Crystal Structure of a New Polymorph of Li<sub>2</sub>FeSiO<sub>4</sub>

Sirisopanaporn, Chutchamon; Boulineau, Adrien; Hanžel, D.; Dominko, Robert; Budič, Bojan; Armstrong, A. Robert; Bruce, Peter G.; Masquelier, Christian

doi:10.1021/ic100741x

Cited by 111 publications

(87 citation statements)

References 24 publications

(41 reference statements)

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“…Of the different polymorphs of Li2FeSiO4 proposed, the isomer shift and quadrupole splitting values of both, the pristine and doped materials, match with those of the monoclinic structure P21/n. [17][18][19][20][21] This result is supported by the XRD and FTIR analysis. The quadrupole splitting was found to increase monotonically with increasing Mg content, suggesting a diminishing distortion of the iron sites.…”

Section: Resultssupporting

confidence: 64%

Characterization of Magnesium Doped Lithium Iron Silicate

et al. 2015

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Abstract:The synthesis of Mg doped Li2Fe1-xMgxSiO4 (x = 0, 0.10 and 0.15) via solid-state reaction is reported. The product was characterized by Mössbauer spectroscopy (MS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), magnetic measurements and scanning electron microscopy (SEM). The structures of the reaction products were confirmed to be the monoclinic structure P21/n, but impurities were detected in them. In the undoped sample small amounts of lithium iron oxide or lithiated magnetite was obtained, whereas a magnetic phase was found in samples with more than 10 % (mole fraction) of Mg doping.

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Section: Resultssupporting

confidence: 64%

Characterization of Magnesium Doped Lithium Iron Silicate

et al. 2015

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“…More recently this description has been simplified using the higher symmetry space group P2 1 /n. 7b, 17 Sirisopanaporn et al 16 have described the crystal structure of a new g II -polymorph of Li 2 FeSiO 4 , Fig. 1(e), obtained by quenching from 900 C; the structure was established by electron microscopy, XRD, and neutron diffraction; it is isostructural with Li 2 CdSiO 4 (space group Pmnb), and differs from the g s structure obtained by quenching from 800 C. 7 A simple b II polymorph ( Fig.…”

Section: Fesiomentioning

confidence: 99%

Silicate cathodes for lithium batteries: alternatives to phosphates?

et al. 2011

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Polyoxyanion compounds, particularly the olivine-phosphate LiFePO 4 , are receiving considerable attention as alternative cathodes for rechargeable lithium batteries. More recently, an entirely new class of polyoxyanion cathodes based on the orthosilicates, Li 2 MSiO 4 (where M ¼ Mn, Fe, and Co), has been attracting growing interest. In the case of Li 2 FeSiO 4 , 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.

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“…During last few years several different technics of Li2MnSiO4 synthesis were proposed. Hydrothermal synthesis [21][22][23][24] as well as solid-state reactions [25][26][27][28] can lead to one phase product but the control of the grain size is significantly limited. Sol-gel method is one of the soft chemistry techniques which can be used in synthesis of nanosized lithium orthosilicates [29][30][31][32][33].…”

Section: Li2mnsio4 Nanostructured Cathode Materialsmentioning

confidence: 99%