Effects of chelating agent on the nanostructure of nickel hexacyanoferrate and its performance in seawater battery application

Jeong, Hyebin; Ahn, Sanghyun; Jo, Changshin

doi:10.1016/j.cej.2023.142834

Cited by 12 publications

(3 citation statements)

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“…[42][43][44][45][46] (3) Chemical inhibitor method: Introducing chelating agents such as citric acid or sodium citrate, causing the transition metal ions to coordinate with the chelating agents rst, reducing the concentration of metal ions in the monomer solution. [47][48][49] Lowering the nucleation rate can improve the microstructure of crystals to a certain extent, but this oen comes at the expense of reaction efficiency and product yield, and it is challenging to ensure batch stability when scaling up for industrial production. Therefore, there is an urgent need to focus on enhancing micro-mixing to balance product quality and production efficiency.…”

Section: Introductionmentioning

confidence: 99%

Y-tube assisted coprecipitation synthesis of iron-based Prussian blue analogues cathode materials for sodium-ion batteries

Zhang,

Liu,

Liu

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Y-tube assisted coprecipitation synthesis of iron-based Prussian blue analogues cathode materials for sodium-ion batteries

Zhang,

Liu,

Liu

et al. 2024

RSC Adv.

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“…By incorporating both carbon-based electrodes and transition metal oxides or conductive polymers, hybrid supercapacitors can store and deliver significantly more energy compared to traditional supercapacitors. 7 This enables them to provide rapid energy bursts for applications such as electric vehicles and renewable energy systems, while also offering a longer cycle life and faster charging times than conventional batteries. The development of hybrid supercapacitors represents a promising step toward addressing the growing demand for efficient and sustainable energy storage solutions in various industries.…”

Section: Introductionmentioning

confidence: 99%

“…It utilizes both electrochemical double-layer capacitance and pseudocapacitance mechanisms to achieve its unique performance characteristics. By incorporating both carbon-based electrodes and transition metal oxides or conductive polymers, hybrid supercapacitors can store and deliver significantly more energy compared to traditional supercapacitors . This enables them to provide rapid energy bursts for applications such as electric vehicles and renewable energy systems, while also offering a longer cycle life and faster charging times than conventional batteries.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Triggered Interplay of Capacitive and Diffusion Contributions for Boosted Supercapacitor Performance

Pandey

Bhowmick

Qureshi

2023

ACS Appl. Mater. Interfaces

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The chemistry involved in supercapacitors in terms of their mechanistic contributions leading to improved specific capacity will aid in easy commercialization. The main contributory factors in a supercapacitor are either capacitive (non-diffusion controlled) or ion-diffusion behavior, which results in enhanced charge−discharge characteristics of a supercapacitor reflected in its power density, whereas ion-diffusion behavior will lead to the enhanced energy density of a supercapacitor. In this context, the present article attempts to understand the use of external magnetic fields, leading to the interplay between capacitive and ion-diffusion behavior in a high-performance supercapacitor. The model system chosen in the present study, nickel cobalt copper carbonate hydroxide (NiCoCuCH), can effectively address the interplay between capacitive and ion diffusion contributions by varying total magnetic effects involving magnetic dilution. The magneto-enhancement of the electrodes nickel cobalt copper carbonate hydroxide (NiCoCuCH) and aluminum-doped nickel cobalt copper carbonate hydroxide (Al-NiCoCuCH) was demonstrated under the magnetic field from 0 to 250 mT. Both NiCoCuCH and Al-NiCoCuCH show dominant non-diffusion-controlled (capacitive) and diffusion-controlled behavior as a function of the applied external magnetic field. Under the influence of the external magnetic field, ferromagnetic coupling between metal−oxygen−metal centers via oxygen 2p orbitals enhances, leading to a facile redox pathway. To further control the charge−discharge behavior of the electrode via the interplay between diffusive and capacitive, a non-magnetic ion, Al 3+ , was doped into the bare metal carbonate hydroxide crystal lattice. The Al 3+ ion not only alters the crystal symmetry but also restricts the alignment of the magnetic domains in the electrode, leading to a sluggish redox pathway, effectively increasing the capacitive contribution, and leading to improved charge−discharge characteristics at the expense of energy density. We have constructed an asymmetric device with the best-performing (110 mT) NiCoCuCH electrode as a positive electrode and activated carbon as a negative electrode. The NiCoCuCH/AC ASC device at 110 mT has the largest specific capacity (1100 C g −1 at 2 A g −1 ) at 110 mT, leading to a high energy density (250 W h kg −1 ) and a power density (1.7 kW kg −1 ) of the electrode.

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Zero‐Strain Sodium Nickel Ferrocyanide as Cathode Material for Sodium‐Ion Batteries with Ultra‐Long Lifespan

Yuan,

Qiao,

Yuan

et al. 2024

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Prussian blue analogues are recognized as one of the most promising cathode materials for sodium‐ion batteries (SIBs) owing to the open 3D framework structure with large interstitial sites and developed Na‐ion diffusion channels. However, high content of anion vacancy and poor structural stability have hampered the prospect of their application. In this work, sodium nickel ferrocyanide (Na1.34Ni[Fe(CN)6]0.92, NNHCF) is proposed as cathode material for SIBs. N‐coordinated Ni‐ion can boost NNHCF to possess less Fe[(CN)6]4− defect, low Na‐ion migration barrier, and more negative formation energy compared with Na0.91Cu[Fe(CN)6]0.77 (NCHCF), thus exhibiting more active sites, fast electrochemical kinetics behavior and great structure stability. It is confirmed that NNHCF undergoes a solid solution mechanism without phase evolution for reversible Na‐ion intercalation/deintercalation, employing Fe associated with C atom as redox center for charge compensation. Therefore, NNHCF contributes a high initial energy density of 180.94 Wh·g−1 at 10 mA·g−1, excellent rate capability, superior cycling stability with ultra‐long lifespan of 13 000 cycles, and low fading rate of 0.0027% per cycle at 500 mA·g−1. This work sheds light on the construction of low‐defect PBA cathodes with outstanding dynamics and stability.

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Effects of chelating agent on the nanostructure of nickel hexacyanoferrate and its performance in seawater battery application

Cited by 12 publications

References 50 publications

Y-tube assisted coprecipitation synthesis of iron-based Prussian blue analogues cathode materials for sodium-ion batteries

Y-tube assisted coprecipitation synthesis of iron-based Prussian blue analogues cathode materials for sodium-ion batteries

Magnetically Triggered Interplay of Capacitive and Diffusion Contributions for Boosted Supercapacitor Performance

Zero‐Strain Sodium Nickel Ferrocyanide as Cathode Material for Sodium‐Ion Batteries with Ultra‐Long Lifespan

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