Statistical approach to design Zn particle size, shape, and crystallinity for alkaline batteries
image: Scanning electron microscopy (SEM) images of spherical particles representing the 4 size ranges
Credit: Brian Lenhart, Devadharshini Kathan, Valerie Hiemer, Mike Zuraw, Matt Hull & William E. Mustain.
Researchers from the University of South Carolina and Duracell have developed a statistical method to optimize zinc particle size, shape, and crystallinity, potentially enhancing the performance and longevity of alkaline batteries. This breakthrough, detailed in ENGINEERING Energy (formerly Frontiers in Energy), promises to revolutionize zinc anode design.
Alkaline batteries, widely used in portable electronics, are often limited by the performance of their zinc anodes. Traditionally, the development of zinc powders has relied on trial-and-error methods, which are inefficient and inconsistent. The need for a systematic approach to optimize zinc powder properties is crucial to improving battery performance and lifespan.
The researchers conducted a detailed factorial analysis of various zinc particle types, characterized by different shapes (spherical, tubular, flat, and irregular), sizes, and crystallinity levels. They discovered that zinc crystallinity significantly impacts corrosion resistance, while smaller particle sizes and varied shapes enhance capacity. The optimized zinc particles demonstrated reduced corrosion and improved capacity in both powder and slurry forms.
The study employed a 64-powder type factorial design, analyzing zinc particles in both powder and slurry forms. Using advanced statistical tools, the team identified the most significant factors affecting performance, subsequently testing the optimized particles in AA-equivalent cylindrical cells.
This research provides actionable insights for battery manufacturers, offering a path to produce more stable and high-energy-density cells. The findings could lead to significant advancements in battery technology, impacting various industries reliant on portable power sources.
Future research will explore the integration of this optimized zinc powder into commercial battery production.
JOURNAL: ENGINEERING Energy (formerly Frontiers in Energy)
Sharable link: https://rdcu.be/eQ3YK
Article Link:
https://link.springer.com/article/10.1007/s11708-024-0904-1
https://journal.hep.com.cn/fie/EN/10.1007/s11708-024-0904-1
Cite this article
Lenhart, B., Kathan, D., Hiemer, V. et al. Statistical approach to design Zn particle size, shape, and crystallinity for alkaline batteries. Front. Energy 18, 650–664 (2024). https://doi.org/10.1007/s11708-024-0904-1