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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...
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Developing better ester- and ether-based electrolytes for potassium-ion batteries.

Lin Li1, Shuo Zhao1, Zhe Hu2

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Summary
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Optimizing electrolytes, including potassium salts and solvents, is key to improving potassium-ion batteries (PIBs). This review details strategies for enhanced electrochemical performance in ester- and ether-based electrolytes for advanced energy storage.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Potassium-ion batteries (PIBs) are promising for next-generation energy storage due to abundant potassium resources and low cost.
  • Current electrochemical performance of PIBs is insufficient for practical applications, necessitating performance enhancement.
  • Electrolyte optimization is a critical strategy for improving PIB performance.

Purpose of the Study:

  • To review recent advancements in ester- and ether-based electrolytes for high-performance PIBs.
  • To discuss essential components and requirements of organic electrolytes for PIBs.
  • To summarize strategies for electrolyte optimization in PIBs.

Main Methods:

  • Review of literature on potassium salt and solvent optimization for PIB electrolytes.
  • Analysis of electrolyte concentration optimization and the role of additives.
  • Discussion of how electrolyte modifications influence solvation energy and molecular orbital energy levels.

Main Results:

  • Electrolyte optimization strategies improve solvation energy, facilitating fast kinetics.
  • Optimized electrolytes contribute to a stable, highly K+-conductive solid-electrolyte interphase (SEI) layer.
  • Enhanced electrolytes offer superior oxidation resistance, crucial for battery longevity.

Conclusions:

  • Electrolyte composition significantly impacts characteristics and performance of PIBs.
  • Further research should explore the fundamental relationships between electrolyte composition and performance.
  • This review provides guidance for developing advanced electrolytes for high-performance PIBs.