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Related Concept Videos

Formation of Complex Ions03:45

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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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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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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Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Zinc anode-compatible in-situ solid electrolyte interphase via cation solvation modulation.

Huayu Qiu1,2, Xiaofan Du1, Jingwen Zhao3

  • 1Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, P. R. China.

Nature Communications
|November 28, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel zinc fluoride-rich interphase for rechargeable zinc batteries. This protective layer ensures stable, dendrite-free zinc plating and stripping, enhancing battery lifespan and performance.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Solid electrolyte interphase (SEI) chemistry is crucial for rechargeable battery longevity.
  • SEI formation on zinc anodes is underexplored due to electrolyte limitations and high redox potential.
  • Developing stable zinc anodes is key for next-generation energy storage.

Purpose of the Study:

  • To investigate the formation and properties of a novel SEI on zinc anodes.
  • To understand the role of electrolyte composition in SEI development.
  • To evaluate the performance of zinc anodes protected by the novel SEI.

Main Methods:

  • Experimental characterization of the SEI.
  • Computational modeling to understand SEI formation mechanisms.
  • Electrochemical testing of zinc plating/stripping and battery cycling.

Main Results:

  • Observed a zinc fluoride-rich hybrid organic/inorganic SEI using acetamide-Zn(TFSI)2 electrolyte.
  • Identified anion-complexing zinc species as key to in situ SEI formation.
  • Achieved reversible zinc plating/stripping with ~100% Coulombic efficiency and dendrite-free morphology at high capacities (>2.5 mAh cm⁻²).
  • Demonstrated excellent cycling stability with negligible capacity fade at various rates.

Conclusions:

  • The developed SEI enhances zinc anode stability and cycling performance.
  • The acetamide-Zn(TFSI)2 electrolyte facilitates the formation of a protective interphase.
  • This interphasial design offers a promising strategy for high-performance rechargeable zinc batteries.