Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 793, Issue -, Pages 620-626Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.04.232
Keywords
Electrode materials; Chemical synthesis; Hydrangea-like structure; Bi-metal sulfides
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Funding
- National Natural Science Foundation of China [51671173, 51571179]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
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To circumvent the poor cycling stability of 2D layered metal sulfide, a novel yolk-shell hydrangea-like SnSb-S microflower composite self-assembled by nanosheets, was successfully designed and fabricated as anode material for sodium-ion batteries. Without any introduction of carbonaceous materials, the Sn-SbS microflower composite could possess prominent sodium-ion storage properties through constructing Sb-rich phase with superior cycling stability as the protective shell to envelop the higher-capacity yolk Sn-rich phase. The yolk-shell Sn-Sb-S microflower composite exhibits a first discharge capacity of 1601.1 mAh/g. A highly reversible capacity of >600 mAh/g with a favorable and safe average voltage of similar to 0.6 V was achieved, constituting a promising anode material for sodium-ion batteries. (C) 2019 Elsevier B.V. All rights reserved.
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