期刊
CHEMICAL ENGINEERING JOURNAL
卷 433, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133778
关键词
Reaction kinetics; Theoretical calculation; Sodium ion battery; 1T-MoS2; N, P co-doping
资金
- National Natural Science Foundation of China [52072328, 51772257]
In this study, N, P co-doped carbon network modified 1T/2H-MoS2 heterostructures were fabricated and showed excellent cycling performance and rate capability. The results suggest the prospects of using 1T/2H-MoS2@PNC as high-performance anode materials for large-scale energy storage.
MoS2 has attracted great attentions due to the high capacity and layered crystal structure. Whereas the intrinsic poor conductivity and big volume change of common used 2H-MoS2 bring about poor rate capability and bad cycling performance. Herein, three-dimensional N, P co-doped carbon network modified mixed phases of 1T/2H-MoS2 heterostructures (1T/2H-MoS2@PNC) have been rationally fabricated through a facile three-step strategy. Dependent on the cooperate effect of 1T/2H-MoS2 heterostructure and N, P co-doped carbon network, the 1T/2H-MoS2@PNC exhibits a high reversible capacity (475 mAh g(-1) at 0.5 A g(-1)), outstanding rate capability (347 mAh g(-1) at 10 A g(-1)) and long-term cyclic life up to 1000 cycles without capacity loss, obviously superior to 1T/2H-MoS2@PNC with different carbon contents/synthesis temperatures, 2H-MoS2@PNC and 1T/2H-MoS2@NC. Reaction kinetics and theoretical calculation have been investigated to verify the synergetic advantages of 1T/ 2H-MoS2 and N, P co-doping of carbon networks. Moreover, various ex-situ techniques have been employed to disclose the reaction mechanism of 1T/2H-MoS2@PNC. The assembled Na3V2(PO4)(3)//1T/2H-MoS2@PNC full batteries also demonstrate good electrochemical properties (a discharge capacity of 216 mAh g(-1) over 300 cycles at 0.5 A g(-1)). All the results manifest the prospective application of 1T/2H-MoS2@PNC as high-performance anode materials for large-scale energy storage.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据