A new fluoride-containing electrolyte opens up the possibility of creating high-performance and long-lasting batteries

Researchers at the U.S. Department of Energy’s Argonne National Laboratory have discovered a fluorine-containing electrolyte that could dramatically change the performance of future batteries. The new electrolyte could solve the problem of reduced energy density in non-lithium-ion batteries, paving the way for the creation of high-performance, long-life batteries that could power electric cars, long-haul trucks and even airplanes.

The need for more advanced batteries

As the world moves towards a more sustainable future, the demand for more efficient and powerful batteries is greater than ever. Lithium-ion batteries, while widespread, have limitations in terms of energy density. Non-lithium-ion batteries provide double or even more energy in a given volume or mass than lithium-ion batteries, making them an attractive option for electric vehicles and other applications.

However, these batteries suffer from a rapid decrease in energy density with repeated charge and discharge cycles. This limitation prevents their widespread adoption and prevents them from realizing their full potential in addressing climate change.

The role of the fluoride electrolyte

A team at Argonne National Laboratory has focused on improving the performance of lithium-metal batteries, which exhibit high energy density but suffer from the problem of short lifetimes. By changing the composition of the electrolyte, the researchers were able to create a strong protective layer on the surface of the anode that allows hundreds of charge-discharge cycles without significantly degrading performance.

The key to this breakthrough lies in the use of a new fluoride solvent that forms an ionic liquid when combined with a fluorinated component. This ionic liquid is composed of positive and negative ions and provides a stable interface between the anode and cathode, allowing for efficient charge and discharge processes.

Zhengcheng (John) Zhang, team leader in Argonne’s Chemical Sciences and Engineering Division, explains the significance of this discovery, “The key difference in our new electrolyte is the replacement of fluorine atoms with hydrogen atoms in the ring structure of the cationic part of the ionic liquid. This allowed us to maintain high performance over hundreds of cycles in a test lithium metal cell.”

Implications for the future

The development of fluoride electrolyte opens up new possibilities for high-performance and long-lasting batteries. Electric vehicles equipped with such batteries will be able to travel much longer distances, reducing the need for frequent recharging and solving the problem of charge shortages. In addition, the use of such batteries in trucks and long-haul aircraft could revolutionize the transportation industry, paving the way for a greener and more sustainable future.

Experts believe this breakthrough could have a significant impact on the fight against climate change. Dr. Jennifer Pringle, a battery expert from Stanford University, states, “Improving the performance and extending the life of non-lithium-ion batteries is critical to accelerating the adoption of electric vehicles and reducing carbon emissions. The development of a fluoride electrolyte brings us one step closer to achieving this goal.”

With further research and development, fluoride electrolyte could unlock the full potential of non-lithium-ion batteries and revolutionize energy storage.

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