First-principles study of a 2-dimensional C-silicyne monolayer as a promising anode in Na/K ion secondary batteries

Literature Information

Publication Date 2021-04-22
DOI 10.1039/D1CP01538A
Impact Factor 3.676
Authors

Neha Yadav, T. J. Dhilip Kumar


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Abstract

With the depleting resources of energy and increasing demand, the need for sustainable and renewable energy resources has become the need of the hour. The low storage capacity of current materials for Na/K ion batteries has led to the quest to identify suitable materials for an electrode with excellent electrochemical properties. In the present work, a systematic theoretical investigation of C-silicyne, a planar 2-dimensional hexagonal lattice, is performed to establish the geometric and thermal properties and stability. The electronic properties illustrate the metallic nature of C-silicyne, which is conserved even after the effective adsorption of Na/K ions on the surface of the monolayer. For the practical functionality, the storage capacity of C-silicyne is evaluated as 591 mA h gāˆ’1 for Na ions and 443 mA h gāˆ’1 for K ions. Moreover, the low diffusion barriers for the Na (0.57 eV) and K (0.34 eV) ions display their feasible movement across the monolayer as the electrochemical cycle progresses. The average working voltage is found to lie in the range of 0.1–1 V, which is required for the effective functioning of the anode in a Na/K ion battery. These results demonstrate the potential of C-silicyne as a material for the anode in Na/K ion batteries.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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