LiFe^sub 1-X^Mg^sub X^PO^sub 4^/C as cathode materials for lithium-ion batteries

LiFe^sub 1-X^Mg^sub X^PO^sub 4^/C as cathode materials for lithium-ion batteries

A cathode nanomaterial LiFe0.8Mg0.2PO4 with olivine structure was synthesized by the sol-gel method and studied using X-ray diffraction analysis, scanning electron microscopy, Mössbauer spectroscopy and electrochemical testing under the operating conditions of a lithium-ion battery. It is demonstrat...

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Veröffentlicht in:Solid state ionics 2018-04, Vol.317, p.149
Hauptverfasser: Yaroslavtsev, Sergey, Novikova, Svetlana, Rusakov, Vyacheslav, Vostrov, Nikita, Kulova, Tatyana, Skundin, Alexander, Yaroslavtsev, Andrey
Format: Artikel
Sprache:eng
Schlagworte:
Batteries
Cathodes
Conductivity
Diffraction
Electrode materials
Iron
Lithium-ion batteries
Mossbauer spectroscopy
Nanomaterials
Olivine
Rechargeable batteries
Scanning electron microscopy
Sol-gel processes
X-ray diffraction
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Zusammenfassung:A cathode nanomaterial LiFe0.8Mg0.2PO4 with olivine structure was synthesized by the sol-gel method and studied using X-ray diffraction analysis, scanning electron microscopy, Mössbauer spectroscopy and electrochemical testing under the operating conditions of a lithium-ion battery. It is demonstrated that the iron substitution with magnesium occurs in the studied material. Discharge capacity of LiFe0.8Mg0.2PO4/С is 127 mAh g−1 at a current of 20 mA g−1 and is close to the theoretical value for the considered composition. It is determined utilizing Mössbauer spectroscopy that at the early stage of the LiFe0.8Mg0.2PO4 charging process nanoscale regions are formed, having a FePO4 structure and an enhanced solubility of divalent iron ions.
ISSN:0167-2738
1872-7689