Framework structured Na4Mn4Ti5O18 as an electrode for Na-ion storage hybrid devices

Literature Information

Publication Date 2015-07-07
DOI 10.1039/C5CP02866C
Impact Factor 3.676
Authors

M. Jayakumar


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Abstract

In this study, framework structured Na4Mn4Ti5O18 possessing S-shaped tunnels for sodium intercalation is reported as an electrode for hybrid sodium ion batteries. Galvanostatic cycling of Na4Mn4Ti5O18vs. Na in the voltage region from 1.5 V to 3.95 V exhibits a capacity of 102 mA h g−1 at 0.1C rate corresponding to a specific capacitance of 149 F g−1 with a capacity retention of 90% over 50 cycles. The electrochemical analysis using CV measurements revealed the charge storage involving intercalation and pseudocapacitance. For instance, total charge storage of 345 C g−1 is observed at 0.01 mV s−1, which is attributed to 63% intercalation and 37% capacitance. Na4Mn4Ti5O18 was also studied for sodium ion storage in an aqueous medium. It delivered a capacity of 36 mA h g−1 (144 F g−1) in the voltage window of 0–0.8 V.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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