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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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In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
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Advanced Electrolyte Engineering for Low-Temperature Sodium-Ion Batteries.

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Sodium-ion batteries (SIBs) show promise for low-temperature applications. This review details electrolyte challenges and strategies to improve SIB performance in cold conditions.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Sodium-ion batteries (SIBs) are cost-effective alternatives to lithium-ion batteries (LIBs) due to abundant sodium resources.
  • SIBs possess unique electrochemical properties suitable for low-temperature operation.
  • Low temperatures impede Na+ transport, increase interfacial energy barriers, and destabilize the solid electrolyte interphase (SEI), degrading battery performance.

Purpose of the Study:

  • To analyze the failure mechanisms of SIB electrolytes at low temperatures.
  • To summarize current strategies for designing and optimizing low-temperature SIB electrolytes.
  • To provide insights into future development trends for advanced low-temperature SIBs.

Main Methods:

  • Comprehensive review of existing literature on SIB electrolyte performance at low temperatures.
  • Analysis of electrolyte failure modes including ion transport, solvation, and SEI dynamics.
  • Categorization and summary of electrolyte optimization strategies.

Main Results:

  • Low temperatures significantly hinder Na+ kinetics and increase interfacial impedance in SIBs.
  • Electrolyte degradation at low temperatures leads to capacity fade, reduced power, and shortened cycle life.
  • Various strategies, including solvent engineering and additive use, can mitigate these low-temperature issues.

Conclusions:

  • Addressing low-temperature electrolyte challenges is crucial for unlocking the full potential of SIBs.
  • Optimized electrolytes are key to achieving stable and efficient SIB operation in cold environments.
  • Future research should focus on novel electrolyte systems and advanced materials for next-generation low-temperature SIBs.