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Related Concept Videos

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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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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Ionic Radii03:10

Ionic Radii

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Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
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Electrolytes: van't Hoff Factor03:08

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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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Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Related Experiment Video

Updated: Jan 25, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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A Metal-free Battery with Pure Ionic Liquid Electrolyte.

Jian Qin1, Qing Lan1, Ning Liu1

  • 1Hubei Key Lab of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.

Iscience
|April 27, 2019
PubMed
Summary

This study introduces metal-free, solvent-free organic batteries using organic cations for improved performance. This innovation offers a safer, greener alternative to traditional metal-ion batteries, achieving high capacity and long cycle life.

Keywords:
Electrical PropertyElectrochemistryEnergy Materials

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Metal-ion batteries dominate current technology but face challenges like dendrite growth and safety concerns.
  • Existing battery designs often rely on metal salts dissolved in solvents, posing environmental and safety risks.

Purpose of the Study:

  • To explore the potential of organic cations for intercalation/deintercalation in all-organic batteries.
  • To develop a metal-free and solvent-free battery concept as a sustainable alternative.

Main Methods:

  • Fabrication of an all-organic full-cell battery using polyimide anode, polytriphenylamine cathode, and an ionic liquid electrolyte.
  • Evaluation of electrochemical performance, including capacity, cycling stability, rate capability, and low-temperature performance.

Main Results:

  • Achieved capacity close to the theoretical value.
  • Demonstrated over 5,000 cycles with excellent stability.
  • Exhibited high rate capability up to 200 C and remarkable low-temperature performance.

Conclusions:

  • The developed all-organic battery system offers a viable, high-performance alternative to metal-ion batteries.
  • This metal-free and solvent-free approach presents a pathway towards efficient, safe, and green energy storage solutions.