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Related Concept Videos

Electrolysis03:00

Electrolysis

In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...

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Updated: May 8, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Conversion reactions for sodium-ion batteries.

Franziska Klein1, Birte Jache, Amrtha Bhide

  • 1Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany. philipp.adelhelm@uni-giessen.de.

Physical Chemistry Chemical Physics : PCCP
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Sodium-ion batteries offer high energy densities and low costs, with conversion reactions showing theoretical energy densities up to 1000 W h kg(-1). Comparing sodium and lithium-ion battery electrode materials reveals key thermodynamic properties for future development.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sodium-ion battery research is experiencing a resurgence, driven by the need for cost-effective electrode materials with high energy densities.
  • Assessing new sodium-ion battery materials necessitates comparison with established lithium-ion battery analogues.
  • Conversion reactions are a key area of focus for developing advanced sodium-ion battery chemistries.

Purpose of the Study:

  • To systematically evaluate various conversion reactions for sodium-ion batteries based on thermodynamic properties.
  • To compare these sodium-ion conversion reactions with their lithium-ion counterparts.
  • To identify promising electrode materials and reaction pathways for future sodium-ion battery research.

Main Methods:

  • Thermodynamic analysis of conversion reactions for sodium-ion batteries.
  • Comparative assessment of sodium-ion and lithium-ion battery electrode materials.
  • Summarization of capacities, voltages, energy densities, and volume expansions for potential electrode materials.
  • Experimental investigation of copper compounds (CuS, CuO, CuCl, CuCl2) with sodium.

Main Results:

  • Replacing lithium with sodium in conversion electrode materials results in a constant shift in cell potential (ΔE°(Li-Na)) that is material-class dependent.
  • For chloride materials, this potential shift (ΔE°(Li-Na)) is approximately zero.
  • Theoretical energy densities for sodium conversion reactions using fluorides or chlorides as positive electrodes range from 700 to 1000 W h kg(-1).
  • Copper chlorides exhibit conversion processes at defined potentials with minimal kinetic limitations due to electrolyte solubility.

Conclusions:

  • Sodium-ion batteries utilizing conversion reactions, particularly with chlorides, present a promising avenue for high-energy, low-cost energy storage.
  • The thermodynamic insights provide a roadmap for selecting and designing future sodium-ion battery electrode materials.
  • Further research into copper chlorides and other conversion materials is warranted to fully exploit their potential in sodium-ion batteries.