Researchers Advance Safer, High-Energy Nickel-Based Batteries for Electric Vehicles

A new study outlines a path to overcoming safety and stability challenges in nickel-based cathodes, promising longer EV ranges without compromising safety.

• Scientists from the University of Texas at AustinArgonne National Laboratory conducted over 500 tests on 15 high-nickel cathode materials to address thermal stability issues.
• Nickel-based cathodes offer higher energy density, enabling longer EV driving ranges, but are prone to instability and thermal runaway risks.
• The study introduced a thermal stability index to measure cathode behavior under high-temperature conditions and guide safer battery designs.
• Key factors influencing cathode safety include metal-oxygen bond strength, surface reactivity, nickel content, and crystal size.
• Researchers plan to further explore interactions between nickel-based cathodes and electrolytes to enhance battery performance and safety.

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