A covalent organic framework as a dual-active-center cathode for a high-performance aqueous zinc-ion battery

Li, Hongbao; Cao, Mengge; Fu, Zhenli; Ma, Quanwei; Zhang, Longhai; Wang, Rui; Liang, Fei; Zhou, Tengfei; Zhang, Chaofeng

doi:10.1039/d3sc07013a

Cited by 13 publications

(1 citation statement)

References 53 publications

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“…This implies the presence of a synergistic storage mechanism involving both protons and zinc ions. 37,44 To further delve into the impact of protons on reversible capacity, we extended our investigation to organic electrolytes containing only Zn 2+ (0.5 M Zn(OTF) 2 in DMF, a well-known aprotic solvent) and compared it with aqueous electrolytes containing 0.5 M Zn(OTF) 2 or 0.5 M ZnSO 4 (Fig. S22 ESI †).…”

Section: Esi †) Electrochemical Impedance Spectroscopy (Eis) and Cycl...mentioning

confidence: 99%

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Xu,

Li,

Zhang

et al. 2024

J. Mater. Chem. A

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Section: Esi †) Electrochemical Impedance Spectroscopy (Eis) and Cycl...mentioning

confidence: 99%

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Xu,

Li,

Zhang

et al. 2024

J. Mater. Chem. A

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Ultrastable Electrolytic Zn–I₂ Batteries Based on Nanocarbon Wrapped by Highly Efficient Single‐Atom Fe‐NC Iodine Catalysts

Wang,

Jin,

Xiong

et al. 2024

Advanced Materials

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Aqueous Zn‐iodine (Zn‐I2) conversion batteries with iodine redox chemistry suffers the severe polyiodide shuttling and sluggish redox kinetics, which impede the battery lifespan and rate capability. Herein, we introduce an ultrastable Zn‐I2 battery based on single‐atom Fe‐N‐C encapsulated high‐surface‐area carbon (HC@FeNC) as the core‐shell cathode materials, which accelerate the I−/I3−/I° conversion significantly. The robust chemical‐physical interaction between polyiodides and Fe‐N4 sites tightly binds the polyiodide ions and suppresses the polyiodide shuttling, thereby significantly enhancing the coulombic efficiency. As a result, the core‐shell HC@FeNC cathode endows the electrolytic Zn–I2 battery with an excellent capacity, remarkable rate capability, and an ultra‐long lifespan over 60000 cycles. More importantly, a practical 253 Wh kg−1 pouch cell shows good capacity retention of 84% after 100 cycles, underscoring its considerable potential for commercial Zn‐I2 batteries.This article is protected by copyright. All rights reserved

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Eutectic Network Synergy Interface Modification Strategy to Realize High‐Performance Zn‐I₂ Batteries

Wang,

Liu,

Wan

et al. 2024

Advanced Energy Materials

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Zn‐I2 batteries suffer from uncontrollable shuttle effects of polyiodine ions (I3− and I5−) at the cathode/electrolyte interface and side reactions induced by reactive H2O at the anode/electrolyte interface. In this study, a hydrated eutectic electrolyte is designed that synergizes the eutectic network and functional interfacial adsorbed layer to develop high‐performance Zn‐I2 batteries. The eutectic network can restrain active H2O molecules in the electrolyte to inhibit the side reaction at the anode/electrolyte interface and shuttle effect at the cathode/electrolyte interface. Additionally, the functional interfacial adsorbed layer guides the nucleation behavior of Zn2+ to inhibit the growth of dendrites and also separates the zinc anode from direct contact with active H2O molecules and polyiodine ions to inhibit corrosion. Theoretical calculation, in situ Ultraviolet–visible spectroscopy (UV‐vis) and Raman characterizations, and visualization experiments demonstrate that the hydrated eutectic electrolyte effectively inhibits the shuttling effect and improves the reversibility of zinc deposition/stripping behavior. Consequently, the Zn‐I2 battery can maintain a capacity of 133 mAh g−1 after 5000 cycles at 5 C. This highly efficient synergistic strategy offers a practical approach to the development of advanced Zn‐I2 batteries.

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A covalent organic framework as a dual-active-center cathode for a high-performance aqueous zinc-ion battery

Abstract: Organic electrode materials have shown significant potential for aqueous Zn ion batteries (AZIBs) due to their flexible structure designability and cost advantage. However, sluggish ionic diffusion, high solubility, and low...

Cited by 13 publications

References 53 publications

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Ultrastable Electrolytic Zn–I₂ Batteries Based on Nanocarbon Wrapped by Highly Efficient Single‐Atom Fe‐NC Iodine Catalysts

Eutectic Network Synergy Interface Modification Strategy to Realize High‐Performance Zn‐I₂ Batteries

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A covalent organic framework as a dual-active-center cathode for a high-performance aqueous zinc-ion battery

Abstract: Organic electrode materials have shown significant potential for aqueous Zn ion batteries (AZIBs) due to their flexible structure designability and cost advantage. However, sluggish ionic diffusion, high solubility, and low...

Cited by 13 publications

References 53 publications

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Compact aqueous zinc–carbon capacitors with high capacity and ultra-long lifespan

Ultrastable Electrolytic Zn–I2 Batteries Based on Nanocarbon Wrapped by Highly Efficient Single‐Atom Fe‐NC Iodine Catalysts

Eutectic Network Synergy Interface Modification Strategy to Realize High‐Performance Zn‐I2 Batteries

Contact Info

Product

Resources

About

Ultrastable Electrolytic Zn–I₂ Batteries Based on Nanocarbon Wrapped by Highly Efficient Single‐Atom Fe‐NC Iodine Catalysts

Eutectic Network Synergy Interface Modification Strategy to Realize High‐Performance Zn‐I₂ Batteries