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Lithiation of Copper Selenide Nanocrystals
Author(s) -
Banerjee Progna,
Jain Prashant K.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201803358
Subject(s) - selenide , nanocrystal , copper , electrolyte , materials science , ionic bonding , ion , inorganic chemistry , fast ion conductor , ionic conductivity , doping , phase (matter) , alloy , chemical engineering , chemistry , nanotechnology , electrode , metallurgy , selenium , organic chemistry , optoelectronics , engineering
Abstract The search for ion‐conductive solid electrolytes for Li + batteries is an important scientific and technological challenge with economic and sustainable energy implications. In this study, nanocrystals (NCs) of the ion conductor copper selenide (Cu 2−y Se) were doped with Li by the process of cation exchange. Li 2x Cu 2−2x Se alloy NCs were formed at intermediate stages of the reaction, which was followed by phase segregation into Li 2 Se and Cu 2 Se domains. Li‐doped Cu 2−y Se NCs and Li 2 Se NCs exhibit a possible SI phase at moderately elevated temperatures and warrant further ion‐conductance tests. These findings may guide the design of nanostructured super‐ionic electrolytes for Li + transport.