J. Mater. Sci. Technol. ›› 2022, Vol. 123: 34-40.DOI: 10.1016/j.jmst.2022.01.018

• Research Article • Previous Articles     Next Articles

Realization of high-purity 1T-MoS2 by hydrothermal synthesis through synergistic effect of nitric acid and ethanol for supercapacitors

Han Lia,b, Hui Lia,b, Ziqiang Wua,b, Lili Zhua,b, Changdian Lia,b, Shuai Lina, Xuebin Zhua,*(), Yuping Suna,c,d   

  1. aKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
    bUniversity of Science and Technology of China, Hefei 230026, China
    cHigh Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
    dCollaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2021-11-15 Revised:2022-01-13 Accepted:2022-01-23 Published:2022-10-01 Online:2022-09-30
  • Contact: Xuebin Zhu
  • About author:*E-mail address: xbzhu@issp.ac.cn (X. Zhu).

Abstract:

Phase engineering of molybdenum disulfide (MoS2) can achieve phase transformation from the semiconducting phase (2H-MoS2) with poor conductivity to the metallic phase (1T-MoS2) with superior electrochemical properties. Therefore, it is desirable to prepare high concentration 1T-MoS2 by simple and facile methods. In this work, MoS2 with high concentration of 1T phase is successfully prepared by one-pot hydrothermal synthesis through the synergistic effect of HNO3 and CH3CH2OH, which is stable for more than half of a year. The as-synthesized MoS2 shows high capacitance of 392 F g-1 at 1 A g-1 as used for supercapacitors electrodes, and displays excellent capacitance retention (83% after 10,000 cycles). Asymmetric supercapacitors (ASCs) devices assembled by the as-synthesized MoS2 and MnO2 on carbon cloths, exhibit high energy and power densities (0.194 mWh cm-2 and 13.466 mW cm-2). These results shed a light to realize 1T phase MoS2 through the synergistic effect in hydrothermal processing.

Key words: MoS2, Metallic phase, Synergistic effect, Hydrothermal synthesis, Supercapacitor