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Related Concept Videos

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.
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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.
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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Electrode strain dynamics in layered intercalation battery cathodes.

Tianxiao Sun1,2, Guannan Qian1,2, Ruqing Fang3

  • 1Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, USA.

Science (New York, N.Y.)
|December 18, 2025
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Summary
This summary is machine-generated.

Rechargeable battery electrodes degrade due to particle rearrangement during charging. This study reveals how chemical and physical processes asynchronously drive strain, leading to electrode deformation and performance loss in intercalation cathodes.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Rechargeable batteries with intercalation electrodes offer good cyclability but face performance limitations due to chemomechanical degradation.
  • Understanding electrode deformation mechanisms is crucial for improving battery longevity.

Purpose of the Study:

  • To investigate electrode strain evolution and particle dynamics in intercalation cathodes under electrochemical cycling.
  • To elucidate the interplay between chemical and mechanical processes driving degradation.

Main Methods:

  • Utilized a suite of operando microscopy techniques to observe electrode behavior in real-time.
  • Analyzed particle cluster rearrangement and strain accumulation during electrochemical stimuli.

Main Results:

  • Observed intricate particle cluster rearrangement and strain evolution during electrochemical cycling.
  • Identified early-stage strain accumulation linked to interparticle charge transfer and asynchronous chemical (de)intercalation and physical grain motion.
  • Demonstrated how this interplay leads to heterogeneous redox activity, localized charge equilibration, and multiscale strain cascades.

Conclusions:

  • Collective particle dynamics and hierarchical strain transmission are key factors dictating electrode deformation and degradation in intercalation cathodes.
  • The findings provide insights into the fundamental mechanisms of battery degradation, informing future material design.