Hierarchical iron sulfide-graphene nanocubes consisting of multiple nanoparticles with superior sodium ion storage properties
- Authors
- Xiang, Juan; Liu, Zhiming; Song, Taeseup
- Issue Date
- Sep-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Iron sulfide; Graphene; Nanocubes; Hierarchical; Sodium ion full battery
- Citation
- ELECTROCHIMICA ACTA, v.283, pp.683 - 690
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 283
- Start Page
- 683
- End Page
- 690
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/3881
- DOI
- 10.1016/j.electacta.2018.07.017
- ISSN
- 0013-4686
- Abstract
- Hierarchical iron sulfide nanocubes consisting of multiple iron sulfide-carbon core-shell nanoparticles coated with few-layer graphene (Fe1-xS@C/rGO) were prepared by a two-step in-situ transformation strategy employing Prussian blue (PB) as a starting material. The hierarchical nanocubes delivered an outstanding rate capability of 323 mAh g−1 at the current density of 10 A g−1 when used as the anode of sodium ion half cells. An iron-based sodium-ion full cell composed of a hierarchical Fe1-xS@C/rGO anode and PB cathode had a capacity of 323 mAh g−1 for 150 cycles. We attributed the good sodium ion storage properties of the Fe1-xS@C/rGO nanocubes to the stable hierarchical building structures and the high graphitization degree of carbon obtained during the transformation process. The graphene-coated nanocube structures inhibited the agglomeration of iron sulfide-carbon core-shell nanoparticles and accommodated the huge volume expansion that occurred during cycling. The high graphitization degree of carbon endowed Fe1-xS@C/rGO nanocubes with high electronic conductivity, facilitated sodium ion accessibility, and increased mechanical durability.
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