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Open Access Rational design of binder-free Sn film anode for lithium ion batteries

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Substantial efforts have been made to improve the electrochemical properties of tin-based materials as substitute for traditional graphite anode materials. However, the large volume expansion of metallic tin hampers its development. In this paper, we design a binder-free anode configuration with Sn-carbon based materials ([email protected]/Sn). As-grown carbon spheres, sandwiched between Sn film and Cu grid, were utilized as a buffer layer to cushion the volume expansion occurred in the Sn film during charging and discharging processes. The [email protected]/Sn exhibits excellent capacity retention after 150 cycles with a nearly 100% columbic efficiency. It delivers a specific capacity of 432.6 mAh/g at the 100 mA/g, several times higher than that in the [email protected] anode. Our results reveal that the buffer layer of carbon spheres plays an important role to enhance the electrochemical performance of [email protected]/Sn.

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Keywords: ANODE; CARBON SPHERE; LITHIUM-ION BATTERY; SN FILM

Document Type: Research Article

Publication date: December 1, 2016

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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