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Lin, Yechao, et al. Journal of Colloid and Interface Science 623 (2022): 1-8.
Ethylenediaminetetraacetic acid dipotassium salt (EDTA-2K) is employed as a structure-directing agent in the controlled synthesis of Potassium Prussian Blue (KPB) for high-performance potassium-ion battery (KIB) applications. In this study, EDTA-2K was introduced during the coprecipitation process of KPB to regulate nucleation and crystal growth, resulting in enhanced particle size uniformity and structural stability.
By forming stable chelate complexes with Fe²⁺, EDTA-2K modulates the availability of metal ions during the formation of KPB, effectively slowing down the reaction kinetics. This control suppresses the formation of structural defects and enhances the crystallinity of the final KPB product. The KPB sample synthesized with EDTA-2K (denoted KPB-2E) showed superior electrochemical performance compared to samples prepared without the chelating agent.
When combined with an advanced electrolyte (potassium bis(fluorosulfonyl)imide, KFSI), KPB-2E exhibited dual discharge plateaus at 3.4 V and 4.0 V with a reversible capacity of 92.7 mAh g⁻¹ at 0.03 A g⁻¹. In a full-cell configuration with a graphite anode, the KPB-2E cathode achieved a high capacity of 102.4 mAh g⁻¹ and remarkable cycling stability, retaining 88% capacity over 375 cycles at 1 A g⁻¹.
This work highlights the vital role of EDTA-2K in engineering cathode materials with improved structural integrity and long-term electrochemical stability, providing a scalable approach for next-generation potassium-ion energy storage systems.
Zhang, Lifei, et al. Materials Science in Semiconductor Processing 160 (2023): 107410.
Dipotassium ethylenediaminetetraacetic acid (EDTA-2K) is utilized as a key complexing agent in the development of alkaline colloidal silica-based slurries for chemical mechanical polishing (CMP) of cobalt (Co) interconnects in integrated circuits. Cobalt, a promising material for next-generation interconnects, requires precise removal and surface protection during CMP due to its susceptibility to corrosion and its role in heterogeneous material stacks.
In the formulated slurry containing 0.5 wt% hydrogen peroxide (oxidizer), 5 mM EDTA-2K (complexing agent), and 13 mM potassium oleate (inhibitor), EDTA-2K plays a critical role in regulating both material removal rates (MRRs) and surface etching rates (SERs). Upon dissociation in alkaline medium, EDTA-2K forms fully deprotonated EDTA⁴⁻ ions that chelate with Co²⁺, forming a highly stable Co(II)EDTA complex. This effectively facilitates controlled cobalt dissolution while maintaining high MRR selectivity (~2:1:1) between Co, barrier layers (Ti/TiN), and dielectric (TEOS).
Synergistic interactions between EDTA-2K and potassium oleate were revealed through electrochemical and surface analyses. At optimized PO concentrations, a passivation layer formed on the Co surface inhibits aggressive corrosion, while at elevated PO levels, Co(II)PO complexes destabilize this layer, enabling EDTA-2K to access Co and sustain controlled polishing.
This study highlights EDTA-2K's essential role in tailoring CMP slurry chemistry, enabling uniform Co removal and surface stability critical for advanced semiconductor manufacturing.
Wang, Zeyu, et al. Nano Energy 98 (2022): 107243.
Ethylenediaminetetraacetic acid dipotassium (EDTA-2K) is employed as a complexing agent to induce Fe³⁺ vacancies in Prussian blue analogs (PBAs), significantly enhancing their electrochemical performance in potassium-ion batteries (KIBs). In this work, EDTA-2K is introduced into the precursor solution during the wet-chemical synthesis of Fe-based PBAs, yielding a defect-engineered material denoted as KFeHCF-V.
The coordination of EDTA-2K with Fe ions slows down their release during crystallization, thereby suppressing the oxidation to Fe³⁺ and generating abundant Fe³⁺ vacancies in the lattice. These vacancies play a pivotal role in mitigating the typical cubic-to-tetragonal phase transition during cycling, which is responsible for capacity fading and structural collapse.
As a result, the KFeHCF-V cathode delivers a superior discharge capacity of 66 mAh g⁻¹ at 25 mA g⁻¹ and retains 40 mAh g⁻¹ after 250 cycles at 100 mA g⁻¹-significantly outperforming its vacancy-free counterpart. Structural analysis via XPS, XRD, and Raman confirms the reduction of Fe³⁺ content and preservation of the cubic phase, while DFT calculations reveal reduced lattice distortion due to vacancy incorporation.
This study underscores the critical role of EDTA-2K in vacancy engineering of PBAs, providing a scalable and effective strategy to design high-performance KIB cathode materials.
How soluble is dipotassium EDTA?
Dipotassium EDTA soluble in water, slightly soluble in alcohols
What are the relevant applications of dipotassium EDTA?
Dipotassium EDTA Used for complexing metal ions and separating metals, also used in detergents, liquid soaps, shampoos, agrochemical sprays, antidotes, blood anticoagulants
What are the storage conditions for dipotassium EDTA?
Dipotassium EDTA should be stored under inert gas and at room temperature.
What category of reagent does dipotassium EDTA's belong to?
Dipotassium EDTA is an organic chemical material
What is the density of dipotassium EDTA?
1.767-1.8 at 20℃
What is the form of dipotassium EDTA?
White crystalline powder
What is the LogP of dipotassium EDTA?
-4.3--3.86 at 25℃
What is the maximum solubility of dipotassium EDTA in water?
108g/L at 20-25℃
What is the melting point of dipotassium EDTA?
272℃
What is the molecular mass of dipotassium EDTA?
332.35
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