氮掺杂石墨烯包覆二硫化钼纳米球复合材料作为锂离子电池的高性能阳极

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

作者信息

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

机构信息

College of Chemistry & Chemical Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, People's Republic of China.

Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an, Shaanxi 710021, People's Republic of China.

出版信息

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

DOI:10.1088/1361-6528/ac5a84

PMID:35240588

Abstract

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

摘要

由于其高容量（670 mAh g）和独特的二维结构，二硫化钼（MoS₂）在锂离子电池（LIBs）中被广泛使用。然而，由于其体积膨胀和低导电性，二硫化钼作为阳极材料的进一步应用受到限制。在这项工作中，制备了氮掺杂石墨烯包裹的二硫化钼纳米球复合材料（MoS₂@NG），其独特的含有丰富中孔和缺陷的三明治结构可以有效地增强反应动力学。MoS₂@NG电极在0.1 A g下经过100次循环后显示出975.9 mAh g的可逆容量，在5 A g下经过300次循环后仍保持325.2 mAh g的可逆容量。此外，MoS₂@NG电极由于电容行为主导的电化学性能而表现出优异的倍率性能。这表明MoS₂@NG复合材料可作为锂离子电池潜在的阳极材料。