Amorphous Iron Oxyhydroxide Nanosheets: Synthesis, Li Storage, and Conversion Reaction Kinetics
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Other documents of the author: Xu, Chen; Zeng, Yi; Rui, Xianhong; Zhu, Jixin; Tan, Huiteng; Guerrero, Antonio; Toribio, Juan; Bisquert, Juan; Garcia-Belmonte, Germà; Yan, Qingyu
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comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Title
Amorphous Iron Oxyhydroxide Nanosheets: Synthesis, Li Storage, and Conversion Reaction KineticsAuthor (s)
Date
2013Publisher
American Chemical SocietyISSN
1932-7447; 1932-7455Bibliographic citation
XU, Chen, et al. Amorphous Iron Oxyhydroxide Nanosheets: Synthesis, Li Storage, and Conversion Reaction Kinetics. The Journal of Physical Chemistry C, 2013, vol. 117, no 34, p. 17462-17469.Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jp405848jVersion
info:eu-repo/semantics/submittedVersionSubject
Abstract
We present a facile approach to synthesize amorphous iron oxyhydroxide nanosheet from the surfactant-assisted oxidation of iron sulfide nanosheet. The amorphous iron oxyhydroxide nanosheet is porous and has a high ... [+]
We present a facile approach to synthesize amorphous iron oxyhydroxide nanosheet from the surfactant-assisted oxidation of iron sulfide nanosheet. The amorphous iron oxyhydroxide nanosheet is porous and has a high surface area of 223 m(2) g(-1). The lithium storage properties of the amorphous iron oxyhydroxide are characterized: it is a conversion-reaction electrode material, and it demonstrates superior rate capabilities (e.g., discharge capacities as high as 642 mAh g(-1) are delivered at a current density of 2 C). The impedance spectroscopy analysis identifies a RC series subcircuit originated by the conversion-reaction process. Investigation of the conversion-reaction kinetics through the RC subcircuit time constant reproduces the hysteresis in the discharge/charge voltage profile. Hysteresis is then connected to underlying thermodynamics of the conversion reaction rather than to a kinetic limitation. [-]
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The Journal of Physical Chemistry C (2013) vol. 117, no 34Rights
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