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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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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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Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
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Light Enables the Cathodic Interface Reaction Reversibility in Solid-State Lithium-Oxygen Batteries.

Liping Ren1, Ming Zheng1, Fanpeng Kong1

  • 1State Key: Laboratory of Space Power-Sources, School of Chemistry and⋅Chemical Engineering, Harbin Institute of Technology, Harbin⋅, 150001, China.

Angewandte Chemie (International Ed. in English)
|March 5, 2024
PubMed
Summary

Light enhances solid-state lithium-oxygen batteries by improving charge transfer and regulating discharge products. This leads to stable, flexible batteries for solar energy storage.

Keywords:
Flexible batterieselectrochemical behaviorlight assistancepolytype MoS2solid-state lithium-oxygen battery

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state cathodes (SSCs) in solid-state lithium-oxygen batteries (SSLOBs) face challenges due to limited triple-phase boundaries from discharge product accumulation.
  • The fundamental mechanisms governing SSC interface behavior in light-assisted SSLOBs remain unclear.

Purpose of the Study:

  • To elucidate the mechanisms of light assistance on SSC interface behavior in SSLOBs.
  • To investigate the impact of light on charge transfer, discharge product formation, and cathode stability.

Main Methods:

  • Investigated light-assisted solid-state lithium-oxygen batteries.
  • Analyzed charge transfer dynamics and discharge product morphology.
  • Evaluated cathode stability and electrochemical performance.

Main Results:

  • Light assistance enhances inner-sphere charge transfer in SSCs.
  • Discharge products are regulated into spherical particles via a surface growth model.
  • High photoelectron excitation and transport capabilities retard cathodic decay, reducing charge voltage.
  • Light-induced SSLOBs demonstrate 170 cycles stability with 0.27 V polarization.
  • Transparent, flexible SSLOBs were fabricated for practical applications.

Conclusions:

  • Light-assisted SSLOBs offer a promising pathway for enhanced energy storage.
  • The study reveals mechanisms for improved stability and performance through light intervention.
  • Fabricated flexible SSLOBs pave the way for integrated solar energy storage solutions.