Preparation and electrochemical properties of Li2MoO3/C composites for rechargeable Li-ion batteries

Literature Information

Publication Date 2016-09-26
DOI 10.1039/C6CP05162F
Impact Factor 3.676
Authors

Yotaro Shirao, Kei Kubota, Shinichi Komaba


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Abstract

Layered Li2MoO3 is a potential candidate for a high-capacity positive electrode material for Li-ion batteries because of its excess lithium composition. However, the difficulty of single-phase preparation and its insulating nature are drawbacks for its application in lithium-ion batteries. A small quantity of acetylene black added in the starting material solves these drawbacks, i.e. the formation of impurity phases and the low conductivity. As a result, a Li2MoO3/C composite is successfully synthesized with the simple addition of acetylene black. Since the electronic conductivity of the composite is enhanced to more than 1000 times higher than that of bare Li2MoO3, the Li2MoO3/C composite delivers approximately 230 mA h gāˆ’1 of initial discharge capacity in a voltage range of 1.5–4.3 V, while carbon-free Li2MoO3 shows only 110 mA h gāˆ’1 of initial discharge capacity. During the initial lithium extraction and insertion, a partial transformation from a layered into a cation-disordered cubic structure is evidenced in the Li2MoO3/C composite electrode by X-ray diffraction.

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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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