Onion-like crystalline WS2 nanoparticles anchored on graphene sheets as high-performance anode materials for lithium-ion batteries
- Authors
- Kim, Inha; Park, Sung-Woo; Kim, Dong-Wan
- Issue Date
- 1-11월-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Electrical explosion of wire process; Tungsten disulfide; Nanocomposite; Carbon coating; Lithium-ion battery
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.375
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 375
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/61958
- DOI
- 10.1016/j.cej.2019.122033
- ISSN
- 1385-8947
- Abstract
- In this study, onion-like crystalline WS2 nanoparticles uniformly anchored on graphene sheets (WS2@Gs) were prepared via ball milling using WO3 nanoparticles and graphene and subsequent sulfidation. They were then employed as high-performance anode materials for Li-ion batteries (LIBs). The ball-milling process facilitated uniform anchoring of WO3 nanoparticles with a diameter of similar to 15 nm on graphene nanosheets without aggregation, and the subsequent sulfidation caused phase transition of the WO3 nanoparticles to WS2 nanoparticles with an onion-like crystal lattice structure. As anode materials for LIB, the uniquely structured WS2@Gs nanocomposites exhibited excellent Li-ions storage performance, with a high reversible capacity of 587.1 mA h g(-1) at a current density of 200 mA g(-1). To enhance the cyclic stability of WS2@Gs, the C-coating method was employed by simply adding glucose during ball milling. Even at a high current density of 1000 mA g(-1), the C-coated WS2@Gs (C@WS2@Gs) electrode exhibited a remarkably high reversible capacity of 371.9 mA h g(-1) and appreciable cycling stability, with a high capacity retention of 62% without any drastic capacity fading after 500 cycles.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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