Surfactant-Assisted Synthesis of Fe2O3 Nanoparticles and F-Doped Carbon Modification toward an Improved Fe3O4@CFx/LiNi0.5Mn1.5O4 Battery
- Authors
- Ming, Hai; Ming, Jun; Oh, Seung-Min; Tian, Shu; Zhou, Qun; Huang, Hui; Sun, Yang Kook; Zheng, Junwei
- Issue Date
- Sep-2014
- Publisher
- AMER CHEMICAL SOC
- Keywords
- nanoparticles; oxides; carbon; electrochemical properties; batteries
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.6, no.17, pp.15499 - 15509
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 6
- Number
- 17
- Start Page
- 15499
- End Page
- 15509
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/25794
- DOI
- 10.1021/am504144d
- ISSN
- 1944-8244
- Abstract
- A simple surfactant-assisted reflux method was used in this study for the synthesis of cocklebur-shaped Fe2O3 nanoparticles (NPs). With this strategy, a series of nanostructured Fe2O3 NPs with a size distribution ranging from 20 to 120 nm and a tunable surface area were readily controlled by varying reflux temperature and the type of surfactant. Surfactants such as cetyltrimethylammonium bromide (CTAB), polyvinylpyrrolidone (PVP), poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (F127) and sodium dodecyl benzenesulfonate (SDBS) were used to achieve large-scale synthesis of uniform Fe2O3 NPs with a relatively low cost. A new composite of Fe3O4@CFx was prepared by coating the primary Fe2O3 NPs with a layer of F-doped carbon (CFx) with a one-step carbonization process. The Fe3O4@CFx composite was utilized as the anode in a lithium ion battery and exhibited a high reversible capacity of 900 mAh g(-1) at a current density of 100 mA g(-1) over 100 cycles with 95% capacity retention. In addition, a new Fe3O4@CFx/LiNi0.5Mn1.5O4 battery with a high energy density of 371 Wh kg(-1) (vs cathode) was successfully assembled, and more than 300 cycles were easily completed with 66.8% capacity retention at 100 mA g(-1). Even cycled at the high temperature of 45 degrees C, this full cell also exhibited a relatively high capacity of 91.6 mAh g(-1) (vs cathode) at 100 mA g(-1) and retained 54.6% of its reversible capacity over 50 cycles. Introducing CFx chemicals to modify metal oxide anodes and/or any other cathode is of great interest for advanced energy storage and conversion devices.
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