Synthesis and characterization of in situ carbon-coated Li2FeSiO4 cathode materials for lithium ion battery

Yan, Zipeng; Cai, Shu; Miao, Lijuan; Zhou, Xin; Zhao, Yongming

doi:10.1016/j.jallcom.2011.08.095

Cited by 53 publications

(22 citation statements)

References 27 publications

(35 reference statements)

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“…Lepidolite, K(Li,Al) 3 (Si,Al) 4 O 10 (F,OH) 2 , is a secondary source of lithium and is one of the major sources of rubidium and cesium elements. Besides the well known application of lithium compounds in dosimetry (TLD-100 [1], Gr-200 [2]), 6 Li is used as raw material for tritium production and as a neutron absorber in nuclear fusion [3].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, lithium minerals are employed in batteries [4] and in the manufacture of glass [4] and ceramics [5]; among others. This is a phyllosilicate mineral of the mica group showing complex variable compositions because of the tendency for isovalent and heterovalent isomorphism substitutions to form series with muscovite and other Lirich micas such as zinnwaldite [6].…”

Section: Introductionmentioning

confidence: 99%

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Thermo- and cathodoluminescence properties of lepidolite

Rodrı́guez-Lazcano

Correcher

García-Guinea

2013

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Lepidolite, K(Li,Al) 3 (Si,Al) 4 O 10 (F,OH) 2 , and many of the related phyllosilicate mineral of the mica group have been well studied from the chemical and structural point of view; however, to the best of our knowledge, studies on their luminescence properties have been scarcely reported. This work focuses on the thermoluminescence (TL) and cathodoluminescence (CL) response of a natural lepidolite from Portugal previously characterized by means of environmental scanning electron microscope (ESEM) and Xray fluorescence (XRF) and atomic absorption spectroscopy (AAS) techniques. The complexity of the thermoluminescence glow curves of non-irradiated and 1Gy irradiated samples suggests a structure of a continuous trap distribution involving multiorder kinetics. UV-IR CL spectral emission shows seven peaks centered at 330, 397, 441, 489, 563, 700 and 769 nm. Such emission bands could be due to (i) structural defects, i. e.[AlO 4 ] or non-bridging oxygen hole centers, and (ii) the presence of point defects associated with Mn 2+ and Fe 3+ .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermo- and cathodoluminescence properties of lepidolite

Rodrı́guez-Lazcano

Correcher

García-Guinea

2013

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The open pores might be resulted from the large amounts of gases produced upon an appropriate heating rate and released from the decomposition of sucrose 17 and iron nitrate nonahydrate. 16 Electrochemical performances.-The discharge capacity in the potential range of 1.5∼4.8 V and the corresponding coulombic efficiency as a function of cycle number are compared in Fig. 5 for Sample A and Sample B.…”

Section: Resultsmentioning

confidence: 99%

Improved Performance of Li₂FeSiO₄/C Composite with Highly Rough Mesoporous Morphology

Yang

et al. 2013

J. Electrochem. Soc.

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The Li 2 FeSiO 4 /C composites were prepared using iron starting materials of either insoluble ferrous (FeC 2 O 4 · 2H 2 O) or soluble ferric (Fe(NO 3 ) 3 · 9H 2 O) compounds through sol-gel process and solid state reaction. The pure monoclinic P2 1 /n with the rough surface consisting of a large amount of open pores was obtained using ferric iron source, while the sphere-like nanoparticles containing major impurities of Fe 3 O 4 (γ-Fe 2 O 3 ) and Li 2 SiO 3 were obtained using ferrous iron source. With less expensive ferric nitrate and faster heating rate, the excellent diffusion coefficients of 1.88 × 10 −8 cm 2 s −1 at 25 • C and 1.42 × 10 −7 cm 2 s −1 at 55 • C were obtained with the highly rough mesoporous morphology due to the enhanced interfacial kinetics with the apparent reductions in the charge transfer resistance and significant reductions in the migration resistance at the higher temperature. Coupled with higher degree of graphitized carbon, the initial and maximum discharge capacities of 213.9 and 239.2 mAh g −1 could be achieved at 55 • C and C/16 based on 50 cycles of charge/discharge testing at 25 • C.

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“…At lower rate, however, the performance is improved. The capacity retention reaches 135 mAh g À1 at rate C/16, and is stable over 40 cycles [222]. Porous Li 2 FeSiO 4 / C nanocomposite with 8.06 wt% carbon showed a capacity of 176.8 mAh g À1 at 0.5C in the first cycle and a reversible capacity of 132 mAh g À1 at 1C (1C ¼ 160 mA g À1 ) in the 50th cycle [223].…”

Section: Nasicon-like Compoundsmentioning

confidence: 97%

Polyanionic Compounds as Cathode Materials

et al. 2016

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Synthesis and characterization of in situ carbon-coated Li2FeSiO4 cathode materials for lithium ion battery

Cited by 53 publications

References 27 publications

Thermo- and cathodoluminescence properties of lepidolite

Thermo- and cathodoluminescence properties of lepidolite

Improved Performance of Li₂FeSiO₄/C Composite with Highly Rough Mesoporous Morphology

Polyanionic Compounds as Cathode Materials

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Synthesis and characterization of in situ carbon-coated Li2FeSiO4 cathode materials for lithium ion battery

Cited by 53 publications

References 27 publications

Thermo- and cathodoluminescence properties of lepidolite

Thermo- and cathodoluminescence properties of lepidolite

Improved Performance of Li2FeSiO4/C Composite with Highly Rough Mesoporous Morphology

Polyanionic Compounds as Cathode Materials

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Product

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Improved Performance of Li₂FeSiO₄/C Composite with Highly Rough Mesoporous Morphology