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Related Concept Videos

Metallic Solids02:37

Metallic Solids

20.6K
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....
20.6K
Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

2.0K
Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
2.0K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

71.7K
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.
71.7K
Alkali Metals03:06

Alkali Metals

24.5K
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
24.5K
Bonding in Metals02:32

Bonding in Metals

52.3K
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”. 
52.3K
Electrolytes: van't Hoff Factor03:08

Electrolytes: van't Hoff Factor

36.5K
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...
36.5K

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Stabilizing the Interface between Sodium Metal Anode and Sulfide-Based Solid-State Electrolyte with an

Pu Hu1, Ye Zhang1, Xiaowei Chi1

  • 1Department of Electrical and Computer Engineering and Materials Science and Engineering Program , University of Houston , Houston , Texas 77204 , United States.

ACS Applied Materials & Interfaces
|February 27, 2019
PubMed
Summary
This summary is machine-generated.

A cellulose-poly(ethylene oxide) interlayer stabilizes sodium-ion conductors in all-solid-state sodium batteries. This breakthrough enables 800 cycles of stable sodium cycling, overcoming previous interfacial challenges for better battery performance.

Keywords:
Na metal anodeNa3SbS4interfacial stabilitypolymer composite interlayersulfide-based solid electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sulfide-based sodium-ion conductors offer high ionic conductivity and formability for all-solid-state sodium batteries (ASSSBs).
  • Interfacial instability during sodium cycling has limited the long-term performance of sulfide electrolytes in ASSSBs.
  • Existing strategies have not effectively addressed the electrolyte decomposition reactions at the interface.

Purpose of the Study:

  • To develop an effective strategy for stabilizing the sodium metal-sulfide electrolyte interface in ASSSBs.
  • To enable long-duration and stable cycling of sodium metal anodes in ASSSBs.
  • To investigate the role of a novel interlayer in mitigating interfacial challenges.

Main Methods:

  • Fabrication of a cellulose-poly(ethylene oxide) (CPEO) interlayer.
  • Integration of the CPEO interlayer between a Na3SbS4 sulfide electrolyte and a sodium metal anode.
  • Electrochemical characterization, including long-term cycling tests of sodium plating/stripping.

Main Results:

  • The CPEO interlayer effectively suppressed electrolyte decomposition by blocking electron pathways.
  • Stable sodium plating and stripping were achieved for 800 cycles at a current density of 0.1 mA cm⁻².
  • The interface between the sulfide electrolyte and sodium metal was significantly stabilized at 60 °C.

Conclusions:

  • The CPEO interlayer is a promising solution for interfacial challenges in sulfide-based ASSSBs.
  • This strategy enables stable and long-duration sodium cycling, paving the way for practical ASSSB applications.
  • The findings highlight the importance of interface engineering for advanced battery chemistries.