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Electrolysis03:00

Electrolysis

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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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Electrodeposition01:08

Electrodeposition

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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

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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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Batteries and Fuel Cells03:12

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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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Electrochemical Cells01:28

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Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not...
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Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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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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Electrochemical Lithium-Ion Recovery from Battery Recycling Process Water.

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Electrochemical desalination efficiently recovers high-purity Lithium-ions from spent batteries. This method offers a low environmental impact and energy efficiency, supporting a circular economy for critical materials.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Environmental Science

Background:

  • Electrochemical desalination is a promising technology for selective ion recovery from spent electronics.
  • It offers high energy efficiency and low environmental impact, crucial for circular economy initiatives.
  • Limited research exists on its application for recovering Lithium-ions from real spent battery solutions.

Purpose of the Study:

  • To investigate electrochemical desalination for recovering Lithium-ions from real spent battery solutions.
  • To obtain a high-purity Lithium-ion recovery solution using spent Lithium-iron-phosphate (LFP) batteries.
  • To assess the energy efficiency of this recovery process.

Main Methods:

  • Utilized solutions from shredded Lithium-iron-phosphate (LFP) batteries.
  • Employed electrochemical desalination techniques for ion separation.
  • Analyzed the purity of the recovered Lithium-ion solution and measured energy consumption.

Main Results:

  • Achieved a 96% pure Lithium-ion recovery solution.
  • Demonstrated a low energy input requirement of 1.10 kWh/kg.
  • Successfully applied the method to real spent battery leachate.

Conclusions:

  • Electrochemical desalination is effective for high-purity Lithium-ion recovery from spent LFP batteries.
  • The process is energy-efficient and environmentally friendly, supporting sustainable resource management.
  • This technology contributes to the circular economy by enabling the reuse of critical battery materials.