Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage

Sodium ion batteries (SIBs) are promising alternatives to lithium ion batteries with advantages of cost effectiveness. Metal sulfides as emerging SIB anodes have relatively high electronic conductivity and high theoretical capacity, however, large volume change during electrochemical testing often l...

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Main Authors: Chen, Jingwei, Mohrhusen, Lars, Ali, Ghulam, Li, Shaohui, Chung, Kyung Yoon, Al-Shamery, Katharina, Lee, Pooi See
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/146985
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1469852021-03-16T06:09:15Z Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage Chen, Jingwei Mohrhusen, Lars Ali, Ghulam Li, Shaohui Chung, Kyung Yoon Al-Shamery, Katharina Lee, Pooi See School of Materials Science and Engineering Singapore-HUJ Alliance for Research and Enterprise Campus for Research Excellence and Technological Enterprise Engineering::Materials Bimetallic Sulfides In Situ X-ray Absorption Spectroscopy Sodium ion batteries (SIBs) are promising alternatives to lithium ion batteries with advantages of cost effectiveness. Metal sulfides as emerging SIB anodes have relatively high electronic conductivity and high theoretical capacity, however, large volume change during electrochemical testing often leads to unsatisfactory electrochemical performance. Herein bimetallic sulfide Cu 2 MoS 4 (CMS) with layered crystal structures are prepared with glucose addition (CMS1), resulting in the formation of hollow nanospheres that endow large interlayer spacing, benefitting the rate performance and cycling stability. The electrochemical mechanisms of CMS1 are investigated using ex situ X-ray photoelectron spectroscopy and in situ X-ray absorption spectroscopy, revealing the conversion-based mechanism in carbonate electrolyte and intercalation-based mechanism in ether-electrolyte, thus allowing fast and reversible Na + storage. With further introduction of reduced graphene oxide (rGO), CMS1–rGO composites are obtained, maintaining the hollow structure of CMS1. CMS1–rGO delivers excellent rate performance (258 mAh g −1 at 50 mA g −1 and 131.9 mAh g −1 at 5000 mA g −1 ) and notably enhanced cycling stability (95.6% after 2000 cycles). A full cell SIB is assembled by coupling CMS1–rGO with Na 3 V 2 (PO 4 ) 3 -based cathode, delivering excellent cycling stability (75.5% after 500 cycles). The excellent rate performance and cycling stability emphasize the advantage of CMS1–rGO toward advanced SIB full cells assembly. National Research Foundation (NRF) This work was financially supported by the National Research Foundation Investigatorship, Award No. NRF-NRFI2016-05 and the Campus for Research Excellence and Technological Enterprise (CREATE), under the National Research Foundation, Prime Minister’s Office, Singapore. The German Science Foundation is acknowledged for the funding of the Themo Fisher XPS device (Grant No. INST 184/144-1FUGG). The XPS measurements were supported by Deutsche Forschungsgemeinschaft (Grant No. INST 184/144-1 FUGG). The DFG research training group GRK 2226 “Chemical Bond Activation” as well as the German Academic Scholarship Foundation (Studienstiftung des deutschen Volkes) are appreciated for financial support. The work done at KIST was supported by the KIST Institutional Program (Project Nos. 2E28142 and 2V05940). 2021-03-16T06:09:15Z 2021-03-16T06:09:15Z 2019 Journal Article Chen, J., Mohrhusen, L., Ali, G., Li, S., Chung, K. Y., Al-Shamery, K. & Lee, P. S. (2019). Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage. Advanced Functional Materials, 29(7), 1807753--. https://dx.doi.org/10.1002/adfm.201807753 1616-301X 0000-0003-1383-1623 https://hdl.handle.net/10356/146985 10.1002/adfm.201807753 2-s2.0-85059350465 7 29 1807753- en NRF‐NRFI2016‐05 Advanced Functional Materials © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Bimetallic Sulfides
In Situ X-ray Absorption Spectroscopy
spellingShingle Engineering::Materials
Bimetallic Sulfides
In Situ X-ray Absorption Spectroscopy
Chen, Jingwei
Mohrhusen, Lars
Ali, Ghulam
Li, Shaohui
Chung, Kyung Yoon
Al-Shamery, Katharina
Lee, Pooi See
Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
description Sodium ion batteries (SIBs) are promising alternatives to lithium ion batteries with advantages of cost effectiveness. Metal sulfides as emerging SIB anodes have relatively high electronic conductivity and high theoretical capacity, however, large volume change during electrochemical testing often leads to unsatisfactory electrochemical performance. Herein bimetallic sulfide Cu 2 MoS 4 (CMS) with layered crystal structures are prepared with glucose addition (CMS1), resulting in the formation of hollow nanospheres that endow large interlayer spacing, benefitting the rate performance and cycling stability. The electrochemical mechanisms of CMS1 are investigated using ex situ X-ray photoelectron spectroscopy and in situ X-ray absorption spectroscopy, revealing the conversion-based mechanism in carbonate electrolyte and intercalation-based mechanism in ether-electrolyte, thus allowing fast and reversible Na + storage. With further introduction of reduced graphene oxide (rGO), CMS1–rGO composites are obtained, maintaining the hollow structure of CMS1. CMS1–rGO delivers excellent rate performance (258 mAh g −1 at 50 mA g −1 and 131.9 mAh g −1 at 5000 mA g −1 ) and notably enhanced cycling stability (95.6% after 2000 cycles). A full cell SIB is assembled by coupling CMS1–rGO with Na 3 V 2 (PO 4 ) 3 -based cathode, delivering excellent cycling stability (75.5% after 500 cycles). The excellent rate performance and cycling stability emphasize the advantage of CMS1–rGO toward advanced SIB full cells assembly.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Chen, Jingwei
Mohrhusen, Lars
Ali, Ghulam
Li, Shaohui
Chung, Kyung Yoon
Al-Shamery, Katharina
Lee, Pooi See
format Article
author Chen, Jingwei
Mohrhusen, Lars
Ali, Ghulam
Li, Shaohui
Chung, Kyung Yoon
Al-Shamery, Katharina
Lee, Pooi See
author_sort Chen, Jingwei
title Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
title_short Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
title_full Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
title_fullStr Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
title_full_unstemmed Electrochemical mechanism investigation of Cu2MoS4 hollow nanospheres for fast and stable sodium Ion storage
title_sort electrochemical mechanism investigation of cu2mos4 hollow nanospheres for fast and stable sodium ion storage
publishDate 2021
url https://hdl.handle.net/10356/146985
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