Journal
JOURNAL OF POWER SOURCES
Volume 364, Issue -, Pages 420-425Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.08.060
Keywords
Sodium ion battery; Anode; Tin phosphide; Titanium carbide; Tin agglomeration
Funding
- RGC/GRF [14316716]
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Experimental results from electrochemical characterizations and ex-situ X-ray diffraction (XRD) of the Sn4P3 anode upon cycling reveal that Sn agglomeration from the Sn4P3 particles plays a major role in the fast capacity fading of the Sn4P3 anode for sodium-ion batteries. TiC is demonstrated to be an effective additive to enhance the cycle stability of Sn4P3 by suppressing Sn agglomeration during cycling. Sn4P3/30-wt%TiC composite delivers a stable capacity of 300 mAh g(-1) or 700 Ah L-1 over 100 cycles at current density of 100 mA g(-1). The high density TiC (4.93 g cm(-3)), as compared to conventional carbon based additives, makes it attractive for achieving higher volumetric capacity of the anode. (C) 2017 Elsevier B.V. All rights reserved.
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