Journal Article

PUBDB-2024-01504

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A High‐Energy Tellurium Redox‐Amphoteric Conversion Cathode Chemistry for Aqueous Zinc Batteries

Du, J.Extern* ; Zhao, Y. ; Chu, X.Extern* ; Wang, G.Extern* ; Neumann, C. ; Xu, H.Extern* ; Li, X.Extern*XFEL.EU* ; Löffler, M. ; Lu, Q.Extern* ; Zhang, J. ; Li, D.Extern* ; Zou, J. ; Mikhailova, D.Extern* ; Turchanin, A. ; Feng, X. (Corresponding author)Extern* ; Yu, M. (Corresponding author)Extern*

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/adma.202313621  doi:10.3204/PUBDB-2024-01504

Abstract: Rechargeable aqueous zinc batteries are potential candidates for sustainable energy storage systems at a grid scale, owing to their high safety and low cost. However, the existing cathode chemistries exhibit restricted energy density, which hinders their extensive applications. Here, a tellurium redox-amphoteric conversion cathode chemistry is presented for aqueous zinc batteries, which delivers a specific capacity of 1223.9 mAh gTe$^{−1}$ and a high energy density of 1028.0 Wh kgTe$^{−1}$. A highly concentrated electrolyte (30 mol kg$^{−1}$ ZnCl$_2$) is revealed crucial for initiating the Te redox-amphoteric conversion as it suppresses the H$_2$O reactivity and inhibits undesirable hydrolysis of the Te$^{4+}$ product. By carrying out multiple operando/ex situ characterizations, the reversible six-electron Te$^{2−}$/Te$^0$/Te$^{4+}$ conversion with TeCl$_4$ is identified as the fully charged product and ZnTe as the fully discharged product. This finding not only enriches the conversion-type battery chemistries but also establishes a critical step in exploring redox-amphoteric materials for aqueous zinc batteries and beyond.

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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. DFG project G:(GEPRIS)417590517 - SFB 1415: Chemie der synthetischen zweidimensionalen Materialien (417590517) (417590517)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 25 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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