Electrochemical lithium insertion into In16Sn4S32 and Cu4In20S32 spinel sulphides

Autor:	Julián Morales, José L. Tirado, M.L. Elidrissi Moubtassim, Jean-Claude Jumas, Josette Olivier-Fourcade
Rok vydání:	1995
Předmět:	Mechanical Engineering Spinel Inorganic chemistry Intercalation (chemistry) Metals and Alloys chemistry.chemical_element engineering.material Electrochemistry Copper Ion Crystallography chemistry Octahedron Mechanics of Materials Materials Chemistry engineering Tin Indium
Zdroj:	Journal of Alloys and Compounds. 217:176-180
ISSN:	0925-8388
DOI:	10.1016/0925-8388(94)01309-6
Popis:	Cu4In20S32 and In16Sn4S32 spinel compounds are used as cathode material in Li/LiClO4(PC)/sulphide cells. For both compounds, incremental capacity vs. voltage curves and diffusion coefficients vs. composition curves showed two consecutive steps of intercalation. The first step occurs between x = 0 and x = 8 for both compositions and at a higher voltage for the tin compound. For larger x values an extended plateau is observed in the voltage vs. composition curves. Cation redistribution is observed during the first insertion step leading to a displacement of In ions from either 8a or 16d sites to another set of octahedral 16c sites in the Fd3m space group. This process is more marked in the copper compound owing to the absence of tetrahedral vacancies in the pristine phase and conditions a lower diffusivity of lithium ions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1f9f2da54feea1a2685c815c1d4997ac https://doi.org/10.1016/0925-8388(94)01309-6 Zobrazit plný text záznamu Full Text from ScienceDirect