Related Experiment Video
Updated: Jun 21, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
Universal Strike-Plating Strategy to Suppress Hydrogen Evolution for Improving Zinc Metal Reversibility
Yang Yang1,2, Ruijie Zhu3, Gang Wu1,2
1Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba 305-8573, Japan.
ACS Nano
|July 10, 2024
Summary
A new strike-plating strategy enhances zinc battery performance by suppressing hydrogen evolution reactions. This method improves zinc reversibility and enables high-capacity aqueous zinc batteries.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Rechargeable aqueous zinc batteries are crucial for energy storage, but their feasibility is limited by the reversibility of zinc metal anodes.
- The hydrogen evolution reaction (HER) significantly hinders zinc reversibility by forming passivation layers on the electrode surface.
- Understanding and mitigating HER is essential for advancing zinc battery technology.
Purpose of the Study:
- To quantitatively evaluate the adverse effects of HER on zinc reversibility in batteries.
- To investigate the role of substrate design in modulating HER and associated side reactions.
- To develop and validate a novel strategy for improving zinc anode reversibility.
Main Methods:
- A strike-plating strategy was employed, initiating zinc plating at high current density for a short duration.
- The modified substrate's effect on HER suppression and electrodeposition mode was analyzed.
- Zinc reversibility was measured on stainless steel and copper substrates over extended cycling periods.
- Performance of full cells with varying N/P ratios was evaluated.
Main Results:
- The strike-plating strategy effectively suppresses hydrogen evolution, favoring zinc reduction.
- Zinc anodes achieved high average reversibility (98.80% over 200 h) on stainless steel substrates.
- Exceptional reversibility (99.83% over 540 h) was demonstrated on copper substrates at 10 mAh cm-2.
- High-performance zinc full cells with low N/P ratios were successfully fabricated.
Conclusions:
- The strike-plating strategy is a straightforward and effective method to enhance zinc anode reversibility in aqueous electrolytes.
- This approach overcomes limitations posed by HER, enabling high-performance rechargeable aqueous zinc batteries.
- The findings provide a foundation for optimizing zinc-based battery mechanisms and performance.
Related Concept Videos
01:26Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
1.8K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
1.8K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.0K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.0K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K
03:02Standard Electrode Potentials
43.7K
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...
43.7K
01:08Electrodeposition
625
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...
Electrodeposition can...
625
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.7K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.7K