Decarbonization of the Ce2Mn17C1.77 compound upon lithiation | Zendy

Mykola HEMBARA | Zendy; Vasyl Kordan | Zendy; Volodymyr Pavlyuk | Zendy; B. Kotur | Zendy

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Decarbonization of the Ce2Mn17C1.77 compound upon lithiation

Author(s) -

Mykola HEMBARA,

Vasyl Kordan,

Volodymyr Pavlyuk,

B. Kotur

Publication year - 2017

Publication title -

chemistry of metals and alloys

Language(s) - English

Resource type - Journals

eISSN - 1998-8087

pISSN - 1998-8079

DOI - 10.30970/cma10.0352

Subject(s) - isostructural , rietveld refinement , materials science , scanning electron microscope , carbide , ternary operation , electrochemistry , crystal structure , ternary compound , crystallography , anode , powder diffraction , electrode , analytical chemistry (journal) , metallurgy , chemistry , inorganic chemistry , composite material , chromatography , computer science , programming language

The ternary compound Ce2Mn 17C1.77 was investigated by means of X-ray powder diffract ion, scanning electron microscopy and energy-dispersive X-ray ana lysis. The structure type Pr2Mn 17C1.77 was confirmed using the Rietveld method. Electrochemical lithiati on of Ce2Mn 17C1.77 was carried out in Swagelok-type cells with a positive electrode containing LiCoO2 over 30 cycles. Decarbonization of the Ce 2Mn 17C1.77 ternary carbide upon lithiation was accompanied by a decrea se of the cell volume (from 847.9(2) Å 3 to 842.7(5) Å) and formation of α-Li 2C2, Li xCy carbides, and amorphization of the Ce 2Mn 17 subcell. The morphology of the anode surface underwent changes and the grain size of the material decreased.

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