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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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Standard Electrode Potentials03:02

Standard Electrode Potentials

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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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Electrodes: Overview01:17

Electrodes: Overview

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 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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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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Solid Electrolyte-Cathode Interface Dictates Reaction Heterogeneity and Anode Stability.

Kaustubh G Naik1, Debanjali Chatterjee1, Partha P Mukherjee1

  • 1School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.

ACS Applied Materials & Interfaces
|September 28, 2022
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Summary
This summary is machine-generated.

Solid-state batteries (SSBs) face challenges with lithium metal anode stability due to uneven electrodeposition. Cathode structure and solid electrolyte design significantly impact this interface, affecting SSB safety and performance.

Keywords:
anode stabilityanode−solid electrolyte interfacearchitected cathodecathode microstructurecathode−solid electrolyte interfacereaction heterogeneitysolid-state batteries

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Area of Science:

  • Materials Science and Engineering
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state batteries (SSBs) with lithium metal anodes offer high energy and power density for next-generation applications.
  • Interfacial instabilities, particularly non-uniform electrodeposition at the anode-solid electrolyte (SE) interface, limit SSB safety and lifespan.
  • Cathode microstructural heterogeneity can induce non-uniform kinetic interactions, exacerbating anode instability.

Purpose of the Study:

  • To investigate the impact of cathode microstructural heterogeneity on anode stability in SSBs.
  • To elucidate the role of cathode architecture and SE separator design in controlling interfacial reaction heterogeneity.
  • To identify key parameters influencing anode-SE interface behavior and propose mitigation strategies.

Main Methods:

  • Comprehensive analysis of cathode-anode cross-talk driven by microstructural heterogeneity.
  • Evaluation of intrinsic and extrinsic parameters affecting interfacial reaction heterogeneity (e.g., cathode loading, separator thickness, particle morphology, temperature).
  • Investigation of the trade-offs between energy density and anode stability.

Main Results:

  • Cathode microstructural heterogeneity significantly influences reaction heterogeneity at the anode-SE interface.
  • Parameters like cathode loading, separator thickness, material morphologies, and temperature critically affect anode stability.
  • A trade-off exists between achieving higher energy density (via increased cathode loading and thinner SE separators) and maintaining anode stability.

Conclusions:

  • Understanding cathode-anode cross-talk is crucial for enhancing SSB performance.
  • Electrode engineering, considering interfacial heterogeneities, is key to improving energy densities and safety in SSBs.
  • Optimizing cathode architecture and SE separator design can mitigate interfacial instabilities and improve battery endurance.