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- Title
Rapid Thermal Sulfurization of Tantalum Film with Enhanced Specific Capacitance.
- Authors
HUAZHONG LIU; WENXUAN HE; XIAOLAN WANG; ZHIGAO LAN; HUOXI XU
- Abstract
In this paper, the effect of rapid thermal sulfurization on the electrochemical storage properties of ultrathin metallic tantalum (Ta) is reported. It was achieved by introducing sulfur (S) onto the surface and subsurface region of the Ta film, which resulted in areal capacitance enhancement as compared to that of the pristine Ta film. Notably, the sulfurized Ta-based electrode delivers an areal capacitance reaching 3.4 mF/cm² at scan rate of 5 mV/s (equivalent to volumetric capacitance of 261.5 F/cm³), in 1 M Na2SO4 electrolyte solution, with a cycling stability of 76% over 10,000 consecutive cycles). Surface chemistry and morphology of the electrodes before and after sulfurization were investigated and correlated with the electrochemical properties of different electrodes. The present results anticipate tantalum sulfide (TaS) to be a promising material for electrochemical capacitors.
- Subjects
TANTALUM films; ELECTRIC capacity; SURFACE chemistry; SUPERCAPACITORS; TANTALUM; ELECTROLYTE solutions; SUPERCAPACITOR electrodes; METALLIC films; SURFACE morphology
- Publication
Acta Physica Polonica: A, 2021, Vol 139, Issue 6, p642
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.139.642