Recent advancements in energy storage technology have taken a significant leap forward with the introduction of a novel bimetallic cation-enhanced gel polymer electrolyte (Ni/Zn-GPE) designed for aqueous zinc-ion batteries (AZIBs). This innovative approach addresses two critical challenges: low ionic conductivity at subzero temperatures and the problematic formation of dendrites during battery operation, both of which have hindered the widespread adoption of AZIBs in grid-scale applications.
The research, led by Yanlu Mu from the School of Chemistry and Chemical Engineering at the University of Jinan in China, showcases how the Ni/Zn-GPE disrupts the hydrogen-bonding network of water, effectively lowering the electrolyte’s freezing point. This breakthrough results in an impressive ionic conductivity of 28.70 mS cm−1 at -20°C. As Mu explains, “Our electrolyte not only improves performance in low temperatures but also enhances the overall safety and longevity of the battery system.”
This development could have substantial implications for the construction sector, where energy storage solutions are crucial for integrating renewable energy sources into building designs. With the increasing push for sustainability, the ability to utilize AZIBs that maintain efficiency even in frigid conditions could enable construction projects to harness solar or wind energy more effectively. The longevity of these batteries—demonstrated by over 2700 hours of reversible cycling at 5 mA cm−2—suggests that they could provide a reliable energy source for smart buildings and infrastructure, reducing reliance on traditional energy grids.
Furthermore, the research highlights how Ni2+ ions create an electrostatic shielding interphase on the zinc surface, which confines the deposition of zinc to the favorable Zn (002) crystal plane. This process not only prevents dendrite formation but also mitigates side reactions, enhancing the battery’s overall efficiency. The Zn || V2O5 battery retains 85.3% capacity after 1000 cycles at -20°C, showcasing its potential for long-term use in various applications.
As the construction industry increasingly seeks innovative solutions to meet energy demands sustainably, the findings from Mu and his team could pave the way for the next generation of energy storage technologies. The ability to deploy effective energy systems in challenging climates would not only improve energy resilience but also support the transition towards greener building practices.
This research, published in ‘InfoMat’—translated as “Information Materials”—marks a significant step forward in the development of low-temperature resistant energy storage solutions. For more information about Yanlu Mu’s work, you can visit lead_author_affiliation.
