Sulfolane-containing aqueous electrolyte solutions for producing efficient ampere-hour-level zinc metal battery pouch cells

Aqueous zinc metal batteries are appealing candidates for grid energy storage. However, the inadequate electrochemical reversibility of the zinc metal negative electrode inhibits the battery performance at the large-scale cell level. Here, we develop practical ampere-hour-scale aqueous Zn metal batt...

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Vydáno v:Nature communications Ročník 14; číslo 1; s. 1828 - 13
Hlavní autoři: Wang, Yu, Wang, Tairan, Bu, Shuyu, Zhu, Jiaxiong, Wang, Yanbo, Zhang, Rong, Hong, Hu, Zhang, Wenjun, Fan, Jun, Zhi, Chunyi
Médium: Journal Article
Jazyk:angličtina
Vydáno: London Nature Publishing Group UK 01.04.2023
Nature Publishing Group
Nature Portfolio
Témata:
639/301/299
639/301/299/161
639/4077/4079
639/638/161/891
639/638/675
Aqueous electrolytes
Electrochemistry
Electrodes
Electrolytes
Electrolytic cells
Energy storage
Humanities and Social Sciences
Hydrogen evolution
Life span
Metals
Micelles
multidisciplinary
Multilayers
Protons
Reverse micelles
Science
Science (multidisciplinary)
Sulfolane
Zinc
ISSN:2041-1723, 2041-1723
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Shrnutí:Aqueous zinc metal batteries are appealing candidates for grid energy storage. However, the inadequate electrochemical reversibility of the zinc metal negative electrode inhibits the battery performance at the large-scale cell level. Here, we develop practical ampere-hour-scale aqueous Zn metal battery pouch cells by engineering the electrolyte solution. After identifying the proton reduction as the primary source of H 2 evolution during Zn metal electrodeposition, we design an electrolyte solution containing reverse micelle structures where sulfolane molecules constrain water in nanodomains to hinder proton reduction. Furthermore, we develop and validate an electrochemical testing protocol to comprehensively evaluate the cell’s coulombic efficiency and zinc metal electrode cycle life. Finally, using the reverse micelle electrolyte, we assemble and test a practical ampere-hour Zn||Zn 0.25 V 2 O 5 •nH 2 O multi-layer pouch cell capable of delivering an initial energy density of 70 Wh L −1 (based on the volume of the cell components), capacity retention of about 80% after 390 cycles at 56 mA g −1 cathode and ~25 °C and prolonged cycling for 5 months at 56 mA g −1 cathode and ~25 °C. The negative electrode reversibility limits the lifespan of Zn metal batteries. Here, authors report an aqueous electrolyte with a reverse micelle structure that improves the reversibility of the Zn metal anode enabling the production of an ampere-hour-level pouch cell with five months lifetime.
Bibliografie:ObjectType-Article-1
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-37524-7