Lithium EV batteries get new life with 12,000 more cycles using China’s new injections
Researchers at the Fudan University in China have developed a method to extend the lifespan of lithium-ion batteries.
A multi-institutional team of Chinese chemists, molecular engineers, and materials scientists collaborated to make this transformative discovery. Their research was recently published in Nature under the title “External Li Supply Reshapes Li-Deficiency and Lifetime Limit of Batteries.”
Limitations of lithium-ion batteries
Lithium-ion batteries contain four main components: a cathode, an anode, a separator, and an electrolyte filled with lithium ions. During normal operation, lithium ions move between the cathode and anode, transferring energy.
Over time, some lithium ions form deposits, creating what scientists call “dead lithium.” This accumulation reduces the concentration of lithium ions in the electrolyte, gradually diminishing the battery’s capacity to hold a charge. Once capacity drops below 80% of its original value, the battery is considered unusable.
To solve this issue, researchers approached battery degradation as a treatable condition. Through extensive experimentation, researchers found that battery degradation mirrors the progression of a disease, where a key component deteriorates while the rest of the system remains functional.
By identifying and addressing the malfunctioning component, they developed a method to restore depleted batteries to full functionality. This insight led to the development of specialized materials that restore lost lithium ions, effectively extending battery lifespan and improving performance.
A game-changing battery restoration technique
The researchers describe their accomplishment as a major challenge, requiring the development of a carrier molecule capable of being injected into a failing battery. This molecule had to meet several strict criteria, including the ability to dissolve in the existing electrolyte without disrupting the battery’s function. Additionally, it needed to be highly compatible with all other battery materials.
To identify a suitable candidate, the team utilized an AI-driven application trained on digitized molecular properties. Their search led them to LiSO₂CF₃, a molecule that not only met all compatibility requirements but was also relatively inexpensive to produce and suitable for nearly all commercially available batteries.
The rejuvenation process itself is simple – batches of the molecule are injected into the region where the battery’s active lithium ions reside. This process releases a small amount of gas, after which the battery becomes ready for recharging.
Testing demonstrated a dramatic improvement in battery lifespan, increasing the average cycle count from 1,500 to 12,000. This advancement not only enhances battery performance but also helps reduce environmental pollution by decreasing the number of discarded batteries.
A leap towards sustainability
The impact of this discovery goes beyond scientific innovation, offering real-world benefits in the push for sustainable energy. As electric vehicles and renewable power systems gain traction, the ability to restore lithium-ion batteries could drive significant environmental and economic advantages.
By extending battery longevity and reducing the need for constant replacements, this advancement could play a crucial role in minimizing electronic waste. Moreover, enhanced battery efficiency could lead to more reliable and cost-effective energy storage solutions across multiple industries.
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This breakthrough sets the stage for new possibilities in battery technology. As the demand for efficient energy storage continues to rise, refining and expanding rejuvenation methods could be instrumental in shaping a cleaner, more sustainable future, according to the study.
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Lithium EV batteries get new life with 12,000 more cycles using China’s new injections, source
