Multivalent ion storage towards high-performance aqueous zinc-ion hybrid supercapacitors

Ma, X; Cheng, J; Dong, L; Liu, W; Mou, J; Zhao, L; Wang, J; Ren, D; Wu, J; Xu, C; Kang, F

Multivalent ion storage towards high-performance aqueous zinc-ion hybrid supercapacitors

Ma, X Cheng, J Dong, L

Liu, W Mou, J Zhao, L Wang, J Ren, D Wu, J Xu, C Kang, F

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Energy Storage Materials, 2019, 20, pp. 335-342
Issue Date:: 2019

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Field	Value	Language
dc.contributor.author	Ma, X
dc.contributor.author	Cheng, J
dc.contributor.author	Dong, L https://orcid.org/0000-0002-1787-8595
dc.contributor.author	Liu, W
dc.contributor.author	Mou, J
dc.contributor.author	Zhao, L
dc.contributor.author	Wang, J
dc.contributor.author	Ren, D
dc.contributor.author	Wu, J
dc.contributor.author	Xu, C
dc.contributor.author	Kang, F
dc.date.accessioned	2020-05-01T02:12:50Z
dc.date.available	2020-05-01T02:12:50Z
dc.date.issued	2019
dc.identifier.citation	Energy Storage Materials, 2019, 20, pp. 335-342
dc.identifier.issn	2405-8289
dc.identifier.issn	2405-8297
dc.identifier.uri	http://hdl.handle.net/10453/140384
dc.description.abstract	© 2018 Multivalent ion storage mechanism is applied to construct high-performance aqueous zinc-ion hybrid supercapacitors (ZHSs). The constructed MnO2 nanorods//activated carbon (AC) ZHSs with ZnSO4 aqueous electrolyte are significantly different from the common MnO2//AC asymmetric supercapacitors with Na2SO4 electrolyte in electrochemical behaviors and energy storage mechanism. The ZHSs show the maximum specific capacity of 54.1 mA h g−1 and maximum energy density of 34.8 W h kg−1 at the optimal mass ratio of AC to MnO2. The ZHSs are capable of being charged/discharged rapidly within only 2–17 s, delivering a large power of 3.3–13.0 kW kg−1. Reversible insertion/extraction of Zn2+ into/from MnO2 nanorods and ion adsorption/desorption on AC particle surface, as well as partially reversible formation/dissolution of Zn4(OH)6SO4·nH2O participates on both electrodes, are established as the energy storage mechanism of the ZHSs. Electrochemical performance of the ZHSs can be further optimized through electrolyte composition regulation. Addition of Mn2+ cations into ZnSO4 electrolyte leads to significantly enhanced energy density (58.6 W h kg−1) of the ZHSs, while anion replacement of SO42- by CF3SO3- suppresses manganese dissolution and Zn4(OH)6SO4·nH2O formation, thus resulting in good cycling stability with 93.4% capacity retention over 5000 charge/discharge cycles. Overall, the ZHSs based on multivalent ion storage are promising to be applied as high-performance, extremely safe and eco-friendly energy storage devices for wearable/portable electronics and hybrid electric vehicles.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Energy Storage Materials
dc.relation.isbasedon	10.1016/j.ensm.2018.10.020
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0904 Chemical Engineering, 0906 Electrical and Electronic Engineering
dc.title	Multivalent ion storage towards high-performance aqueous zinc-ion hybrid supercapacitors
dc.type	Journal Article
utslib.citation.volume	20
utslib.for	0904 Chemical Engineering
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-05-01T02:12:46Z
pubs.publication-status	Accepted
pubs.volume	20
utslib.start-page	335

Abstract:

© 2018 Multivalent ion storage mechanism is applied to construct high-performance aqueous zinc-ion hybrid supercapacitors (ZHSs). The constructed MnO2 nanorods//activated carbon (AC) ZHSs with ZnSO4 aqueous electrolyte are significantly different from the common MnO2//AC asymmetric supercapacitors with Na2SO4 electrolyte in electrochemical behaviors and energy storage mechanism. The ZHSs show the maximum specific capacity of 54.1 mA h g−1 and maximum energy density of 34.8 W h kg−1 at the optimal mass ratio of AC to MnO2. The ZHSs are capable of being charged/discharged rapidly within only 2–17 s, delivering a large power of 3.3–13.0 kW kg−1. Reversible insertion/extraction of Zn2+ into/from MnO2 nanorods and ion adsorption/desorption on AC particle surface, as well as partially reversible formation/dissolution of Zn4(OH)6SO4·nH2O participates on both electrodes, are established as the energy storage mechanism of the ZHSs. Electrochemical performance of the ZHSs can be further optimized through electrolyte composition regulation. Addition of Mn2+ cations into ZnSO4 electrolyte leads to significantly enhanced energy density (58.6 W h kg−1) of the ZHSs, while anion replacement of SO42- by CF3SO3- suppresses manganese dissolution and Zn4(OH)6SO4·nH2O formation, thus resulting in good cycling stability with 93.4% capacity retention over 5000 charge/discharge cycles. Overall, the ZHSs based on multivalent ion storage are promising to be applied as high-performance, extremely safe and eco-friendly energy storage devices for wearable/portable electronics and hybrid electric vehicles.

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http://hdl.handle.net/10453/140384