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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Colligative Properties of Electrolytes
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In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
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Roles of Electrolytes: Sodium and Potassium01:24

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Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
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Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
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Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
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Aligned Ionogel Electrolytes for High-Temperature Supercapacitors.

Xinhua Liu1,2, Oluwadamilola O Taiwo3, Chengyao Yin1

  • 1School of Chemical Science and Engineering Tongji University Shanghai 200092 P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2019
PubMed
Summary
This summary is machine-generated.

Aligned ionogels offer enhanced ionic conductivity and mechanical strength for solid-state energy storage. This breakthrough improves supercapacitor performance, paving the way for advanced wearable electronics.

Keywords:
X‐ray tomographyaligned ionogelssupercapacitorsthermal tolerancetortuosity factors

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Ionogels are promising for solid-state energy storage, acting as integrated separators and electrolytes.
  • Crosslinking polymers improve mechanical properties but reduce ionic conductivity in ionogels.
  • Developing ionogels with both high conductivity and mechanical strength is crucial for device performance.

Purpose of the Study:

  • To synthesize aligned nanocomposite ionogels with enhanced ionic conductivity and mechanical properties.
  • To investigate the performance of these aligned ionogels in supercapacitors.
  • To elucidate the relationship between ionogel alignment and ionic transport mechanisms.

Main Methods:

  • Directional freezing technique followed by solvent replacement for ionogel preparation.
  • Fabrication and electrochemical testing of supercapacitors using aligned and nonaligned ionogels.
  • 3D reconstructed tomography and diffusion simulations to analyze ionic conductivity.

Main Results:

  • Aligned ionogels exhibit simultaneously enhanced ionic conductivity (22.1 mS cm⁻¹), mechanical strength, and thermal stability.
  • Supercapacitors utilizing aligned ionogels show a 29% increase in specific capacitance (176 F g⁻¹ at 25 °C).
  • High specific capacitance (167 F g⁻¹ at 10 A g⁻¹) is maintained at elevated temperatures (200 °C).

Conclusions:

  • Aligned nanocomposite ionogels represent a significant advancement for solid-state electrolytes.
  • The directional alignment strategy effectively overcomes the conductivity limitations of traditional ionogels.
  • This research offers a promising pathway for developing high-performance supercapacitors and wearable electronics.