Summary
- Norwegian researchers are working to improve the resilience of electric vehicle battery cells
- They are exploring ways to keep batteries working with minor damage to avoid costly replacements
- Silicon anode technology offers more energy density and range but faces challenges like swelling during charging and discharging
- Researchers are adding more graphite and developing special electrolytes to protect the electrodes
- Other experiments focus on using binders and separators to maintain electrode structure and prevent short circuits, especially as EVs shift to cell-to-pack technology
Article
The research team at the Norwegian University of Science and Technology (NTNU) is working on ways to make electric vehicle battery cells more resilient as part of an EU-funded project. They are focusing on silicon-anode technology, which offers higher energy density and range but faces challenges such as swelling during charging and discharging, leading to breakdown over time. To address this issue, researchers have experimented with adding more graphite to create a stable mix and have developed a specialized electrolyte to protect both the cathode and anode.
In addition to working on the silicon-anode technology, the research team has been looking at the addition of binders and separators to the battery cell. The binders help maintain the structure of the electrodes even if they become damaged, while the separators keep the cathode and anode physically apart to prevent short circuits. These features are becoming increasingly important as cell-to-pack technology becomes more common in electric vehicles, allowing for the replacement of individual battery modules without the need to remove the entire pack. Some automakers are also exploring innovative methods, such as Ford’s proposal to replace battery modules while keeping the pack in place.
While the use of electrode binders may be beneficial in current battery cell technology, it is unclear whether such strategies will be effective in future solid-state cells as the industry transitions in that direction. Solid-state batteries offer advantages such as increased energy density, faster charging times, and improved safety compared to traditional lithium-ion batteries. Researchers and manufacturers are working to overcome challenges in scaling up production and addressing cost considerations to make solid-state batteries a viable option for electric vehicles in the future.
The development of more resilient battery cells is crucial for the widespread adoption of electric vehicles and the transition to a sustainable transportation system. Improving the durability and reliability of battery technology will help reduce costs associated with battery replacement and maintenance, making electric vehicles more accessible to consumers. As the demand for electric vehicles continues to grow, research efforts focused on enhancing battery performance and longevity will be instrumental in advancing the electrification of the automotive industry.
Collaboration between battery suppliers, researchers, and academic institutions is essential for driving innovation in electric vehicle battery technology. By pooling resources and expertise, stakeholders can accelerate the development of next-generation battery cells that are more efficient, durable, and cost-effective. Continued investment in research and development in the field of energy storage will be critical for achieving the goals of decarbonization and reducing greenhouse gas emissions in the transportation sector.
Overall, the research being conducted by the NTNU team and their collaborators highlights the importance of addressing the technical challenges related to electric vehicle battery cells to ensure their long-term performance and reliability. By implementing innovative solutions such as electrode binders and specialized electrolytes, researchers are working towards extending the lifespan of batteries and improving their overall efficiency. These advancements will play a key role in supporting the transition to electric mobility and reducing the environmental impact of the transportation industry.
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