Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM

Abstract Li-ion batteries function by Li intercalating into and through the layered electrode materials. Intercalation is a solid-state interaction resulting in the formation of new phases. The new observations presented here reveal that at the nanoscale the intercalation mechanism is fundamentally...

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Autores principales:	Chanchal Ghosh, Manish Kumar Singh, Shayani Parida, Matthew T. Janish, Arthur Dobley, Avinash M. Dongare, C. Barry Carter
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/206b7565ab084791a11524279592b053
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spelling	oai:doaj.org-article:206b7565ab084791a11524279592b0532021-12-02T14:53:43ZPhase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM10.1038/s41598-021-88395-12045-2322https://doaj.org/article/206b7565ab084791a11524279592b0532021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88395-1https://doaj.org/toc/2045-2322Abstract Li-ion batteries function by Li intercalating into and through the layered electrode materials. Intercalation is a solid-state interaction resulting in the formation of new phases. The new observations presented here reveal that at the nanoscale the intercalation mechanism is fundamentally different from the existing models and is actually driven by nonuniform phase distributions rather than the localized Li concentration: the lithiation process is a ‘distribution-dependent’ phenomena. Direct structure imaging of 2H and 1T dual-phase microstructures in lithiated MoS2 and WS2 along with the localized chemical segregation has been demonstrated in the current study. Li, a perennial challenge for the TEM, is detected and imaged using a low-dose, direct-electron detection camera on an aberration-corrected TEM and confirmed by image simulation. This study shows the presence of fully lithiated nanoscale domains of 2D host matrix in the vicinity of Li-lean regions. This confirms the nanoscale phase formation followed by Oswald ripening, where the less-stable smaller domains dissolves at the expense of the larger and more stable phases.Chanchal GhoshManish Kumar SinghShayani ParidaMatthew T. JanishArthur DobleyAvinash M. DongareC. Barry CarterNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chanchal Ghosh Manish Kumar Singh Shayani Parida Matthew T. Janish Arthur Dobley Avinash M. Dongare C. Barry Carter Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
description	Abstract Li-ion batteries function by Li intercalating into and through the layered electrode materials. Intercalation is a solid-state interaction resulting in the formation of new phases. The new observations presented here reveal that at the nanoscale the intercalation mechanism is fundamentally different from the existing models and is actually driven by nonuniform phase distributions rather than the localized Li concentration: the lithiation process is a ‘distribution-dependent’ phenomena. Direct structure imaging of 2H and 1T dual-phase microstructures in lithiated MoS2 and WS2 along with the localized chemical segregation has been demonstrated in the current study. Li, a perennial challenge for the TEM, is detected and imaged using a low-dose, direct-electron detection camera on an aberration-corrected TEM and confirmed by image simulation. This study shows the presence of fully lithiated nanoscale domains of 2D host matrix in the vicinity of Li-lean regions. This confirms the nanoscale phase formation followed by Oswald ripening, where the less-stable smaller domains dissolves at the expense of the larger and more stable phases.
format	article
author	Chanchal Ghosh Manish Kumar Singh Shayani Parida Matthew T. Janish Arthur Dobley Avinash M. Dongare C. Barry Carter
author_facet	Chanchal Ghosh Manish Kumar Singh Shayani Parida Matthew T. Janish Arthur Dobley Avinash M. Dongare C. Barry Carter
author_sort	Chanchal Ghosh
title	Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
title_short	Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
title_full	Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
title_fullStr	Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
title_full_unstemmed	Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
title_sort	phase evolution and structural modulation during in situ lithiation of mos2, ws2 and graphite in tem
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/206b7565ab084791a11524279592b053
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Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM

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