Iron Telluride-Decorated Reduced Graphene Oxide Hybrid Microspheres as Anode Materials with Improved Na-Ion Storage Properties
- Authors
- Cho, Jung Sang; Lee, Seung Yeon; Lee, Jung-Kul; Kang, Yun Chan
- Issue Date
- 24-8월-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- iron telluride; sodium ion batteries; graphene; carbon hybrid; spray pyrolysis
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.33, pp.21343 - 21349
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 33
- Start Page
- 21343
- End Page
- 21349
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/87788
- DOI
- 10.1021/acsami.6b05758
- ISSN
- 1944-8244
- Abstract
- Transition-metal telluride materials are studied as the anode materials for Na-ion batteries (NIBs). The FeTe2-reduced graphene oxide (rGO) hybrid powders (first target material) are prepared via spray pyrolysis and subsequent tellurization. The H2Te gas treatment transforms the Fe3O4 rGO powders to FeTe2-rGO hybrid powders with FeTe2 nanocrystals (various sizes <100 nm) embedded within the rGO. The FeTe2-rGO hybrid powders contain 5 wt % rGO. The Na-ion storage mechanism for FeTe2 in NIBS is described by FeTe2 + 4Na(+) + 4e(-)<-> Fe + 2Na(2)Te. The FeTe2-rGO hybrid discharge process forms metallic Fe nanocrystals and Na2Te by a conversion reaction of FeTe2 with Na ions. The discharge capacities of the FeTe2-rGO hybrid powders for the first and 80th cycles are 493 and 293 mA h g(-1), respectively. The discharge capacities of the bare FeTe2 powders for the first and 80th cycles are 462 and 83 mA h g(-1), respectively. The FeTe2-rGO hybrid powders have superior Na-ion storage properties compared to bare FeTe, powders owing to their high structural stability and electrical conductivity.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.