Crystal structure of lithium magnesium phosphate, LiMgPO4: Crystal chemistry of the olivine-type compounds

Hanic, F.; Handlovič, M.; Burdová, K.; Majling, J.

doi:10.1007/bf01161009

Cited by 63 publications

(36 citation statements)

References 32 publications

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“…The Rietveld refi ned X-ray diffration (XRD) patterns of the bare and surface coated Li-rich compounds are shown in Figure 3 and Figure S4 (Supporting Information). In addition, when the coating amount increases to 3.0 wt%, weak peaks of LiMgPO 4 olivine structure [ 22 ] can be observed in 2 θ from 20°-38°, as showed in Figure S3b (Supporting Information). It implies an expansion in the c axis of the crystal structure.…”

Section: Morphology and Surface Compositionmentioning

confidence: 91%

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

et al. 2015

Advanced Energy Materials

185

134

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Li-rich layered metal oxides have attracted much attention for their high energy density but still endure severe capacity fading and voltage decay during cycling, especially at elevated temperature. Here, facile surface treatment of Li 1.17 Ni 0.17 Co 0.17 Mn 0.5 O 2 (0.4Li 2 MnO 3 ·0.6LiNi 1/3 Co 1/3 Mn 1/3 O 2 ) spherical cathode material is designed to address these drawbacks by hybrid surface protection layers composed of Mg 2+ pillar and Li-Mg-PO 4 layer. As a result, the surface coated Li-rich cathode material exhibits much enhanced cycling stability at 60 °C, maintaining 72.6% capacity retention (180 mAh g −1 ) between 3.0 and 4.7 V after 250 cycles. More importantly, 88.7% average discharge voltage retention can be obtained after the rigorous cycle test. The strategy developed here with novel hydrid surface protection effect can provide a vital approach to inhibit the undesired side reactions and structural deterioration of Li-rich cathode materials and may also be useful for other layered oxides to increase their cycling stability at elevated temperature.

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Section: Morphology and Surface Compositionmentioning

confidence: 91%

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

et al. 2015

Advanced Energy Materials

185

134

View full text Add to dashboard Cite

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“…We report the microwave dielectric properties of a low-temperature sinterable LiMgPO 4 (LMP) ceramic for the first time and lowered its temperature coefficient of resonant frequency (t f ) by the formation of a composite with TiO 2 for LTCC applications. LMP has an olivine-type structure 17 with low bulk density (o3 g/cm 3 ) suitable for the fabrication of light-weight devices.…”

Section: Introductionmentioning

confidence: 99%

Temperature‐Compensated LiMgPO₄: A New Glass‐Free Low‐Temperature Cofired Ceramic

Thomas¹,

Sebastian²

2010

Journal of the American Ceramic Society

101

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The feasibility of LiMgPO4 (LMP) ceramic for low‐temperature cofired ceramic (LTCC) application was investigated. The ceramic was prepared by the conventional solid‐state ceramic method. The ceramic sintered at 950°C showed a relative permittivity (ɛr) of 6.6 and high quality factor (Qu×f) of 79 100 GHz with a τf of −55 ppm/°C. The relatively large negative τf value was lowered by preparing LMP–TiO2 composite. The composite with 0.12 volume fraction TiO2 showed good microwave dielectric properties: ɛr=10, Qu×f=26 900 GHz, and τf=+1.2 ppm/°C. LMP–TiO2 composite did not react with the commonly used electrode material silver.

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“…1 These materials exhibit a variety of structural features, the most prominent of which is the existence of tunnels in which small ions can move freely; a property that makes them potential hosts for the insertion and extraction of ions as cathode materials in rechargeable batteries. [1][2][3] In addition, depending on the choice of metal ions, well-defined low-dimensional systems in the form of chains or layers of magnetic ions can be identified in these compounds, making these materials suitable candidates for exploring low-dimensional physical systems. 4 LiNiPO 4 belongs to the olivine family of lithium orthophosphates LiM PO 4 (M ϭMn, Fe, Co, and Ni͒ ͑Ref.…”

Section: Introductionmentioning

confidence: 99%

Weakly(x=0)and randomly(x=0.033)coupled Ising antiferromagnetic planes in
Vaknin
¹
,
Zarestky
²
,
Ostenson
³

et al. 1999
Phys. Rev. B

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Neutron diffraction and magnetic susceptibility studies of (Li 1Ϫ3x Fe x )NiPO 4 (xϭ0 and xϭ0.033) compounds reveal remarkable differences between the magnetic properties of pure LiNiPO 4 and those of its lightly iron-doped derivative. The spin system associated with the Ni 2ϩ ions (Sϭ1) in the pure compound undergoes a collinear antiferromagnetic ordering at T N ϭ19.1Ϯ0.5 K, with the characteristics of weakly coupled twodimensional ͑2D͒ Ising square planes. By contrast, randomly intercalated iron spins ͑in Li sites͒ between Ni 2ϩ planes comprise a spin-glass-like subsystem which, despite their minute amount, drives the antiferromagnetic transition to higher temperatures T N ϭ25.2Ϯ0.5 K, and significantly modifies the critical behavior of the 2D Ni 2ϩ system. It is argued that the doped compound can serve as a model system for studying the randomly coupled planar Ising model. ͓S0163-1829͑99͒15425-0͔

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Crystal structure of lithium magnesium phosphate, LiMgPO4: Crystal chemistry of the olivine-type compounds

Cited by 63 publications

References 32 publications

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

Temperature‐Compensated LiMgPO₄: A New Glass‐Free Low‐Temperature Cofired Ceramic

Weakly(x=0)and randomly(x=0.033)coupled Ising antiferromagnetic planes in
Vaknin
¹
,
Zarestky
²
,
Ostenson
³

et al. 1999
Phys. Rev. B

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Crystal structure of lithium magnesium phosphate, LiMgPO4: Crystal chemistry of the olivine-type compounds

Cited by 63 publications

References 32 publications

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

Countering Voltage Decay and Capacity Fading of Lithium‐Rich Cathode Material at 60 °C by Hybrid Surface Protection Layers

Temperature‐Compensated LiMgPO4: A New Glass‐Free Low‐Temperature Cofired Ceramic

Weakly(x=0)and randomly(x=0.033)coupled Ising antiferromagnetic planes inVaknin1, Zarestky2, Ostenson3 et al. 1999Phys. Rev. B

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Product

Resources

About

Temperature‐Compensated LiMgPO₄: A New Glass‐Free Low‐Temperature Cofired Ceramic

Weakly(x=0)and randomly(x=0.033)coupled Ising antiferromagnetic planes in
Vaknin
¹
,
Zarestky
²
,
Ostenson
³

et al. 1999
Phys. Rev. B