Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide

Abstract Transition metal sulfides are regarded as a type of high-performance anode materials for lithium ion batteries (LIBs). However, their electrochemical process and lithium-storage mechanism are complicated and remain controversial. This work is intended to give the direct observation on the e...

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Autores principales:	Qingmei Su, Shixin Wang, Miao Feng, Gaohui Du, Bingshe Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/54aa0fe9409a45b4a0befef28ff98fc9
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spelling	oai:doaj.org-article:54aa0fe9409a45b4a0befef28ff98fc92021-12-02T12:32:13ZDirect Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide10.1038/s41598-017-07648-02045-2322https://doaj.org/article/54aa0fe9409a45b4a0befef28ff98fc92017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07648-0https://doaj.org/toc/2045-2322Abstract Transition metal sulfides are regarded as a type of high-performance anode materials for lithium ion batteries (LIBs). However, their electrochemical process and lithium-storage mechanism are complicated and remain controversial. This work is intended to give the direct observation on the electrochemical behavior and find out the lithium-storage mechanism of molybdenum disulfide (MoS2) using in situ transmission electron microscopy (TEM). We find that single-crystalline MoS2 nanosheets convert to Mo nanograins (~2 nm) embedded in Li2S matrix after the first full lithiation. After the delithiation, the Mo nanograins and Li2S transform to a large number of lamellar MoS2 nanocrystals. The discharge-charge cycling of MoS2 in LIBs is found to be a fully reversible conversion between MoS2 and Mo/Li2S rather than the electrochemical conversion between S and Li2S proposed by many researchers. The in situ real-time characterization results give direct evidence and profound insights into the lithium-storage mechanism of MoS2 as anode in LIBs.Qingmei SuShixin WangMiao FengGaohui DuBingshe XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qingmei Su Shixin Wang Miao Feng Gaohui Du Bingshe Xu Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
description	Abstract Transition metal sulfides are regarded as a type of high-performance anode materials for lithium ion batteries (LIBs). However, their electrochemical process and lithium-storage mechanism are complicated and remain controversial. This work is intended to give the direct observation on the electrochemical behavior and find out the lithium-storage mechanism of molybdenum disulfide (MoS2) using in situ transmission electron microscopy (TEM). We find that single-crystalline MoS2 nanosheets convert to Mo nanograins (~2 nm) embedded in Li2S matrix after the first full lithiation. After the delithiation, the Mo nanograins and Li2S transform to a large number of lamellar MoS2 nanocrystals. The discharge-charge cycling of MoS2 in LIBs is found to be a fully reversible conversion between MoS2 and Mo/Li2S rather than the electrochemical conversion between S and Li2S proposed by many researchers. The in situ real-time characterization results give direct evidence and profound insights into the lithium-storage mechanism of MoS2 as anode in LIBs.
format	article
author	Qingmei Su Shixin Wang Miao Feng Gaohui Du Bingshe Xu
author_facet	Qingmei Su Shixin Wang Miao Feng Gaohui Du Bingshe Xu
author_sort	Qingmei Su
title	Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
title_short	Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
title_full	Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
title_fullStr	Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
title_full_unstemmed	Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide
title_sort	direct studies on the lithium-storage mechanism of molybdenum disulfide
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/54aa0fe9409a45b4a0befef28ff98fc9
work_keys_str_mv	AT qingmeisu directstudiesonthelithiumstoragemechanismofmolybdenumdisulfide AT shixinwang directstudiesonthelithiumstoragemechanismofmolybdenumdisulfide AT miaofeng directstudiesonthelithiumstoragemechanismofmolybdenumdisulfide AT gaohuidu directstudiesonthelithiumstoragemechanismofmolybdenumdisulfide AT bingshexu directstudiesonthelithiumstoragemechanismofmolybdenumdisulfide
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Direct Studies on the Lithium-Storage Mechanism of Molybdenum Disulfide

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