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Related Concept Videos

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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Electrolysis03:00

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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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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Electrogravimetric Analysis: Overview01:30

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Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
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Introduction to Electrolytes01:33

Introduction to Electrolytes

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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.
Role of Sodium
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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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Updated: Oct 26, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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High-voltage liquid electrolytes for Li batteries: progress and perspectives.

Xiulin Fan1, Chunsheng Wang2

  • 1State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China. xlfan@zju.edu.cn.

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Developing advanced electrolytes is crucial for next-generation lithium-ion batteries (LIBs). New electrolyte compositions are needed to enable higher voltage cathodes and anodes for improved energy density.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-ion batteries (LIBs) have significantly increased energy density, primarily through electrode capacity enhancements.
  • Current LIBs face limitations due to electrolyte stability at high voltages, hindering further energy density improvements.
  • Next-generation batteries require electrolytes stable at higher cut-off voltages for advanced cathodes and anodes like silicon or lithium metal.

Purpose of the Study:

  • To provide a comprehensive review of novel high-voltage electrolyte systems for LIBs.
  • To examine the fundamental mechanisms, challenges, and design strategies for these advanced electrolytes.
  • To highlight the critical role of electrolyte stability and interphase layers in battery performance.

Main Methods:

  • Literature review of recent advances in high-voltage electrolyte research.
  • Analysis of electrolyte stability, electrode-electrolyte interactions, and reaction mechanisms.
  • Discussion of challenges and design strategies for next-generation electrolytes.

Main Results:

  • Commercial electrolytes are insufficient for high-voltage LIBs due to limited anodic stability (~4.3 V vs. Li+/Li).
  • Electrolyte oxidation resistance and the quality of *in situ* formed cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) layers are critical.
  • Novel electrolyte compositions are essential to overcome current bottlenecks and enable higher energy densities.

Conclusions:

  • Effective SEI/CEI layers and stable high-voltage electrolytes are key to revolutionary LIB chemistries.
  • Further research into electrolyte design and interphase formation is needed to unlock the potential of next-generation batteries.
  • This review offers insights and potential solutions for developing advanced electrolytes for high-voltage LIBs.