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Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
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Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
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Boosting Potassium Storage via Multifunctional Interface with High Lattice-Matching.

Junping Miao1, Shuaitong Liang2, Haiting Shi3

  • 1State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin, 300387, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 20, 2023
PubMed
Summary

Interface engineering enhances potassium storage by creating dual carbon-modified regions within a CoSe2/FeSe2 heterostructure. This design accelerates charge transport and improves electrode stability for high-performance energy storage.

Keywords:
internal/external interfacelattice-matchingpotassium storagetransition metal selenides

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Potassium-ion storage faces challenges from large volume expansions and slow redox kinetics.
  • Atomic-scale interface engineering is crucial for improving electrode performance.
  • Developing stable and efficient electrode materials is essential for advanced energy storage.

Purpose of the Study:

  • To engineer atomic-scale interfaces for enhanced potassium storage.
  • To accelerate charge transport and reduce activation energy in electrode materials.
  • To investigate the role of heterostructures and carbon modification in electrode stability and kinetics.

Main Methods:

  • Synthesis of a CoSe2/FeSe2 heterostructure coated on hollow carbon fibers.
  • Utilizing dual carbon-modified interfacial regions for improved properties.
  • Employing advanced characterization techniques: ex-situ soft X-ray absorption spectroscopy, synchrotron X-ray tomography, ultrasonic transmission mapping.
  • Conducting theoretical analysis using density functional theory (DFT).

Main Results:

  • High lattice-matching degree achieved in the CoSe2/FeSe2 heterostructure.
  • Dual carbon modification effectively tailored physicochemical degradation.
  • Heterostructure with the same crystal system and space group sharply regulated transition metal selenium redox kinetics.
  • Identified ion/electron migration pathways and local atomic structure evolution.

Conclusions:

  • The designed stable heterojunction synergistic hollow carbon substrate offers a promising interface engineering strategy.
  • This approach significantly enhances electrode performance for potassium-ion storage.
  • The study provides insights into atomic-scale design for high-performance energy storage materials.