Temperature-Adaptive Aqueous Zinc–Iodine Batteries Enabled by Ionic Covalent Organic Framework Modified Separator DOI

Yuyang Wang,

Yiming Qi,

Guijun Bi

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5515 - 5522

Опубликована: Май 27, 2025

Zinc-iodine batteries (ZIBs) face challenges, such as polyiodide shuttling, self-discharge, and temperature sensitivity. To overcome these issues, we developed a separator functionalized with an ionic covalent organic framework (COF@GF), which incorporates pyridine quaternary ammonium active sites. The COF@GF enhances conductivity (13.9 mS cm-1) Zn2+ transference number (0.76), suppresses anode dendrite formation, reduces self-discharge. In situ Raman spectroscopy theoretical calculations show that COF's moderate electronic improves I3-/I5- conversion kinetics adsorption through Lewis acid-base interactions, thus controlling redox chemistry suppressing shuttle effects. COF@GF-modified ZIBs exhibit stable cycling for over 5000 cycles at 20 C perform well across temperatures from -5 to 60 °C. At 0 °C, the battery retains 89.6% of its capacity 10000 cycles, minimal decay rate 0.001% per cycle, showcasing potential COF materials practical aqueous ZIB applications.

Язык: Английский

Zeolite‐Based Solid‐State Electrolyte for Highly Stable Zinc Metal Batteries DOI Open Access
Fulong Li, Zhenye Kang,

Lutong Shan

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 25, 2025

Abstract Solid‐state electrolytes are demonstrated great inhibition effect on cathodic dissolution and anodic side reactions in zinc‐ion batteries. In this work, a novel zeolite‐based solid electrolyte (Zeolite‐Zn) enriched with zinc ions, high ionic conductivity (2.54 mS cm −1 ) Zn 2+ transference number (0.866) is prepared through ion‐exchange strategy. Owing to the anhydrous characteristic, Zeolite‐Zn effectively extends electrochemical window 2.5 V inhibits hydrogen evolution reaction. As for Zn||Zeolite‐Zn||NH 4 O 10 batteries, high‐capacity retention rate of 84.9% can be achieved after 1010 cycles at 0.5 A g . Even temperature 60 °C, NH cathode able maintain reversible capacity 239.2 mAh 110 cycles, which attributed superior structural stability, weak interfacial reaction, low migration barrier, inhibited vanadium electrolyte. addition, as‐fabricated Zn||Zeolite‐Zn||AC@I 2 batteries have also brilliant performances, suggesting its promising potential practical application zinc‐based secondary This study provides mechanistic insights inspiration original design inorganic electrolytes.

Язык: Английский

Процитировано

0
Temperature-Adaptive Aqueous Zinc–Iodine Batteries Enabled by Ionic Covalent Organic Framework Modified Separator DOI

Yuyang Wang,

Yiming Qi,

Guijun Bi

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 5515 - 5522

Опубликована: Май 27, 2025

Zinc-iodine batteries (ZIBs) face challenges, such as polyiodide shuttling, self-discharge, and temperature sensitivity. To overcome these issues, we developed a separator functionalized with an ionic covalent organic framework (COF@GF), which incorporates pyridine quaternary ammonium active sites. The COF@GF enhances conductivity (13.9 mS cm-1) Zn2+ transference number (0.76), suppresses anode dendrite formation, reduces self-discharge. In situ Raman spectroscopy theoretical calculations show that COF's moderate electronic improves I3-/I5- conversion kinetics adsorption through Lewis acid-base interactions, thus controlling redox chemistry suppressing shuttle effects. COF@GF-modified ZIBs exhibit stable cycling for over 5000 cycles at 20 C perform well across temperatures from -5 to 60 °C. At 0 °C, the battery retains 89.6% of its capacity 10000 cycles, minimal decay rate 0.001% per cycle, showcasing potential COF materials practical aqueous ZIB applications.

Язык: Английский

Процитировано

0