N-doped graphene encapsulated MoS2nanosphere composite as a high-performance anode for lithium-ion batteries

Yating Zhang; Zhanrui Zhang; Youyu Zhu; Yongling Zhang; Mengnan Yang; Siyi Li; Ke Suo; Keke Li

doi:10.1088/1361-6528/ac5a84

N-doped graphene encapsulated MoS₂nanosphere composite as a high-performance anode for lithium-ion batteries

Nanotechnology. 2022 Mar 17;33(23). doi: 10.1088/1361-6528/ac5a84.

Authors

Yating Zhang^{1

2}, Zhanrui Zhang¹, Youyu Zhu¹, Yongling Zhang¹, Mengnan Yang¹, Siyi Li¹, Ke Suo¹, Keke Li¹

Affiliations

¹ College of Chemistry & Chemical Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, People's Republic of China.
² Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an, Shaanxi 710021, People's Republic of China.

PMID: 35240588
DOI: 10.1088/1361-6528/ac5a84

Abstract

MoS₂is widely used in lithium-ion batteries (LIBs) due to its high capacity (670 mAh g^-1) and unique two-dimensional structure. However, the further application was limited of MoS₂as anode materials suffer from its volume expansion and low conductivity. In this work, N-doped graphene encapsulated MoS₂nanosphere composite (MoS₂@NG) were prepared and its unique sandwich structure containing abundant mesopores and defects can efficiently enhance reaction kinetics. The MoS₂@NG electrode shows a reversible capacity of 975.9 mAh g^-1at 0.1 A g^-1after 100 cycles, and a reversible capacity of 325.2 mAh g^-1is still maintained after 300 cycles at 5 A g^-1. In addition, the MoS₂@NG electrode exhibites an excellent rate performance benefiting from the electrochemical properties dominated by capacitive behavior. This suggests that MoS₂@NG composite can be used as potential anode materials for LIBs.

Keywords: LIBs; MoS2; N-doped; anode; graphene.