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SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries

Shivam Trivedi, Sirshendu Dinda, Yushu Tang, Stefan Fuchs, Venkat Pamidi, Helge S. Stein, Anji Munnangi Orcid Logo, Maximilian Fichtner

Journal of Energy Storage, Volume: 73, Start page: 109210

Swansea University Author: Anji Munnangi Orcid Logo

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DOI (Published version): 10.1016/j.est.2023.109210

Abstract

Inorganic aqueous binders (IAB) are an emerging class of aqueous binders. They offer exceptional physicochemical properties like intrinsic ionic conductivity, high thermal stability (>1000 °C), and environmental benignity making them attractive. In a previous study, we found that graphite anode s...

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Published in: Journal of Energy Storage
ISSN: 2352-152X
Published: Elsevier BV 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa64707
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In a previous study, we found that graphite anode shows improved electrochemical performance with these binders as compared to conventional PVDF binder for lithium-ion batteries (LIB). However, the cyclic performance of graphite-IAB at a higher rate (e.g., 1C) showed a declining trend. We attributed it to the poor binding strength between graphite and IAB due to insufficient functional groups in graphite. Therefore, in this report SiOx-based surface coatings of graphite are employed to improve its rate capability with silicate-based IAB by providing functional silicon oxide polymorphs on the coated graphite as an intermediate layer. The nature and structural arrangement of these coatings are investigated by tip-enhanced Raman spectroscopy (TERS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Optimized SiOx-coated graphite (GS) with sodium metasilicate binder leads to excellent cyclic stability with a capacity retention of &gt;90 % at 20C for &gt;4000 cycles. A high specific capacity of &gt;315 mAhg−1 at 2C, stable for over 1000 cycles, is achieved for GS with IAB. The improved performance of the coated graphite is attributed to ameliorated binding with IAB as well as stable solid electrolyte interphase. 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spelling v2 64707 2023-10-11 SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2023-10-11 MTLS Inorganic aqueous binders (IAB) are an emerging class of aqueous binders. They offer exceptional physicochemical properties like intrinsic ionic conductivity, high thermal stability (>1000 °C), and environmental benignity making them attractive. In a previous study, we found that graphite anode shows improved electrochemical performance with these binders as compared to conventional PVDF binder for lithium-ion batteries (LIB). However, the cyclic performance of graphite-IAB at a higher rate (e.g., 1C) showed a declining trend. We attributed it to the poor binding strength between graphite and IAB due to insufficient functional groups in graphite. Therefore, in this report SiOx-based surface coatings of graphite are employed to improve its rate capability with silicate-based IAB by providing functional silicon oxide polymorphs on the coated graphite as an intermediate layer. The nature and structural arrangement of these coatings are investigated by tip-enhanced Raman spectroscopy (TERS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Optimized SiOx-coated graphite (GS) with sodium metasilicate binder leads to excellent cyclic stability with a capacity retention of >90 % at 20C for >4000 cycles. A high specific capacity of >315 mAhg−1 at 2C, stable for over 1000 cycles, is achieved for GS with IAB. The improved performance of the coated graphite is attributed to ameliorated binding with IAB as well as stable solid electrolyte interphase. We propose inorganic aqueous binders in combination with SiOx-coated graphite as an approach to realize a stable anode for LIB. Journal Article Journal of Energy Storage 73 109210 Elsevier BV 2352-152X Lithium-ion batteries, Aqueous binders, Inorganic binders, Graphite coatings 15 12 2023 2023-12-15 10.1016/j.est.2023.109210 http://dx.doi.org/10.1016/j.est.2023.109210 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University This work contributes to the research performed at CELEST (Center for Electrochemical Energy Storage Ulm-Karlsruhe) and was funded by the German Research Foundation (DFG) under project ID 390874152 (POLiS Cluster of Excellence, EXC 2154). 2023-11-08T12:33:26.7596160 2023-10-11T09:14:44.7496301 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Shivam Trivedi 1 Sirshendu Dinda 2 Yushu Tang 3 Stefan Fuchs 4 Venkat Pamidi 5 Helge S. Stein 6 Anji Munnangi 0000-0001-9101-0252 7 Maximilian Fichtner 8 64707__28974__501f6065180c43b48b77201b8e04d75b.pdf 64707.VOR.pdf 2023-11-08T12:32:02.9990864 Output 14218344 application/pdf Version of Record true © 2023 The Authors. Published by Elsevier Ltd. Distributed under the terms of a Creative Commons Attribution 4.0 International License (CC BY 4.0). true eng https://creativecommons.org/licenses/by/4.0/
title SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
spellingShingle SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
Anji Munnangi
title_short SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
title_full SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
title_fullStr SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
title_full_unstemmed SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
title_sort SiOx coated graphite with inorganic aqueous binders as high-performance anode for lithium-ion batteries
author_id_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Anji Munnangi
author2 Shivam Trivedi
Sirshendu Dinda
Yushu Tang
Stefan Fuchs
Venkat Pamidi
Helge S. Stein
Anji Munnangi
Maximilian Fichtner
format Journal article
container_title Journal of Energy Storage
container_volume 73
container_start_page 109210
publishDate 2023
institution Swansea University
issn 2352-152X
doi_str_mv 10.1016/j.est.2023.109210
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
url http://dx.doi.org/10.1016/j.est.2023.109210
document_store_str 1
active_str 0
description Inorganic aqueous binders (IAB) are an emerging class of aqueous binders. They offer exceptional physicochemical properties like intrinsic ionic conductivity, high thermal stability (>1000 °C), and environmental benignity making them attractive. In a previous study, we found that graphite anode shows improved electrochemical performance with these binders as compared to conventional PVDF binder for lithium-ion batteries (LIB). However, the cyclic performance of graphite-IAB at a higher rate (e.g., 1C) showed a declining trend. We attributed it to the poor binding strength between graphite and IAB due to insufficient functional groups in graphite. Therefore, in this report SiOx-based surface coatings of graphite are employed to improve its rate capability with silicate-based IAB by providing functional silicon oxide polymorphs on the coated graphite as an intermediate layer. The nature and structural arrangement of these coatings are investigated by tip-enhanced Raman spectroscopy (TERS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Optimized SiOx-coated graphite (GS) with sodium metasilicate binder leads to excellent cyclic stability with a capacity retention of >90 % at 20C for >4000 cycles. A high specific capacity of >315 mAhg−1 at 2C, stable for over 1000 cycles, is achieved for GS with IAB. The improved performance of the coated graphite is attributed to ameliorated binding with IAB as well as stable solid electrolyte interphase. We propose inorganic aqueous binders in combination with SiOx-coated graphite as an approach to realize a stable anode for LIB.
published_date 2023-12-15T12:33:30Z
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score 11.016235

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