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Synthesis and electrical properties of glassy and nanocrystalline LiFePO4
被引:2
作者:

Gadomski, Krzysztof
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Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland

Buchberger, Dominika A.
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Univ Warsaw, Fac Chem, Pasteura 1, PL-02093 Warsaw, Poland Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland

Pietrzak, Tomasz K.
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Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland
机构:
[1] Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland
[2] Univ Warsaw, Fac Chem, Pasteura 1, PL-02093 Warsaw, Poland
关键词:
Lithium iron phosphate;
Amorphous analogue;
Nanocrystallisation;
Electrical conductivity;
ELECTRONIC CONDUCTIVITY;
PHOSPHO-OLIVINES;
LITHIUM;
MORPHOLOGY;
PERFORMANCE;
TRANSPORT;
IMPACT;
D O I:
10.1016/j.jnoncrysol.2023.122771
中图分类号:
TQ174 [陶瓷工业];
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
Lithium iron phosphate (LFP) has been intensively studied as a cathode material for lithium-ion batteries. Mainly, polycrystalline or nanocrystalline LFP have been studied so far. Our approach is to synthesize glassy analogs of crystalline cathode materials and subject them to proper heat treatment to induce thermal nanocrystallization. In this paper, we attempted to synthesize amorphous LFP using the twin-rollers technique and improve its electrical properties. It was shown that in this approach LFP is on the verge of crystallization during quenching and most of the samples contained some traces of LFP crystallites. After optimization, the electrical conductivity of nanocrystalline samples reached ca. 10-5 S/cm at room temperature, and the activation energy decreased to 0.25 eV. Even though, the electrochemical performance of nanocrystalline LFP in laboratory Li cells in this work remained modest.
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