Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent

Y. N. Ko; J. H. Kim; Y. J. Hong; Y. C. Kang

doi:10.1016/j.matchemphys.2011.09.044

Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent

Y. N. Ko, J. H. Kim, Y. J. Hong, Y. C. Kang

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Li₃V₂(PO₄)₃/C nanoparticles are prepared by spray pyrolysis. Particles formed from spray solutions containing citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents are large and hollow with thin walls. Theoptimumconcentrations of citric acid andEDTAare each 0.1 M. Powders subsequently treated at 700 °C under a reducing atmosphere have particles of single phase, monoclinic Li ₃V₂(PO₄)₃. The Li₃V ₂(PO₄)₃/C powders contains 14.9 wt% carbon. The hollow structures are easily pulverized into nanoparticles by simple milling process. However, Li₃V₂(PO₄)₃ powder formed from spray solution without chelating agent has larger, aggregated structures. Both powders' charge curves show four plateaus at ca. 3.62, 3.70, 4.08 and 4.55 V. The initial discharge capacities of the Li₃V ₂(PO₄)₃/C powders at constant current densities of 0.1, 1 and 3 C were 147, 122 and 86mAhg^-1, respectively. The capacity retention of the Li₃V₂(PO₄) ₃/C nanoparticles at a high current density of 1 C after 100th cycle was 78%.

Original language	English
Pages (from-to)	292-296
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	131
Issue number	1-2
DOIs	https://doi.org/10.1016/j.matchemphys.2011.09.044
Publication status	Published - 2011 Dec 15
Externally published	Yes

Keywords

Chemical synthesis
Composite materials
Electrochemical properties
Nanostructures

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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10.1016/j.matchemphys.2011.09.044

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title = "Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent",

abstract = "Li3V2(PO4)3/C nanoparticles are prepared by spray pyrolysis. Particles formed from spray solutions containing citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents are large and hollow with thin walls. Theoptimumconcentrations of citric acid andEDTAare each 0.1 M. Powders subsequently treated at 700 °C under a reducing atmosphere have particles of single phase, monoclinic Li 3V2(PO4)3. The Li3V 2(PO4)3/C powders contains 14.9 wt% carbon. The hollow structures are easily pulverized into nanoparticles by simple milling process. However, Li3V2(PO4)3 powder formed from spray solution without chelating agent has larger, aggregated structures. Both powders' charge curves show four plateaus at ca. 3.62, 3.70, 4.08 and 4.55 V. The initial discharge capacities of the Li3V 2(PO4)3/C powders at constant current densities of 0.1, 1 and 3 C were 147, 122 and 86mAhg-1, respectively. The capacity retention of the Li3V2(PO4) 3/C nanoparticles at a high current density of 1 C after 100th cycle was 78%.",

keywords = "Chemical synthesis, Composite materials, Electrochemical properties, Nanostructures",

author = "Ko, {Y. N.} and Kim, {J. H.} and Hong, {Y. J.} and Kang, {Y. C.}",

note = "Funding Information: This study was supported by a grant ( M2009010025 ) from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (MKE), Republic of Korea . This study was supported by Seoul R&BD Program ( WR090671 ). This study was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (no. 2009-0074023 ).",

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doi = "10.1016/j.matchemphys.2011.09.044",

language = "English",

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AU - Ko, Y. N.

AU - Kim, J. H.

AU - Hong, Y. J.

AU - Kang, Y. C.

N1 - Funding Information: This study was supported by a grant ( M2009010025 ) from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (MKE), Republic of Korea . This study was supported by Seoul R&BD Program ( WR090671 ). This study was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST) (no. 2009-0074023 ).

PY - 2011/12/15

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N2 - Li3V2(PO4)3/C nanoparticles are prepared by spray pyrolysis. Particles formed from spray solutions containing citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents are large and hollow with thin walls. Theoptimumconcentrations of citric acid andEDTAare each 0.1 M. Powders subsequently treated at 700 °C under a reducing atmosphere have particles of single phase, monoclinic Li 3V2(PO4)3. The Li3V 2(PO4)3/C powders contains 14.9 wt% carbon. The hollow structures are easily pulverized into nanoparticles by simple milling process. However, Li3V2(PO4)3 powder formed from spray solution without chelating agent has larger, aggregated structures. Both powders' charge curves show four plateaus at ca. 3.62, 3.70, 4.08 and 4.55 V. The initial discharge capacities of the Li3V 2(PO4)3/C powders at constant current densities of 0.1, 1 and 3 C were 147, 122 and 86mAhg-1, respectively. The capacity retention of the Li3V2(PO4) 3/C nanoparticles at a high current density of 1 C after 100th cycle was 78%.

AB - Li3V2(PO4)3/C nanoparticles are prepared by spray pyrolysis. Particles formed from spray solutions containing citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents are large and hollow with thin walls. Theoptimumconcentrations of citric acid andEDTAare each 0.1 M. Powders subsequently treated at 700 °C under a reducing atmosphere have particles of single phase, monoclinic Li 3V2(PO4)3. The Li3V 2(PO4)3/C powders contains 14.9 wt% carbon. The hollow structures are easily pulverized into nanoparticles by simple milling process. However, Li3V2(PO4)3 powder formed from spray solution without chelating agent has larger, aggregated structures. Both powders' charge curves show four plateaus at ca. 3.62, 3.70, 4.08 and 4.55 V. The initial discharge capacities of the Li3V 2(PO4)3/C powders at constant current densities of 0.1, 1 and 3 C were 147, 122 and 86mAhg-1, respectively. The capacity retention of the Li3V2(PO4) 3/C nanoparticles at a high current density of 1 C after 100th cycle was 78%.

KW - Chemical synthesis

KW - Composite materials

KW - Electrochemical properties

KW - Nanostructures

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Electrochemical properties of nano-sized Li3V2(PO4)3/C composite powders prepared by spray pyrolysis from spray solution with chelating agent

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