Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface

Abstract We have developed a proof of concept electrode design to covalently graft poly(methyl methacrylate) brushes directly to silicon thin film electrodes via surface-initiated atom transfer radical polymerization. This polymer layer acts as a stable artificial solid electrolyte interface that en...

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Autores principales:	Brian H. Shen, Gabriel M. Veith, Wyatt E. Tenhaeff
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2e191e4381314bb6bf4d151ec3514dca
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spelling	oai:doaj.org-article:2e191e4381314bb6bf4d151ec3514dca2021-12-02T11:41:15ZSilicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface10.1038/s41598-018-30000-z2045-2322https://doaj.org/article/2e191e4381314bb6bf4d151ec3514dca2018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30000-zhttps://doaj.org/toc/2045-2322Abstract We have developed a proof of concept electrode design to covalently graft poly(methyl methacrylate) brushes directly to silicon thin film electrodes via surface-initiated atom transfer radical polymerization. This polymer layer acts as a stable artificial solid electrolyte interface that enables surface passivation despite large volume changes during cycling. Thin polymer layers (75 nm) improve average first cycle coulombic efficiency from 62.4% in bare silicon electrodes to 76.3%. Average first cycle reversible capacity was improved from 3157 to 3935 mAh g−1, and average irreversible capacity was reduced from 2011 to 1020 mAh g−1. Electrochemical impedance spectroscopy performed on silicon electrodes showed that resistance from solid electrolyte interface formation increased from 79 to 1508 Ω in untreated silicon thin films over 26 cycles, while resistance growth was lower – from 98 to 498 Ω – in silicon films functionalized with PMMA brushes. The lower increase suggests enhanced surface passivation and lower electrolyte degradation. This work provides a pathway to develop artificial solid electrolyte interfaces synthesized under controlled reaction conditions.Brian H. ShenGabriel M. VeithWyatt E. TenhaeffNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Brian H. Shen Gabriel M. Veith Wyatt E. Tenhaeff Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
description	Abstract We have developed a proof of concept electrode design to covalently graft poly(methyl methacrylate) brushes directly to silicon thin film electrodes via surface-initiated atom transfer radical polymerization. This polymer layer acts as a stable artificial solid electrolyte interface that enables surface passivation despite large volume changes during cycling. Thin polymer layers (75 nm) improve average first cycle coulombic efficiency from 62.4% in bare silicon electrodes to 76.3%. Average first cycle reversible capacity was improved from 3157 to 3935 mAh g−1, and average irreversible capacity was reduced from 2011 to 1020 mAh g−1. Electrochemical impedance spectroscopy performed on silicon electrodes showed that resistance from solid electrolyte interface formation increased from 79 to 1508 Ω in untreated silicon thin films over 26 cycles, while resistance growth was lower – from 98 to 498 Ω – in silicon films functionalized with PMMA brushes. The lower increase suggests enhanced surface passivation and lower electrolyte degradation. This work provides a pathway to develop artificial solid electrolyte interfaces synthesized under controlled reaction conditions.
format	article
author	Brian H. Shen Gabriel M. Veith Wyatt E. Tenhaeff
author_facet	Brian H. Shen Gabriel M. Veith Wyatt E. Tenhaeff
author_sort	Brian H. Shen
title	Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
title_short	Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
title_full	Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
title_fullStr	Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
title_full_unstemmed	Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface
title_sort	silicon surface tethered polymer as artificial solid electrolyte interface
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/2e191e4381314bb6bf4d151ec3514dca
work_keys_str_mv	AT brianhshen siliconsurfacetetheredpolymerasartificialsolidelectrolyteinterface AT gabrielmveith siliconsurfacetetheredpolymerasartificialsolidelectrolyteinterface AT wyattetenhaeff siliconsurfacetetheredpolymerasartificialsolidelectrolyteinterface
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Silicon Surface Tethered Polymer as Artificial Solid Electrolyte Interface

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