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Related Concept Videos

Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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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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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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Solid-state polymer-particle hybrid electrolytes: Structure and electrochemical properties.

Nyalaliska W Utomo1, Shifeng Hong2, Ritwick Sinha1

  • 1Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.

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This study introduces novel hybrid electrolytes for batteries, using lithium oxide particles in a polymerizable liquid. These electrolytes improve ion transport and enable stable, high-performance battery cycling, especially in anode-free designs.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid-state electrolytes (SSEs) face challenges with interfacial resistance and ion transport.
  • Developing advanced electrolytes is crucial for next-generation battery technologies.

Purpose of the Study:

  • Investigate a novel hybrid electrolyte composed of lithium oxide (Li2O) particles in polymerizable 1,3-dioxolane (DOL).
  • Explore the gradient properties and electrochemical performance of these hybrid electrolytes in lithium-ion batteries.

Main Methods:

  • Ring-opening polymerization (ROP) of DOL initiated by Lewis acid salts within battery cells.
  • Electrochemical analysis of Li||NCM811 and anode-free Cu||NCM811 cells.
  • Spectroscopic characterization of electrolyte properties.

Main Results:

  • Hybrid electrolytes exhibit gradient properties on particle and cell length scales.
  • Li2O particles modulate ROP, enhancing ion transport near particle surfaces.
  • Gravity-assisted settling creates beneficial gradients within the cells.
  • Reversible redox reactions involving Li2O particles boost coulombic efficiency (CE) to near 100% in anode-free cells.

Conclusions:

  • The developed polymer-inorganic hybrid electrolytes demonstrate stable cycling and enhanced performance in demanding battery configurations.
  • The unique gradient properties and interfacial behavior contribute to improved battery cycle life and efficiency.