Lithiation of Copper Selenide Nanocrystals

Progna Banerjee; Prashant K. Jain

doi:10.1002/anie.201803358

Lithiation of Copper Selenide Nanocrystals

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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−ySe) were doped with Li by the process of cation exchange. Li_2xCu_2−2xSe alloy NCs were formed at intermediate stages of the reaction, which was followed by phase segregation into Li₂Se and Cu₂Se domains. Li-doped Cu_2−ySe NCs and Li₂Se 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.

Original language	English (US)
Pages (from-to)	9315-9319
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	30
DOIs	https://doi.org/10.1002/anie.201803358
State	Published - Jul 20 2018

Keywords

batteries
cation exchange
doping
quantum dot
solid electrolyte

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Online availability

10.1002/anie.201803358

Library availability

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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 (Cu2−ySe) were doped with Li by the process of cation exchange. Li2xCu2−2xSe alloy NCs were formed at intermediate stages of the reaction, which was followed by phase segregation into Li2Se and Cu2Se domains. Li-doped Cu2−ySe NCs and Li2Se 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.",

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author = "Progna Banerjee and Jain, {Prashant K.}",

note = "Funding Information: This research was supported by the National Science Foundation under Grant (NSF CHE-1455011). This work was conducted in part at the Frederick Seitz Materials Research Laboratory. We thank the Moore group for allowing use of their DSC instrument. P.B. performed synthesis and characterization of materials, analysis of results, and co-writing of the manuscript. P.K.J. conceived project, performed analyses and simulations, and co-wrote the manuscript. Publisher Copyright: {\textcopyright} 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Jain, Prashant K.

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AB - 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 (Cu2−ySe) were doped with Li by the process of cation exchange. Li2xCu2−2xSe alloy NCs were formed at intermediate stages of the reaction, which was followed by phase segregation into Li2Se and Cu2Se domains. Li-doped Cu2−ySe NCs and Li2Se 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.

KW - batteries

KW - cation exchange

KW - doping

KW - quantum dot

KW - solid electrolyte

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Lithiation of Copper Selenide Nanocrystals

Abstract

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