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

Yuyang Wang,

Yiming Qi,

Guijun Bi

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 5515 - 5522

Published: May 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.

Language: Английский

Ternary Gel Electrolyte Enabling Wide‐Temperature and High‐Rate Performance in Aqueous Zinc‐Ion Batteries DOI

Jinpeng Guan,

Yongbiao Mu,

Xiyan Wei

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Abstract Aqueous zinc‐ion batteries (AZIBs) offer significant potential for grid‐scale energy storage due to their cost‐effectiveness, safety, and eco‐friendliness. However, interfacial instability parasitic reactions under extreme temperatures (−20 60 °C) severely degrade cyclability. To address these limitations, a ternary copolymer gel electrolyte (PAM‐T‐S) is developed through copolymerization of acrylamide (AM) with [2‐(methacryloyloxy)ethyl]dimethyl(3‐sulfopropyl)ammonium betaine (SPE) thymine (Thy), forming multidimensional crosslinked network. Thy immobilizes free water molecules suppress activity, while SPE establishes rapid Zn 2+ transport pathways, boosting ionic conductivity. Synergistically, reconstruct the solvation sheath induce hybrid organic–inorganic solid interphase (SEI) via preferential adsorption decomposition, effectively inhibiting dendrite growth side reactions. Consequently, Zn||Zn symmetric cells PAM‐T‐S achieve long lifespans 3200 h at 1 mA cm −2 /1 mAh 1000 20 , along exceptional wide‐temperature performance (3000 −20 °C 820 °C, ). The Zn||VO 2 full cell retains 87.8% capacity after 2000 cycles 5C, highlighting its high‐rate durability. This multifunctional hydrogel design advances AZIBs toward reliable operation across broad temperature ranges, providing scalable strategy next‐generation systems.

Language: Английский

Citations

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

Yuyang Wang,

Yiming Qi,

Guijun Bi

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 5515 - 5522

Published: May 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.

Language: Английский

Citations

0