Practical four-electron zinc-iodine aqueous batteries enabled by orbital hybridization induced adsorption-catalysis

Liu, Tingting; Lei, Chengjun; Wang, Huijian; Xu, Chen; Ma, Wenjiao; He, Xin; Liang, Xiao

doi:10.1016/j.scib.2024.02.014

Cited by 14 publications

(4 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3c). 5,21 Such an energetic difference aligns with the longest equilibrium average intermolecular bond length of the iodine species in the different electrolytes (Fig. 3d and Fig.…”

supporting

confidence: 72%

“…3b). 5,20 The energy barrier for hydrolysis in HE 2–18 is calculated to be 5.71 eV, which is 2.84 eV higher than that in the 2 M ZC electrolyte, indicative of the suppressed hydrolysis trend in the hybrid electrolyte.…”

mentioning

confidence: 98%

“…2 M ZnSO 4 ) triggers serious side effects on the anode and cathode. These include the hydrolysis of positively charged I + species through nucleophilic attack by the water molecules 3–5 and severe hydrogen evolution side reactions and uncontrollable zinc corrosion at the electrolyte/anode interface. 6,7 These challenges of conventional aqueous electrolytes lead to low Coulombic efficiency, voltage decay and poor cycling performance of the 4eZIBs.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Triflate anion chemistry for enhanced four-electron zinc–iodine aqueous batteries

Liu,

Lei,

Wang

et al. 2024

Chem. Commun.

Self Cite

View full text Add to dashboard Cite

show abstract

“…3c). 5,21 Such an energetic difference aligns with the longest equilibrium average intermolecular bond length of the iodine species in the different electrolytes (Fig. 3d and Fig.…”

supporting

confidence: 72%

mentioning

confidence: 98%

mentioning

confidence: 99%

See 1 more Smart Citation

Triflate anion chemistry for enhanced four-electron zinc–iodine aqueous batteries

Liu,

Lei,

Wang

et al. 2024

Chem. Commun.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to enhance the lowtemperature performance of 4eZIBs, we propose the utilization of a recently established iron single atom supported on nitrogen doped-carbon (FeSA-NC) as the iodine host, known for its catalytic ability in iodine conversion and improved ICl stability. [35,36] Evidently, although the FeSA-NC/I 2 electrode does exhibit an increase in polarization when the cell is cooled in the 7-3 hybrid electrolyte (Figure S28, Supporting Information), the voltage gap between the reduction and oxidation peak voltage is significantly smaller than that of the PAC/I 2 electrode containing the same iodine content (Figure 6b). At room temperature, the 4eZIB with FeSA-NC electrode also exhibits higher peak current and lower polarization than that of the PAC/I 2 electrode, indicating improved iodine redox kinetics and iodine utilization (Figure S29, Supporting Information).…”

Section: The Four-electron Zn-i 2 Batteries In a Wide Temperature Rangementioning

confidence: 98%

Aqueous Electrolyte With Weak Hydrogen Bonds for Four‐Electron Zinc–Iodine Battery Operates in a Wide Temperature Range

Liu,

Lei,

Wang

et al. 2024

Advanced Materials

Self Cite

View full text Add to dashboard Cite

In the pursuit of high‐performance energy storage systems, four‐electron zinc–iodine aqueous batteries (4eZIBs) with successive I−/I2/I+ redox couples are appealing for their potential to deliver high energy density and resource abundance. However, the susceptibility of positive valence I+ to hydrolysis and the instability of Zn plating/stripping in conventional aqueous electrolyte pose significant challenges. In response, we introduce polyethylene glycol (PEG 200) as a co‐solvent in 2 m ZnCl2 aqueous solution to design a wide temperature electrolyte. Through a comprehensive investigation combining spectroscopic characterizations and theoretical simulations, we elucidate that PEG disrupts the intrinsic strong H‐bonds of water by global weak PEG‐H2O interaction, which strengthens the O−H covalent bond of water and intensifies the coordination with Zn2+. This synergistic effect substantially reduces water activity to restrain the I+ hydrolysis, facilitating I−/I2/I+ redox kinetics, mitigating I3− formation, and smoothening Zn deposition. The 4eZIBs in the optimized hybrid electrolyte not only deliver superior cyclability with a low fading rate of 0.0009% per cycle over 20000 cycles and a close‐to‐unit coulombic efficiency, but also exhibit stable performance in a wide temperature range from 40 °C to −40 °C. This study offers valuable insights into the rational design of electrolytes for 4eZIBs.This article is protected by copyright. All rights reserved

show abstract

Confining Iodine into Metal‐Organic Framework Derived Metal‐Nitrogen‐Carbon for Long‐Life Aqueous Zinc‐Iodine Batteries

Guo,

Xu,

Tang

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

Aqueous zinc–iodine batteries (AZIBs) are highly appealing for energy requirements owing to their safety, cost‐effectiveness, and scalability. However, the inadequate redox kinetics and severe shuttling effect of polyiodide ions impede their commercial viability. Herein, several Zn‐MOF‐derived porous carbon materials are designed, and the further preparation of iron–doped porous carbon (Fe–N–C, M9) with varied Fe doping contents is optimized based on a facile self‐assembly/carbonization approach. M9, with atomic Fe coordinated to nitrogen atoms, is employed as an efficient cathode host for AZIBs. Functional modifications of porous carbon hosts involving the doping species and levels are investigated. The adsorption tests, in situ Raman spectroscopy, and in situ UV–vis results demonstrate the adsorption capability and charge‐discharge mechanism for the iodine species. Furthermore, experimental findings and theoretical analyses have proven that the redox conversion of iodine is enhanced through a physicochemical confinement effect. This study offers basic principles for the strategic design of single‐atom dispersed carbon as an iodine host for high‐performance AZIBs. Flexible soft–pack battery and wearable microbattery applications also have implications for future long‐life aqueous battery designs.

show abstract

Practical four-electron zinc-iodine aqueous batteries enabled by orbital hybridization induced adsorption-catalysis

Cited by 14 publications

References 52 publications

Triflate anion chemistry for enhanced four-electron zinc–iodine aqueous batteries

Triflate anion chemistry for enhanced four-electron zinc–iodine aqueous batteries

Aqueous Electrolyte With Weak Hydrogen Bonds for Four‐Electron Zinc–Iodine Battery Operates in a Wide Temperature Range

Confining Iodine into Metal‐Organic Framework Derived Metal‐Nitrogen‐Carbon for Long‐Life Aqueous Zinc‐Iodine Batteries

Contact Info

Product

Resources

About