangping Tu1. 1. State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China. 2. Guangdong Engineering and Technology Research Center for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China. 3. College of Physics & Electronic Engineering, Taizhou University, Taizhou, 318000, P. R. China.
Abstract
Exploring advanced anode materials with highly reversible capacity have gained great interests for large-scale lithium storage. A facile two-step method is developed to synthesize nitrogen-doped carbon coated MoSe2 microspheres via hydrothermal plus thermal polymerization. The MoSe2 microspheres composed of interconnected nanoflakes are homogeneously coated by a thin nitrogen-doped carbon (N-C) layer. As an anode for lithium ion batteries, the MoSe2 /N-C composite shows better reversibility, smaller polarization, and higher electrochemical reactivity as compared to the unmodified MoSe2 microspheres. The MoSe2 /N-C electrode delivers a high specific capacity of 698 mAh g-1 after 100 cycles at a current density of 100 mA g-1 and good high rate performance (471 mAh g-1 at a high current density of 2000 mA g-1 ). The improved electrochemical performance is attributed to the conductive N-C coating and hierarchical microsphere structure with fast ion/electron transfer characteristics.
Exploring advanced anode materials with highly reversible capacity have gained great interests for large-scale lithium storage. A facile two-step method is developed to synthesize n class="Chemical">nitrogen-doped carbon coated MoSe2 microspheres via hydrothermal plus thermal polymerization. The MoSe2 microspheres composed of interconnected nanoflakes are homogeneously coated by a thin nitrogen-doped carbon (N-C) layer. As an anode for lithium ion batteries, the MoSe2 /N-C composite shows better reversibility, smaller polarization, and higher electrochemical reactivity as compared to the unmodified MoSe2 microspheres. The MoSe2 /N-C electrode delivers a high specific capacity of 698 mAh g-1 after 100 cycles at a current density of 100 mA g-1 and good high rate performance (471 mAh g-1 at a high current density of 2000 mA g-1 ). The improved electrochemical performance is attributed to the conductive N-C coating and hierarchical microsphere structure with fast ion/electron transfer characteristics.