Venezia, E.; Salimi, P.; Chauque, S.; Proietti Zaccaria, R. Sustainable Synthesis of Sulfur−Single Walled Carbon Nanohorns Composite for Long Cycle Life Lithium−Sulfur Battery. Nanomaterials2022, 12, 3933.
Venezia, E.; Salimi, P.; Chauque, S.; Proietti Zaccaria, R. Sustainable Synthesis of Sulfur−Single Walled Carbon Nanohorns Composite for Long Cycle Life Lithium−Sulfur Battery. Nanomaterials 2022, 12, 3933.
Venezia, E.; Salimi, P.; Chauque, S.; Proietti Zaccaria, R. Sustainable Synthesis of Sulfur−Single Walled Carbon Nanohorns Composite for Long Cycle Life Lithium−Sulfur Battery. Nanomaterials2022, 12, 3933.
Venezia, E.; Salimi, P.; Chauque, S.; Proietti Zaccaria, R. Sustainable Synthesis of Sulfur−Single Walled Carbon Nanohorns Composite for Long Cycle Life Lithium−Sulfur Battery. Nanomaterials 2022, 12, 3933.
Abstract
The preparation of sulfur-single walled carbon nanohorns active material via a simple and sustainable evaporation method for application as cathode in lithium-sulfur batteries is reported. We show that the synthesis process enables the infiltration of elemental sulfur within the carbon nanohorns thus obtaining a morphology responsible for the ameliorating of the shuttle effect. The sulfur-carbon composite is characterized in terms of structure, morphology, and composition through x-ray diffraction, transmission electron microscopy, and thermogravimetric analyses. From the electrochemical point of view, cyclic voltammetry, rate capability, and galvanostatic cycling tests are performed employing a solution of bis(trifluoromethane)sulfonimide lithium salt and lithium nitrate in a mixture of 1,2-dimethoxyethane and 1,3-dioxolane in order to evaluate the electrode design applicability within lithium-sulfur cells. In this respect, further insights are provided by the estimation of the lithium-ion diffusion coefficient through the Randles-Sevcik equation, and by electrochemical impedance spectroscopy. The obtained results reveal a remarkable cycle life lasting around 800 cycles with a stable capacity of 520 mA h g-1 for the first 400 cycles at C/4, while reaching a value around 300 mA h g-1 at the 750th cycle. These results suggest sulfur-carbon nanohorns active material as a potential candidate for the next-generation battery technology.
Keywords
lithium-sulfur batteries; single-walled carbon nanohorns; long cycle life; sustainable synthesis process
Subject
Chemistry and Materials Science, Nanotechnology
Copyright:
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