Developing zeolitic imidazolate frameworks 67-derived fluorides using 2-methylimidazole and ammonia fluoride for energy storage and electrocatalysis

Lee, Pin‐Yan; Lin, Lu‐Yin

doi:10.1016/j.energy.2021.122129

Cited by 46 publications

(6 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NF was washed according to the previous study. 40,41 After solution synthesis, the as-obtained binder-free ZIF-67 electrode was washed with MeOH many times and dried at 60 1C.…”

Section: Fabrication Of Oxidized Zif-67 Electrodes On Nickel Foam And...mentioning

confidence: 99%

Efficient binder-free electrode with a derivative synthesis of a four-leaf clover cobalt oxide from a metal organic framework on nickel foam as an energy storage device

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…The NF was washed according to the previous study. 40,41 After solution synthesis, the as-obtained binder-free ZIF-67 electrode was washed with MeOH many times and dried at 60 1C.…”

Section: Fabrication Of Oxidized Zif-67 Electrodes On Nickel Foam And...mentioning

confidence: 99%

Efficient binder-free electrode with a derivative synthesis of a four-leaf clover cobalt oxide from a metal organic framework on nickel foam as an energy storage device

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Synthesis of Control Samples: As a control, Ni x Co y F 2 -L and c-Ni-MeIM was prepared refer to the approach reported in the literature. [19,23] The synthesis of c-Ni-MeIM-Co-0.01 was similar to that of a-Ni-MeIM-Co-0.01, except that a-Ni-MeIM was replaced by c-Ni-MeIM. NiF 2 , CoF 2, and c-Ni-MeIM-Co-F-G were synthesized in basically the same way as Ni x Co y F 2 -G, with the difference that a-Ni-MeIM-Co-𝛼 was replaced by a-Ni-MeIM, ZIF-67 and c-Ni-MeIM-Co-0.01, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…From XRD pattern, no obvious fluoride peak can be found, indicating that liquid phase fluorination is more difficult than gas phase fluorination method, proving that the vapor phase fluorination method exhibits significant advantage compared to traditional liquid phase synthesis methods (Figure S15, Supporting Information). [23] The difficulty of aqueous fluorination is originated from the higher ligand field strength of H 2 O or OH − than that of F − .…”

Section: Electrochemical Test Of Ni 042 Co 058 F 2 -G and Comparison ...mentioning

confidence: 99%

Surface Reconstruction Facilitated by Fluorine Migration and Bimetallic Center in NiCo Bimetallic Fluoride Toward Oxygen Evolution Reaction

Xu,

Zuo,

et al. 2023

Advanced Science

View full text Add to dashboard Cite

Oxygen evolution reaction (OER) is a critical anodic reaction of electrochemical water splitting, developing a high‐efficiency electrocatalyst is essential. Transition metal‐based catalysts are much more cost‐effective if comparable activities can be achieved. Among them, fluorides are rarely reported due to their low aqueous stability of coordination and low electric conductivity. Herein, a NiCo bimetallic fluoride with good crystallinity is designed and constructed, and significantly enhanced catalytic activity and conductivity are observed. The inevitable oxidation of transition metal ions at high potential and the dissociation of F− are attributed to the low aqueous stability of coordination. The theoretical researches predicte that transition metal fluorides should have a strong tendency to electrochemical reconstruction. Therefore, based on the observations on their electrochemical behavior, high‐resolution transmission electron microscopy, X‐ray photoelectron spectroscopy, and bode plots, it is further demonstrated that surface reconstruction occurred during the electrochemical process, meanwhile a significant increase of electrochemically active area, which is created by F migration, are also directly observed. Additionally, DFT calculation results show that the electronic structure of the catalysts is modulated by the bimetallic centers, and this reconstruction helps optimizing the adsorption energy of oxygen‐containing species and improves OER activity.

show abstract

“…The EIS measurement was carried out with frequency ranges from 0.01 Hz to 100 kHz. The C F value can be calculated using CV curves and eq , where ∫ I d V is the integrated area of the CV curve, v is the scan rate, and Δ V is the potential window for measuring CV curves. , Also, the C F value was evaluated via GC/D curves and eq , where I is the current density, Δ V is the potential window for measuring the GC/D curve, and t is the discharge time in the GC/D curve. , In addition, the energy density ( E ) and power density ( P ) were calculated using eqs and , where Δ V is the potential window and t is the discharge duration in the GC/D curve. , …”

Section: Methodsmentioning

confidence: 99%

“…27,28 Also, the C F value was evaluated via GC/D curves and eq 2, where I is the current density, ΔV is the potential window for measuring the GC/D curve, and t is the discharge time in the GC/D curve. 29,30 In addition, the energy density (E) and power density (P) were calculated using eqs 3 and 4, where ΔV is the potential window and t is the discharge duration in the GC/D curve. 31,32…”

Section: Measurements and Characterizationsmentioning

confidence: 99%

Ligand Incorporating Sequence-dependent ZIF67 Derivatives as Active Material of Supercapacitor: Competition between Ammonia Fluoride and 2-Methylimidazole

Lee

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The zeolitic imidazolate framework 67 (ZIF67) derivative is a potential active material of supercapacitors (SC), owing to high specific surface area and porosity and possible formation of cobalt compounds. A novel ZIF67 derivative is synthesized using a one-step solution process with cobalt precursor 2-methylimidazole (2-Melm) and ammonia fluoride in our previous work. Due to its facile synthesis and excellent electrocapacitive behavior, it is crucial to understand the competition between ammonia fluoride and 2-Melm on forming derivatives with cobalt ions and to create more efficient ZIF67 derivatives for charge storage. In this work, several ZIF67 derivatives are designed using a one-step solution process with 2-Melm and ammonia fluoride incorporated in different sequences. The reaction durations for a single ligand and two ligands are controlled. The largest capacity of 176.33 mAh/g corresponding to the specific capacitance of 1057.99 F/g is achieved for the ZIF67 derivative electrode prepared by reacting ammonia fluoride and a cobalt precursor for 0.5 h and then incorporating 2-Melm for another 23.5 h of reaction (NM0.5). This derivative composed of highly conductive CoF 2 , NiF 2 , Co(OH)F, and Ni(OH)F presents high specific surface area and porosity. The relevant SC presents a maximum energy density of 19.5 Wh/kg at 430 W/kg, a capacity retention of 92%, and Coulombic efficiency of 96% in 10000 cycles.

show abstract

Developing zeolitic imidazolate frameworks 67-derived fluorides using 2-methylimidazole and ammonia fluoride for energy storage and electrocatalysis

Cited by 46 publications

References 65 publications

Efficient binder-free electrode with a derivative synthesis of a four-leaf clover cobalt oxide from a metal organic framework on nickel foam as an energy storage device

Efficient binder-free electrode with a derivative synthesis of a four-leaf clover cobalt oxide from a metal organic framework on nickel foam as an energy storage device

Surface Reconstruction Facilitated by Fluorine Migration and Bimetallic Center in NiCo Bimetallic Fluoride Toward Oxygen Evolution Reaction

Ligand Incorporating Sequence-dependent ZIF67 Derivatives as Active Material of Supercapacitor: Competition between Ammonia Fluoride and 2-Methylimidazole

Contact Info

Product

Resources

About