Volume 7, Issue 6 1900079
Full Paper

Hollow NaTi1.9Sn0.1(PO4)3@C Nanoparticles for Anodes of Sodium-Ion Batteries with Superior Rate and Cycling Properties

Min Wang

Min Wang

School of Chemistry & Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Man Xie

Corresponding Author

Man Xie

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Zhiming Zhou

Zhiming Zhou

School of Chemistry & Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Yongxin Huang

Yongxin Huang

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Ziheng Wang

Ziheng Wang

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Yang Mei

Yang Mei

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Feng Wu

Feng Wu

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081 China

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Renjie Chen

Corresponding Author

Renjie Chen

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081 China

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First published: 23 February 2019
Citations: 5

Abstract

Herein, two strategies are simultaneously used to synthesize the hollow carbon-coated nanoparticles of NaTi1.9Sn0.1(PO4)3@C (NTSP@C). The porous morphology of NTST@C is controlled through a trace amount of tin doping while selecting a fire-new carbon source. The NTSP@C materials present a nanosized structure with a hollow morphology, exhibiting a large specific surface area of ≈71.0 m2 g−1 and a average bore diameter of ≈26.4 nm. Moreover, the carbon layer is ≈5 nm thick with a mass ratio of 6.81%. The NTSP@C sample displays an ultrastrong rate capability (128.8 mA h g−1 at 0.1 C and 101.5 mA h g−1 at 10 C at 1.5–3.0 V) and a superior cycling performance (126.3–115.8 mA h g−1 after 300 cycles at 1 C for a retention ratio of 91.7% and 101.4–87.1 mA h g−1 after 2000 cycles at 10 C for a retention ratio of 85.9%). These excellent electrochemical performances are due to the nanosized structure, unique morphology, and thin carbon layer as a conductive medium. It is clear that the NTSP@C material is a promising anode material that can be incorporated into sodium-ion batteries to achieve superior electrochemical performance.

Conflict of Interest

The authors declare no conflict of interest.

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