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Dual-structure-breaking electrolyte enables practical cadmium-metal battery.
Yang-Feng Cui1, Hao-Bin Song1, Jing-Jing Yao1
1Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore, Singapore.
Nature Communications
|July 2, 2025
Summary
Researchers developed a novel aqueous cadmium-metal battery using a special electrolyte. This design prevents dendrite formation and corrosion, enabling efficient and stable energy storage.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Aqueous metal batteries offer high energy density for next-generation storage.
- Challenges include dendrite formation and corrosion in metal electrodes.
Purpose of the Study:
- To develop a dendrite-free and corrosion-resistant aqueous cadmium-metal battery.
- To enhance charge transfer kinetics and electrode stability.
Main Methods:
- Formulation of a fast-kinetics structure-breaking electrolyte using cadmium chloride (CdCl2) and ammonium chloride (NH4Cl).
- Investigation of the electrolyte's effect on cadmium (Cd) negative electrode behavior.
- Testing battery performance with various positive electrode types.
Main Results:
- The NH4Cl-containing electrolyte induced dual structure breakers (NH4+ and [CdCl4]2-) for improved kinetics.
- Achieved dendrite-free and corrosion-resistant Cd negative electrodes.
- Demonstrated high Coulombic efficiency (99.93%) at 55% Cd utilization.
- Showcased compatibility with diverse positive electrodes, enhancing rate performance and stability.
Conclusions:
- A robust and scalable aqueous battery design for sustainable energy storage.
- The fast-kinetics electrolyte is key to overcoming dendrite and corrosion issues in aqueous metal batteries.
- Promising for practical applications requiring high performance and durability.
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