Lithium extraction/insertion in LiFePO4: an X-ray diffraction and Mössbauer spectroscopy study

Andersson, Anna; Kalska, B.; Häggström, Lennart; Thomas, John O.

doi:10.1016/s0167-2738(00)00311-8

Cited by 664 publications

(514 citation statements)

References 27 publications

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“…A c c e p t e d M a n u s c r i p t 4 studied LiMPO 4 (M = Fe, Co, Mn, Ni) cathodes [9][10][11][12]. Despite these advantages, there are challenges associated with the practical application of LiCoPO 4 [9,10,[13][14][15][16] such as poor conductivity and slow lithium transport kinetics.…”

Section: Page 4 Of 27mentioning

confidence: 99%

Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior

Gangulibabu

Kalaiselvi

Meyrick

et al. 2013

Electrochimica Acta

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Heating the carbonate rich precursor in an inert atmosphere produces a Co 2 P phase that is conductive. Addition of super P carbon resulted in an amorphous carbon coating on LiCoPO 4 particles. LiCoPO 4 /C nanorods with a co-existence of Co 2 P exhibit excellent discharge capacity with retention on multiple cycling. AbstractLiCoPO 4 /C nanocomposite with growth controlled by carbonate anions was synthesized via a unique solid-state fusion method. Carbonate anions in the form of H 2 CO 3 or a mixture of H 2 CO 3 + (NH 4 ) 2 CO 3 have been used as a growth inhibiting modifier to produce morphology controlled lithium cobalt phosphate. The presence of cobalt phosphide (Co 2 P) as a second phase improved the conductivity and electrochemical properties of the parent LiCoPO 4. The formation of Co 2 P is found to be achievable only in

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Section: Page 4 Of 27mentioning

confidence: 99%

Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior

Gangulibabu

Kalaiselvi

Meyrick

et al. 2013

Electrochimica Acta

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“…Lithium extraction/insertion process in Li 2 FeSiO 4 is completely reversible with a lowering of the potential plateau from 3.10 to 2.80 V during the first cycle. This phenomenon was studied by in-situ XRD and in-situ Mössbauer spectroscopy, often used for study of Fe-based materials [14,15]. From these insitu techniques a possible mechanism of the voltage shift in the oxidation process during lithium removal from Li 2 FeSiO 4 has been proposed [7].…”

Section: Introductionmentioning

confidence: 99%

In-situ XAS study on Li2MnSiO4 and Li2FeSiO4 cathode materials

Dominko

Arčon

Kodre

et al. 2009

Journal of Power Sources

125

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“…Matching of experimental diffraction pattern and simulated diffraction templates for the determination of crystal orientation and phase identification has been computed using the ACOM-TEM NanoMegas software package. The banks (database) of the diffraction templates have been calculated based on the LFP and FP crystal structures with the axes defined as a = 10.329 Å, b = 6.006 Å and c = 4.691 Å for LFP and a = 9.814 Å, b = 5.789 Å and c = 4.782 Å for FP [22]. More details for the templates matching are described in the supplementary information section 2 (SI.2).…”

Section: Acom-temmentioning

confidence: 99%

Comprehensive analysis of TEM methods for LiFePO4/FePO4 phase mapping: spectroscopic techniques (EFTEM, STEM-EELS) and STEM diffraction techniques (ACOM-TEM)

Kobler

Wang

et al. 2016

Ultramicroscopy

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Transmission electron microscopy (TEM) has been used intensively in investigating battery materials, e.g. to obtain phase maps of partially (dis)charged (lithium) iron phosphate (LFP/FP), which is one of the most promising cathode material for next generation lithium ion (Li-ion) batteries. Due to the weak interaction between Li atoms and fast electrons, mapping of the Li distribution is not straightforward. In this work, we revisited the issue of TEM measurements of Li distribution maps for LFP/FP. Different TEM techniques, including spectroscopic techniques (energy filtered (EF)TEM in the energy range from low-loss to core-loss) and a STEM diffraction technique (automated crystal orientation mapping (ACOM)), were applied to map the lithiation of the same location in the same sample. This enabled a direct comparison of the results. The maps obtained by all methods showed excellent agreement with each other. Because of the strong difference in the imaging mechanisms, it proves the reliability of both the spectroscopic and STEM diffraction phase mapping. A comprehensive comparison of all methods is given in terms of information content, dose level, acquisition time and signal quality. The latter three are crucial for the design of in-situ experiments with beam sensitive Li-ion battery materials. Furthermore, we demonstrated the power of STEM diffraction (ACOM-STEM) providing additional crystallographic information, which can be analyzed to gain a deeper understanding of the LFP/FP interface properties such as statistical information on phase boundary orientation and misorientation between domains.

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Lithium extraction/insertion in LiFePO4: an X-ray diffraction and Mössbauer spectroscopy study

Cited by 664 publications

References 27 publications

Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior

Carbonate anion controlled growth of LiCoPO4/C nanorods and its improved electrochemical behavior

In-situ XAS study on Li2MnSiO4 and Li2FeSiO4 cathode materials

Comprehensive analysis of TEM methods for LiFePO4/FePO4 phase mapping: spectroscopic techniques (EFTEM, STEM-EELS) and STEM diffraction techniques (ACOM-TEM)

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