Micro-Intertexture Carbon-Free Iron Sulfides as Advanced High Tap Density Anodes for Rechargeable Batteries
- Authors
- Xiao, Ying; Hwang, Jang-Yeon; Sun, Yang-Kook
- Issue Date
- Nov-2017
- Publisher
- AMER CHEMICAL SOC
- Keywords
- micro-iron sulfide; carbon-free; high tap density; electrochemical performance; rechargeable batteries
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.9, no.45, pp.39416 - 39424
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 9
- Number
- 45
- Start Page
- 39416
- End Page
- 39424
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/5359
- DOI
- 10.1021/acsami.7b13239
- ISSN
- 1944-8244
- Abstract
- Numerous materials have been considered as promising electrode materials for rechargeable batteries; however, developing efficient materials to achieving good cycling performance and high volumetric energy capacity simultaneously remains a great challenge. Considering the appealing properties of iron sulfides, which include low cost, high theoretical capacity, and favorable electrochemical conversion mechanism, in this work, we demonstrate the feasibility of carbon-free microscale Fe1–xS as high-efficiency anode materials for rechargeable batteries by designing hierarchical intertexture architecture. The as-prepared intertexture Fe1–xS microspheres constructed from nanoscale units take advantage of both the long cycle life of nanoscale units and the high tap density (1.13 g cm–3) of the micro-intertexture Fe1–xS. As a result, high capacities of 1089.2 mA h g–1 (1230.8 mA h cm–3) and 624.7 mA h g–1 (705.9 mA h cm–3) were obtained after 100 cycles at 1 A g–1 in Li-ion and Na-ion batteries, respectively, demonstrating one of the best performances for iron sulfide-based electrodes. Even after deep cycling at 20 A g–1, satisfactory capacities could be retained. Related results promote the practical application of metal sulfides as high-capacity electrodes with high rate capability for next-generation rechargeable batteries.
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