Optimizing Hybridization of 1T and 2H Phases in MoS2 Monolayers to Improve Capacitances of Supercapacitors

By Lianfu Jiang, S. Zhang, S. Kulinich, Xiufeng Song, Junwu Zhu, Xin Wang, Haibo Zeng. 2015

169 citations recorded by the source corpus.

We report on a 100-fold capacitance increase in MoS2-based supercapacitors achieved via optimizing the in-plane 1T-2H phase hybridization of the monolayers. Chemically exfoliated MoS2 monolayers were annealed at low temperature to tune their 1T content from 2% to 60%. The obtained hybridization states were confirmed by X-ray photoelectron and Raman spectroscopies. After optimizing the hybridization degree, the electrode based on MoS2 monolayers with 40% of the 1T phase exhibited outstanding performance with a resistance as low as 0.68 kΩ sq−1, specific capacitance of 366.9 F g−1, and retention ratio of 92.2% after 1000 cycles at current densities of 0.5 A g−1. GRAPHICAL ABSTRACT

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a1928542e4249fe619e8e2394ccebcdefd925b7c

Citations in the corpus

• Two-dimensional transition metal dichalcogenides in supercapacitors and secondary batteries (2019, unknown): “MoS2: 40% 1T phase, 95% monolayer [165] 6M KOH; -0.”