Enabling I3–/I2 Redox Couple toward High-Voltage Zn-Polyiodide Batteries by the Iodide–π Conjugation Effect DOI

Jiaqi Ke,

Kai Bai,

Zicheng Zhang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Distinct from the conventional I3-/I- redox couple (1.299 V), I3-/I2 (1.552 V) can enhance output voltage and achieve higher energy density, which exhibits great development potential. However, sluggish solid-liquid reaction rate, high conversion barrier, polyiodide solubility in aqueous electrolytes together hinder its development, especially at a low N/P ratio. Herein, we introduce an approach to fast liquid-liquid kinetics lower barrier for valence iodine electrochemistry of I3-/I2, by coupling chemical liquefaction (MPII ionic liquid) chelating catalyst (triazine-based poly(ionic liquid), PIL-tri). The MPII spontaneously react with solid I2 generate liquid MPII3, increasing contact sites accelerating kinetics. Besides, PIL-tri significantly lowers I3- restricts triiodide shuttling distinctive iodide-π (I-π) conjugation electron cloud. Such synergistic effect kinetically thermodynamically ensures couple. Consequently, PIL-tri@GP Zn-polyiodide batteries demonstrate (1.47 long cycling (800 cycles), high-areal-capacity twice that graphite paper (1.2 harsh ratio (1). Meanwhile, they exhibited polarity-switchable characteristic maintained stable cyclability 300 cycles when anode cathode were reversed every 50 cycles.

Language: Английский

Oxalamide-derived ionic polymer/carbon nanotube composites: Highly active heterogeneous catalyst for promoting cycloaddition of carbon dioxide to epoxides DOI Creative Commons

Wenye Zha,

Ying Chen, Hu Wang

et al.

Journal of CO2 Utilization, Journal Year: 2025, Volume and Issue: 92, P. 103026 - 103026

Published: Jan. 22, 2025

Language: Английский

Citations

1
Enabling I3–/I2 Redox Couple toward High-Voltage Zn-Polyiodide Batteries by the Iodide–π Conjugation Effect DOI

Jiaqi Ke,

Kai Bai,

Zicheng Zhang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Distinct from the conventional I3-/I- redox couple (1.299 V), I3-/I2 (1.552 V) can enhance output voltage and achieve higher energy density, which exhibits great development potential. However, sluggish solid-liquid reaction rate, high conversion barrier, polyiodide solubility in aqueous electrolytes together hinder its development, especially at a low N/P ratio. Herein, we introduce an approach to fast liquid-liquid kinetics lower barrier for valence iodine electrochemistry of I3-/I2, by coupling chemical liquefaction (MPII ionic liquid) chelating catalyst (triazine-based poly(ionic liquid), PIL-tri). The MPII spontaneously react with solid I2 generate liquid MPII3, increasing contact sites accelerating kinetics. Besides, PIL-tri significantly lowers I3- restricts triiodide shuttling distinctive iodide-π (I-π) conjugation electron cloud. Such synergistic effect kinetically thermodynamically ensures couple. Consequently, PIL-tri@GP Zn-polyiodide batteries demonstrate (1.47 long cycling (800 cycles), high-areal-capacity twice that graphite paper (1.2 harsh ratio (1). Meanwhile, they exhibited polarity-switchable characteristic maintained stable cyclability 300 cycles when anode cathode were reversed every 50 cycles.

Language: Английский

Citations

0