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2D SnSe nanonetworks; growth and evaluation for Li-ion battery applications

2D SnSe nanonetworks; growth and evaluation for Li-ion battery applications
2D SnSe nanonetworks; growth and evaluation for Li-ion battery applications
Two-dimensional (2D) layered materials are a quickly evolving area of scientific exploration, with engineering of these into further constrained dimensions and engineered architectures offering the possibility of unique physical insights. Constructing nanomaterials in dimensionally-constrained 2D network architectures is a viable way for the improvement of both the performance and endurance of electronic and energy devices. Here we report the growth of complex 2D nanonetworks of crystalline tin selenide (SnSe) via liquid injection chemical vapour deposition using a single source diselenoether precursor. Potential applications of SnSe span a wide range of technological areas, particularly in energy devices, presenting a strong driving force for research on this material. These networks are composed of high surface area interconnected junctions of one dimensional (1D) nanowires in a 2D plane; such complex SnSe nanonetwork structures have not previously been reported. The SnSe networks possessed an orthorhombic Pnma 62 crystal structure throughout, with the individual network branches uniformly orientated along the <011> and <01-1> directions. The width of the individual interconnected nanowire branches ranged from 120 – 250 nm, with lengths ranging from 1 to 4 microns. These networks of 1D nanowires have a total 2D thickness in the range of 89 ± 9 nm. A growth mechanism for the formation of these networks is proposed based on the minimisation of high surface energy planes. We also highlight the potential of SnSe nanonetworks as anode material for Li-ion batteries, with galvanostatic testing showing an initial discharge capacity in excess of 1000 mAh g-1, with a 92 % capacity retention after 50 cycles at a specific current of 100 mA g-1.
Nanowire networks, 2D materials, layered materials, chemical vapor deposition, SnSe, Li-Ion battery
2574-0962
Davitt, Fionán
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Stokes, Killian
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Collins, Timothy W.
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Roldan-Gutierrez, Manuel
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Robinson, Fred
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Geaney, Hugh
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Biswas, Subhajit
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Chan, Shery L. Y.
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Ryan, Kevin M
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Reid, Gillian
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Holmes, Justin D.
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Davitt, Fionán
5c1eb290-47d9-46c6-bcd1-8050b55bea55
Stokes, Killian
5b03e157-8091-47ec-8bfd-24b209d6ca39
Collins, Timothy W.
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Roldan-Gutierrez, Manuel
fd8e9fab-c206-4802-8219-2e5fa71a5c45
Robinson, Fred
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Geaney, Hugh
4457c984-5195-44e2-be47-e271bf1605ba
Biswas, Subhajit
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Chan, Shery L. Y.
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Ryan, Kevin M
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Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Holmes, Justin D.
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Davitt, Fionán, Stokes, Killian, Collins, Timothy W., Roldan-Gutierrez, Manuel, Robinson, Fred, Geaney, Hugh, Biswas, Subhajit, Chan, Shery L. Y., Ryan, Kevin M, Reid, Gillian and Holmes, Justin D. (2020) 2D SnSe nanonetworks; growth and evaluation for Li-ion battery applications. ACS Applied Energy Materials.

Record type: Article

Abstract

Two-dimensional (2D) layered materials are a quickly evolving area of scientific exploration, with engineering of these into further constrained dimensions and engineered architectures offering the possibility of unique physical insights. Constructing nanomaterials in dimensionally-constrained 2D network architectures is a viable way for the improvement of both the performance and endurance of electronic and energy devices. Here we report the growth of complex 2D nanonetworks of crystalline tin selenide (SnSe) via liquid injection chemical vapour deposition using a single source diselenoether precursor. Potential applications of SnSe span a wide range of technological areas, particularly in energy devices, presenting a strong driving force for research on this material. These networks are composed of high surface area interconnected junctions of one dimensional (1D) nanowires in a 2D plane; such complex SnSe nanonetwork structures have not previously been reported. The SnSe networks possessed an orthorhombic Pnma 62 crystal structure throughout, with the individual network branches uniformly orientated along the <011> and <01-1> directions. The width of the individual interconnected nanowire branches ranged from 120 – 250 nm, with lengths ranging from 1 to 4 microns. These networks of 1D nanowires have a total 2D thickness in the range of 89 ± 9 nm. A growth mechanism for the formation of these networks is proposed based on the minimisation of high surface energy planes. We also highlight the potential of SnSe nanonetworks as anode material for Li-ion batteries, with galvanostatic testing showing an initial discharge capacity in excess of 1000 mAh g-1, with a 92 % capacity retention after 50 cycles at a specific current of 100 mA g-1.

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ae-2020-00776e.R1_Proof_hi - Accepted Manuscript
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Accepted/In Press date: 11 June 2020
Published date: 11 June 2020
Keywords: Nanowire networks, 2D materials, layered materials, chemical vapor deposition, SnSe, Li-Ion battery

Identifiers

Local EPrints ID: 441732
URI: http://eprints.soton.ac.uk/id/eprint/441732
ISSN: 2574-0962
PURE UUID: 44124f16-62e7-4e81-9008-0c898e6fcfda
ORCID for Gillian Reid: ORCID iD orcid.org/0000-0001-5349-3468

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Date deposited: 25 Jun 2020 16:37
Last modified: 07 Oct 2020 01:36

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Contributors

Author: Fionán Davitt
Author: Killian Stokes
Author: Timothy W. Collins
Author: Manuel Roldan-Gutierrez
Author: Fred Robinson
Author: Hugh Geaney
Author: Subhajit Biswas
Author: Shery L. Y. Chan
Author: Kevin M Ryan
Author: Gillian Reid ORCID iD
Author: Justin D. Holmes

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