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Electrolyte and Nonelectrolyte Solutions02:21

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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
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
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Conjugate Addition (1,4-Addition) vs Direct Addition (1,2-Addition)01:27

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α,β-Unsaturated carbonyl compounds with two electrophilic sites, the carbonyl carbon, and the β carbon, are susceptible to nucleophilic attack via two modes: conjugate or 1,4-addition and direct or 1,2-addition.
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Introduction to Electrolytes01:33

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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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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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The movement of electrons in a conductor requires some form of energy or work, usually provided by an external force, like a battery. This force is called the electromotive force or voltage. The voltage between two points, referred to as points "a" and "b," in an electric circuit is the energy (or work) needed to move a unit charge from point "a" to point "b," and this relationship is expressed mathematically as
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Updated: Jan 26, 2026

Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive
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Stabilizing LiCoO2/Graphite at High Voltages with an Electrolyte Additive.

Suping Wu, Yilong Lin, Lidan Xing

  • 1Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division , U.S. Army Research Laboratory , Adelphi , Maryland 20783 , United States.

ACS Applied Materials & Interfaces
|April 17, 2019
PubMed
Summary

A new additive, 4-propyl-[1,3,2]dioxathiolane-2,2-dioxide (PDTD), enhances lithium-ion battery performance by stabilizing interfaces. This allows for higher charging potentials, improving energy density and cycling stability in commercial LiCoO2 batteries.

Keywords:
cobalt coordinationcyclic stabilityelectrolyte additivehigh voltagelithium cobalt oxide/graphite cell

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Commercial lithium-ion batteries (LIBs) using LiCoO2 (lithium cobalt oxide) face limitations in energy density.
  • Instability of carbonate electrolytes above 4.5 V restricts access to lithium ions within the cathode structure.

Purpose of the Study:

  • To develop a novel approach to fully utilize lithium ions in LiCoO2 cathodes.
  • To enhance the stability of both anode and cathode interfaces in LIBs.
  • To improve the energy density and cycling stability of commercial LIB chemistries.

Main Methods:

  • A designed additive, 4-propyl-[1,3,2]dioxathiolane-2,2-dioxide (PDTD), was synthesized and incorporated into electrolytes.
  • PDTD was investigated for its ability to coordinate with dissolved cobalt ions and form protective interphases.
  • The performance of LiCoO2/graphite cells with PDTD was evaluated at higher charging potentials.

Main Results:

  • PDTD effectively coordinates with dissolved cobalt ions, preventing the formation of detrimental cobalt metal on the anode.
  • Protective interphases are formed on both cathode and anode surfaces by PDTD decomposition.
  • Cells with PDTD achieved a higher charging potential of 4.45 V, showing improved energy density and cycling stability.

Conclusions:

  • PDTD acts as a multifunctional additive, stabilizing interfaces and enabling higher operating voltages in LiCoO2-based LIBs.
  • The use of PDTD represents a significant advancement for improving the performance of widely used commercial LIBs.