The global shift to electric vehicles (EVs) is accelerating, but the extraction of battery materials significantly impacts the environment and incurs high costs. Now, two groundbreaking studies led by McGill University researchers promise to revolutionize the manufacturing of lithium-ion batteries, making them cheaper and more environmentally friendly.
Advancing Sustainable Battery Materials
The research highlights the potential of disordered rock-salt-type (DRX) cathode materials, which could be pivotal in producing sustainable and cost-effective batteries.
Iron-Based Cathodes: A Major Breakthrough
In the first study, engineering researchers, including lead author Richie Fong, a Ph.D. student in Materials Engineering, focused on cathodes—the most expensive battery component traditionally made from unsustainable metals like cobalt and nickel. Iron presents a cheaper alternative, but existing iron-based cathodes have lacked the storage capacity required for long-range EVs.
Published in Advanced Energy Materials, the study challenges this limitation. The researchers engineered iron-based DRX cathodes by modifying the electron storage process, achieving unprecedented storage capacity for iron-based cathode materials. This innovation could reduce lithium-ion battery costs by 20%.
Manganese-Based Cathodes: Overcoming Practical Challenges
The second study, published in Energy & Environmental Science and led by Prof. Jinhyuk Lee, Assistant Professor in the Department of Mining and Materials Engineering and a William Dawson Scholar, explored manganese-based disordered rock-salts (Mn-DRX). Although Mn-DRX offers high energy content at a low cost, its practical application has been hindered by low electrical conductivity and structural instability.
In collaboration with scientists from the Korea Advanced Institute of Science and Technology, the team found a novel solution. By incorporating multiwalled carbon nanotubes and an adhesive binder as electrode additives, they achieved the highest practical-level energy density ever recorded for Mn-DRX cathodes.
Promising Future for Lithium-Ion Batteries
"Our findings hold immense promise for the future of lithium-ion battery development, offering a pathway towards more affordable and sustainable energy storage solutions," explains Prof. Lee. An industry partner is already collaborating with the researchers to bring these innovations to market, potentially transforming the EV industry.
This breakthrough in battery technology not only paves the way for greener and more affordable electric vehicles but also represents a significant step forward in sustainable energy storage solutions.
More: https://techxplore.com/news/2024-05-battery-breakthrough-usher-greener-cheaper.html
