Liquid-phase step-by-step growth of an iron cyanide coordination framework on LiCoO sub(2) particle surfaces

Surface modification of inorganic objects with metal-organic frameworks (MOFs) - organic-inorganic hybrid framework materials with infinite networks - opens wide windows for potential applications. In order to derive a target property, the key is the ability to fine tune the degree of modification....

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2015-08, Vol.44 (34), p.15279-15285
Main Authors: Makiura, Rie, Teragawa, Shingo, Tsuchiyama, Kohei, Hayashi, Akitoshi, Tadanaga, Kiyoharu, Tatsumisago, Masahiro
Format: Article
Language:English
Subjects:
Deposition
Discharge
Electrochemical cells
Electrode materials
Electrolytes
Immersion
Lithium batteries
Storage batteries
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Summary:Surface modification of inorganic objects with metal-organic frameworks (MOFs) - organic-inorganic hybrid framework materials with infinite networks - opens wide windows for potential applications. In order to derive a target property, the key is the ability to fine tune the degree of modification. Solution-based step-by-step growth techniques provide excellent control of layer thickness which can be varied with the number of deposition cycles. Such techniques with MOFs have been mainly applied to flat substrates, but not to particle surfaces before. Here, we present the facile surface modification of inorganic particles with a framework compound under operationally simple ambient conditions. A solution-based sequential technique involving the alternate immersion of LiCoO sub(2) (LCO) - a positive electrode material for a lithium ion battery - into FeCl sub(2).4H sub(2)O and K sub(3)[Fe(CN) sub(6)] solutions results in the formation of Prussian blue (PB) nanolayers on the surface of the LCO particles (PBNL[at]LCO). The PB growth is finely controlled by the number of immersion cycles. An electrochemical cell with PBNL[at]LCO as a positive electrode material exhibits a discharge capacity close to the specific capacity of LCO. The results open a new direction for creating suitable interfacial conditions between electrode materials and electrolytes in secondary battery materials.
ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt00968e