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Related Concept Videos

Alkali Metals03:06

Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
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Electrolysis03:00

Electrolysis

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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...
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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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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Standard Electrode Potentials03:02

Standard Electrode Potentials

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

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Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Carbon Electrode Materials for Advanced Potassium-Ion Storage.

Wenchao Zhang1,2, Rui Huang1,2, Xu Yan1,2

  • 1School of Metallurgy and Environment, Central South University, Changsha, 410083, China.

Angewandte Chemie (International Ed. in English)
|July 16, 2023
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Summary

Advanced carbon materials offer a low-cost solution for potassium-ion batteries. This review details their use in energy storage, guiding future design for high-performance potassium-ion devices.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Potassium-ion batteries are promising due to abundant resources and good ion transport.
  • Practical development requires cost-effective, high-performance electrode materials.
  • Advanced carbon materials are attractive for potassium-ion storage due to cost and properties.

Purpose of the Study:

  • To provide an overview of carbon-based electrode materials for potassium-ion batteries.
  • To discuss recent advancements and mechanistic understanding in this field.
  • To offer guidance on carbon material design for next-generation potassium-ion storage.

Main Methods:

  • Literature review of recent advancements in carbon-based materials for potassium-ion batteries.
  • Analysis of mechanistic understanding of potassium-ion storage in carbon materials.
  • Discussion of dual-ion and conversion-type batteries and K-metal protection.

Main Results:

  • Carbon materials show great potential for cost-effective and high-performance potassium-ion storage.
  • Recent studies offer advanced mechanistic insights into carbon-based electrodes.
  • Dual-ion and conversion-type batteries show promise for high-voltage/high-power applications.

Conclusions:

  • Carbon materials are key for developing practical and scalable potassium-ion batteries.
  • Understanding structure-performance relationships is crucial for optimizing carbon electrode design.
  • Future research should focus on advanced carbon materials for enhanced potassium energy storage.