Journal Article

PUBDB-2024-01977

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png MnO$_2$ superstructure cathode with boosted zinc ion intercalation for aqueous zinc ion batteries

Zhang, A. (First author) ; Zhang, X. (First author) ; Zhao, H.Extern* ; Ehrenberg, H.Extern* ; Chen, G. ; Saadoune, I. ; Fu, Q. (Corresponding author)Extern* ; Wei, Y. (Corresponding author) ; Wang, Y. (Corresponding author)

2024
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jcis.2024.05.052  doi:10.3204/PUBDB-2024-01977

Abstract: The simultaneous intercalation of protons and Zn$^{2+}$ ions in aqueous electrolytes presents a significant obstacle to the widespread adoption of aqueous zinc ion batteries (AZIBs) for large-scale use, a challenge that has yet to be overcome. To address this, we have developed a MnO$_2$/tetramethylammonium (TMA) superstructure with an enlarged interlayer spacing, designed specifically to control H$^+$/Zn$^{2+}$ co-intercalation in AZIBs. Within this superstructure, the pre-intercalated TMA+ ions work as spacers to stabilize the layered structure of MnO$_2$ cathodes and expand the interlayer spacing substantially by 28 % to 0.92 nm. Evidence from in operando pH measurements, in operando synchrotron X-ray diffraction, and X-ray absorption spectroscopy shows that the enlarged interlayer spacing facilitates the diffusion and intercalation of Zn$^{2+}$ ions (which have a large ionic radius) into the MnO$_2$ cathodes. This spacing also helps suppress the competing H$^{+}$ intercalation and the formation of detrimental Zn$_4$(OH)$_6$SO$_4$·5H$_2$O, thereby enhancing the structural stability of MnO$_2$. As a result, enhanced Zn$^{2+}$ storage properties, including excellent capacity and long cycle stability, are achieved.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20211296 (I-20211296) (I-20211296)
3. FS-Proposal: I-20211294 (I-20211294) (I-20211294)
4. DFG project 390874152 - EXC 2154: POLiS - Post Lithium Storage Cluster of Excellence (390874152) (390874152)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)
2. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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