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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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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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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.4K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Composite Ionogel Electrodes for Polymeric Solid-State Li-Ion Batteries.

Noah B Schorr1, Austin Bhandarkar2, Josefine D McBrayer1

  • 1Department of Power Sources R&D, Sandia National Laboratories, Albuquerque, NM 87123, USA.

Polymers
|July 13, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed ionogel-derived solid-state electrolytes for high-performance lithium-ion cells. This scalable approach enables high active material loading in composite electrodes for improved energy density and stable cycling.

Keywords:
Li-ion batteryionogelpolymer electrolytesolid-state electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Achieving high energy and power density in rechargeable cells is crucial for applications like electric vehicles and portable electronics.
  • Solid-state batteries offer potential safety advantages over conventional lithium-ion cells, but electrode design remains a significant challenge.
  • High active material loading in electrodes is essential for practical energy density, yet difficult to achieve in solid-state systems.

Purpose of the Study:

  • To develop a novel strategy for fabricating composite electrodes with high active material loading for solid-state lithium-ion cells.
  • To investigate the performance of ionogel-derived solid-state electrolytes in enabling scalable fabrication of high-performance cells.
  • To demonstrate the potential of these composite electrodes and electrolytes in achieving high capacity utilization and stable cycling.

Main Methods:

  • Utilized ionogel-derived solid-state electrolytes (SSEs) to create composite electrodes.
  • Tuned precursor and active material composition in composite lithium titanate electrodes.
  • Fabricated and tested full polymeric solid-state cells incorporating composite anodes and lithium iron phosphate cathodes with ionogel SSEs.

Main Results:

  • Achieved high active material loading (>10 mg/cm², ~9 mA/cm² at 1C) using a scalable approach.
  • Demonstrated near-theoretical capacity utilization at C/5 rates in composite lithium titanate electrodes.
  • Attained stable cycling at 5.85 mA/cm² (11.70 A/g) with over 99% average Coulombic efficiency at room temperature.
  • Showcased a complete solid-state cell with stable cycling at a 1C rate.

Conclusions:

  • Ionogel-derived SSEs provide a viable pathway for scalable fabrication of high-performance solid-state lithium-ion cells.
  • The developed composite electrode strategy effectively addresses the challenge of high active material loading.
  • These advancements pave the way for safer and more energy-dense solid-state batteries.