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Hollow NaTi 1.9 Sn 0.1 (PO 4 ) 3 @C Nanoparticles for Anodes of Sodium‐Ion Batteries with Superior Rate and Cycling Properties
Author(s) -
Wang Min,
Xie Man,
Zhou Zhiming,
Huang Yongxin,
Wang Ziheng,
Mei Yang,
Wu Feng,
Chen Renjie
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900079
Subject(s) - anode , materials science , electrochemistry , nanoparticle , morphology (biology) , carbon fibers , tin , ion , chemical engineering , sodium , layer (electronics) , doping , nanotechnology , analytical chemistry (journal) , electrode , chemistry , composite material , chromatography , metallurgy , optoelectronics , composite number , organic chemistry , biology , engineering , genetics
Herein, two strategies are simultaneously used to synthesize the hollow carbon‐coated nanoparticles of NaTi 1.9 Sn 0.1 (PO 4 ) 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 m 2 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.