In these devices, the battery’s membrane must be selective and long-lived. It needs to allow target ions to move between compartments, while blocking other species from crossing and degrading performance. Achieving both high conductivity and low permeability over years is a persistent materials challenge.

Geoffrey M. Geise, an associate professor of chemical engineering at the University of Virginia, co-leads a research effort aimed at patenting one of the early membrane designs engineered for long service life. The approach targets a core performance trade-off in ion transport: improving ion conduction often risks increasing unintended passage of other components.

Geise’s work earned him the 2026 Permeance Prize for Mid-Career Excellence from the North American Membrane Society (NAMS). In his view, the recognition reflects years of collaborative progress within membrane science and technology.

Technically, the lab’s membranes function like selective filters. They separate minerals, ions, or drug-relevant molecules by leveraging differences in size, charge, and transport behavior across polymer layers. To do this reliably, researchers must understand how chemical interactions and mechanical stability shape ion pathways through polymer structures.

A key part of Geise’s impact stems from elucidating how polymer chemistry influences transport. Earlier work helped articulate a trade-off relevant to desalination: increasing salt selectivity can reduce water permeability. That insight has informed membrane design strategies for purification systems.

More recently, the group has advanced molecular-level understanding of ion–polymer interactions using dielectric relaxation spectroscopy. By probing how charges and molecules behave inside materials, the technique provides data that supports modeling of candidate membranes—an advantage when more conventional methods fail.

Geise also extends membrane expertise beyond energy storage, including work on extracting lithium from salt brines, a resource critical for batteries but dominated by foreign supply chains. Mentors and colleagues highlight that his research philosophy centers on enabling other engineers—especially students—to develop scalable technologies grounded in fundamental transport science.

The Permeance Prize will be presented at ICOM 2026, the International Congress on Membranes and Membrane Processes, hosted by NAMS in July.

Subject of Research: Long-lived selective ion membranes for energy and separations (non-aqueous redox flow batteries, desalination, ion transport).
Article Title: NAMS Permeance Prize Honors UVA Membrane Scientist for Long-Lived, Conductive, Low-Permeability Membrane Design
News Publication Date: 2026
Web References: https://engineering.virginia.edu/faculty/geoff-geise ; https://engineering.virginia.edu/news-events/news/big-renewable-energy-sources-need-big-energy-storage-solutions-uva-researchers-show-way ; https://www.membranes.org/icom2026
References: Published research in Journal of Membrane Science (2024) and related UVA and journal materials cited by the original announcement.
Image Credits: UVA School of Engineering and Applied Science

Keywords

membranes; ion transport; dielectric relaxation spectroscopy; polymer selectivity; redox flow batteries; non-aqueous electrolytes; desalination; permeability–conductivity trade-off; scalable energy storage

The use of aluminum as an anode in batteries presents numerous advantages, including its abundance, low cost, and high energy density. However, one of the significant challenges faced by aluminum-based batteries is the anode’s tendency to degrade over time, resulting in diminished performance and ultimately limiting their commercial viability. In this context, deep eutectic solvents have gained attention due to their unique properties that promise to mitigate these instabilities and enhance the overall operational lifespan of aluminum anodes.

Deep eutectic solvents (DES) are a novel class of electrolytes formed by mixing a hydrogen bond donor and a hydrogen bond acceptor. This mixture leads to a significant reduction in melting point, resulting in a liquid phase that exhibits exceptional ionic conductivity. The study by Guo and colleagues highlights how the incorporation of deep eutectic electrolytes can help stabilize aluminum anodes, particularly under the harsh operational conditions typical of rechargeable batteries.

The research team meticulously analyzed the interaction between the deep eutectic electrolytes and the aluminum anode, observing that the electrolyte formed a protective layer on the anode surface. This layer effectively reduced corrosion and side reactions that typically lead to capacity fading in aluminum batteries. The authors provided extensive experimental data to support their claims, showcasing enhanced stability and performance metrics compared to conventional electrolytes.

Among the various formulations tested, the team discovered that specific deep eutectic mixtures not only improved the aluminum anode’s performance but also possessed a wide electrochemical stability window. This characteristic is particularly essential, as stability across a broader range of voltages and temperatures is crucial for real-world applications. The results indicate that these advanced electrolytes can withstand the stresses encountered during charge and discharge cycles more effectively than traditional solutions.

In light of these findings, the researchers envision a new era of aluminum-based batteries that could potentially offer higher energy densities and longer lifespans. With consumption of lithium being a critical issue due to its environmental implications and limited reserves, aluminum batteries based on these innovative electrolytes present a compelling alternative. This makes their research not only timely but also incredibly relevant in the context of global energy demands and sustainability.

The extensive tests carried out by Guo and his team revealed a marked improvement in the coulombic efficiency of the aluminum anode when deep eutectic electrolytes were employed. Specifically, coulombic efficiency is a vital metric that measures how effectively a battery converts the energy provided into usable output. Higher efficiency implies a reduction in energy losses, resulting in longer-lasting and more reliable battery performance—a crucial factor for both consumer electronics and electric vehicles alike.

Moreover, the study underscores the versatility of deep eutectic electrolytes, as they can be synthesized from non-toxic and affordable precursors. This aligns perfectly with the growing call for greener technologies within the battery sector. As industries strive to reduce their carbon footprint, the development and commercialization of these sustainable electrolytes could mark a significant step forward in the pursuit of eco-friendly energy storage solutions.

While the findings are promising, the authors acknowledge that further investigations are required to fully understand the underlying mechanisms at play. Exploring the long-term electrochemical stability and performance degradation pathways will be essential. Nevertheless, the work of Guo and colleagues provides a solid foundation for future research in this domain.

As the battery technology landscape continues to evolve, the study highlights the importance of cross-disciplinary approaches that integrate chemistry, materials science, and engineering. Collaborations between academic institutions and industry partners will be vital as efforts accelerate towards the practical application of these findings. The scalability of production processes for deep eutectic electrolytes will be another hurdle to overcome, ensuring that they can be manufactured cost-effectively and in sufficient quantities for commercial use.

In conclusion, the innovative research carried out by Guo, Zhang, and Liu represents a significant advancement in the field of battery technology, specifically regarding the aluminum metal anode. The introduction of deep eutectic electrolytes delineates a new path towards overcoming long-standing challenges in battery stability and efficiency. Consequently, it opens up exciting possibilities for the development of next-generation energy storage systems that promise to be both economically viable and environmentally friendly, reaffirming the critical role of scientific research in driving technological innovation.

As the global community continues to transition towards renewable energy sources, advancements such as those presented in this study will not only support this shift but also contribute to more sustainable energy practices worldwide. Ultimately, the research serves as a beacon of hope, signifying that through dedicated inquiry and innovation, solutions to some of our most pressing energy challenges may be on the horizon.

Subject of Research: Deep eutectic electrolytes to improve the stability of aluminum metal anodes.

Article Title: Deep eutectic electrolyte improves the stability of aluminium metal anode.

Article References:

Guo, X., Zhang, Z. & Liu, S. Deep eutectic electrolyte improves the stability of aluminium metal anode.
Ionics (2025). https://doi.org/10.1007/s11581-025-06594-6

Image Credits: AI Generated

DOI: https://doi.org/10.1007/s11581-025-06594-6

Keywords: Aluminum, deep eutectic electrolyte, battery stability, energy storage, sustainable technology.