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Dive into the research topics where Chutchamon Sirisopanaporn is active.

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Featured researches published by Chutchamon Sirisopanaporn.


Journal of Materials Chemistry | 2011

Silicate cathodes for lithium batteries: alternatives to phosphates?

M. Saiful Islam; Robert Dominko; Christian Masquelier; Chutchamon Sirisopanaporn; A. Robert Armstrong; Peter G. Bruce

Polyoxyanion compounds, particularly the olivine-phosphate LiFePO4, are receiving considerable attention as alternative cathodes for rechargeable lithium batteries. More recently, an entirely new class of polyoxyanion cathodes based on the orthosilicates, Li2MSiO4 (where M = Mn, Fe, and Co), has been attracting growing interest. In the case of Li2FeSiO4, iron and silicon are among the most abundant and lowest cost elements, and hence offer the tantalising prospect of preparing cheap and safe cathodes from rust and sand! This Highlight presents an overview of recent developments and future challenges of silicate cathode materials focusing on their structural polymorphs, electrochemical behaviour and nanomaterials chemistry.


Journal of the American Chemical Society | 2011

Dependence of Li2FeSiO4 Electrochemistry on Structure

Chutchamon Sirisopanaporn; Christian Masquelier; Peter G. Bruce; A. Robert Armstrong; Robert Dominko

Small differences in the FeO(4) arrangements (orientation, size, and distortion) do influence the equilibrium potential measured during the first oxidation of Fe(2+) to Fe(3+) in all polymorphs of Li(2)FeSiO(4).


Inorganic Chemistry | 2010

Crystal Structure of a New Polymorph of Li2FeSiO4

Chutchamon Sirisopanaporn; Adrien Boulineau; Darko Hanzel; Robert Dominko; Bojan Budic; A. Robert Armstrong; Peter G. Bruce; Christian Masquelier

We report on the crystal structure of a new polymorph of Li(2)FeSiO(4) (prepared by annealing under argon at 900 degrees C and quenching to 25 degrees C) characterized by electron microscopy and powder X-ray and neutron diffraction. The crystal structure of Li(2)FeSiO(4) quenched from 900 degrees C is isostructural with Li(2)CdSiO(4), described in the space group Pmnb with lattice parameters a = 6.2836(1) A, b = 10.6572(1) A, and c = 5.0386(1) A. A close comparison is made with the structure of Li(2)FeSiO(4) quenched from 700 degrees C, published recently by Nishimura et al. (J. Am. Chem. Soc. 2008, 130, 13212). The two polymorphs differ mainly on the respective orientations and alternate sequences of corner-sharing FeO(4) and SiO(4) tetrahedra.


Journal of The Electrochemical Society | 2010

On the Origin of the Electrochemical Capacity of Li2Fe0.8Mn0.2SiO4

Robert Dominko; Chutchamon Sirisopanaporn; Christian Masquelier; Darko Hanzel; Iztok Arčon; Miran Gaberšček

On the Origin of the Electrochemical Capacity of Li2Fe0.8Mn0.2SiO4 Robert Dominko, Chutchamon Sirisopanaporn,* Christian Masquelier, Darko Hanzel, Iztok Arcon, and Miran Gaberscek** National Institute of Chemistry, SI-1001 Ljubljana, Slovenia ALISTORE-European Research Institute, 80039 Amiens Cedex, France Universite de Picardie Jules Verne, 80039 Amiens, France Jozef Stefan Institute, SI-1000 Ljubljana, Slovenia University of Nova Gorica, SI-5000 Nova Gorica, Slovenia Faculty for Chemistry and Chemical Technology, University of Ljubljana, 1000 Ljubljana, Slovenia


Journal of Materials Chemistry | 2011

Polymorphism in Li2(Fe,Mn)SiO4: A combined diffraction and NMR study

Chutchamon Sirisopanaporn; Robert Dominko; Christian Masquelier; A. Robert Armstrong; Gregor Mali; Peter G. Bruce

Li2MSiO4 compounds have been attracting significant attention as lithium intercalation compounds for the next generation of rechargeable lithium batteries. Their structures consist of slightly distorted close packed oxygen slabs between which cations occupy half the tetrahedral sites, leading to a range of polymorphs. In this paper we describe the rich polymorphism observed across the Li2FezMn(1−z)SiO4 solid solution, characterized by detailed powder neutron and X-ray diffraction studies, combined with solid state NMR. This polymorphism reflects that seen in the end-members, with a gradual transition from Fe-like behaviour for iron-rich compositions, to Mn-like behaviour with increasing manganese content.


Solid State Nuclear Magnetic Resonance | 2012

Understanding 6Li MAS NMR spectra of Li2MSiO4 materials (M=Mn, Fe, Zn)

Gregor Mali; Mojca Rangus; Chutchamon Sirisopanaporn; Robert Dominko

Analysis of (6)Li MAS NMR spectra of several lithium transition-metal orthosilicates (Li(2)MSiO(4), M = Mn, Fe, Zn) improved the understanding of the relation between the spectral parameters and the structural characteristics of the materials. It was shown that for manganese- and iron-containing materials the width of the (6)Li spinning-sideband powder patterns can be roughly related to the arrangement of the transition-metal cations within the first cation coordination sphere around lithium. In mixed zinc-manganese lithium orthosilicates the (6)Li isotropic shift depends on the number of Li-O-Mn bonds, in which a particular lithium site is involved. Each bond contributes a small negative Fermi-contact hyperfine shift of about -20 to -40 ppm. The precise values of the contributions cannot be easily related to the geometry of the bonds. In iron-containing materials the isotropic shifts are composed of two contributions, the hyperfine shift and the pseudo-contact shift. The latter depends on the anisotropy of the magnetic susceptibility of the material. The magnetic properties of the iron-containing lithium orthosilicates are responsible also for very broad lines within their (6)Li MAS NMR spectra. Pure zinc-lithium orthosilicate exhibits a narrow (6)Li MAS NMR isotropic signal and no spinning-sideband powder pattern.


Dalton Transactions | 2010

Polymorphism and structural defects in Li2FeSiO4

Adrien Boulineau; Chutchamon Sirisopanaporn; Robert Dominko; A. Robert Armstrong; Peter G. Bruce; Christian Masquelier


Chemistry of Materials | 2011

Li2FeSiO4 Polymorphs Probed by 6Li MAS NMR and 57Fe Mössbauer Spectroscopy

Gregor Mali; Chutchamon Sirisopanaporn; Christian Masquelier; Darko Hanzel; Robert Dominko


Zeitschrift für anorganische und allgemeine Chemie | 2014

Polymorphism in Li2MSiO4 (M = Fe, Mn): A Variable Temperature Diffraction Study †‡

A. Robert Armstrong; Chutchamon Sirisopanaporn; Paul Adamson; Juliette Billaud; Robert Dominko; Christian Masquelier; Peter G. Bruce


Inorganic Chemistry | 2010

Crystal Structure of a New Polymorph of Li 2 FeSiO 4

Chutchamon Sirisopanaporn; Adrien Boulineau; Darko Hanzel; Robert Dominko; Bojan Budic; A. Robert Armstrong; Peter G. Bruce; Christian Masquelier

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Robert Dominko

Centre national de la recherche scientifique

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Christian Masquelier

University of Picardie Jules Verne

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Darko Hanzel

Centre national de la recherche scientifique

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Christian Masquelier

University of Picardie Jules Verne

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Adrien Boulineau

University of Picardie Jules Verne

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Bojan Budic

Centre national de la recherche scientifique

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