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Related Concept Videos

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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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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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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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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Facilitated Transport

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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Artificial Solid-Electrolyte Interface Facilitating Dendrite-Free Zinc Metal Anodes via Nanowetting Effect.

Mingqiang Liu1, Luyi Yang1, Hao Liu1

  • 1School of Advanced Materials , Peking University Shenzhen Graduate School , Shenzhen 518055 , China.

ACS Applied Materials & Interfaces
|August 14, 2019
PubMed
Summary

Researchers developed a novel protective layer using metal-organic frameworks (MOFs) to prevent dendrite formation on zinc anodes in aqueous batteries, enhancing stability and performance.

Keywords:
aqueous batteryartificial SEInanowettingzinc dendritezinc metal anode

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Dendrite formation on zinc (Zn) anodes hinders the practical application of aqueous batteries.
  • Poor wetting of the Zn anode by aqueous electrolytes exacerbates interface instability.

Purpose of the Study:

  • To engineer an artificial composite protective layer to reconstruct the Zn/electrolyte interface.
  • To improve the wetting effect and regulate electrolyte flux on the Zn anode.

Main Methods:

  • Fabrication of a composite protective layer using nanosized metal-organic frameworks (MOFs).
  • Characterization of the Zn/electrolyte interface and electrochemical performance.
  • Evaluation of Zn plating/stripping cycling and Zn/MnO2 battery performance.

Main Results:

  • The MOF-based layer significantly improved the wetting of the Zn anode.
  • A stable, zincophilic interface with reduced charge-transfer resistance was achieved.
  • Dendrite-free Zn plating/stripping was sustained for over 500 cycles.
  • Reduced overpotentials were observed in Zn/MnO2 batteries, especially at higher C-rates.

Conclusions:

  • The proposed artificial composite layer effectively reconstructs the metal anode interface.
  • This approach offers a viable strategy for stable aqueous batteries by overcoming SEI limitations.