Sodium-ion batteries are emerging as a promising alternative in the energy storage sector, thanks to researchers like Lunara Rakhymbay in Kazakhstan. As a scientist at Nazarbayev University’s Laboratory of Advanced Materials and Systems for Energy Storage, Lunara is spearheading research into cathode materials for these batteries, aiming to make energy storage more sustainable and affordable.
Lunara’s motivation stems from a desire to address the growing energy needs while tackling climate challenges. “The battery market is expanding rapidly, and it’s exciting to explore sodium-ion batteries as a cost-effective option,” she shares. Sodium stands out due to its abundance and low cost, making it an attractive alternative to lithium, which currently dominates the global battery market.
The Science Behind Sodium-Ion Batteries
Sodium-ion batteries function similarly to Lithium-ion batteries, yet their chemistry differs. During charging, sodium ions migrate from the cathode, pass through an electrolyte, and are stored in the anode. Unlike Lithium-ion batteries that use graphite as the anode material, sodium-ion batteries utilize hard carbon. “In our lab, we synthesize hard carbon from bio-waste like paper and coffee grounds. This approach not only enhances sustainability but also reduces costs,” explains Lunara.
Real-World Applications
While sodium-ion batteries still lag behind Lithium-ion batteries in widespread applications, they are already being used in smaller electric devices like e-bikes and scooters. However, the potential is immense, and researchers like Lunara are keen on scaling these technologies for more demanding applications, such as Electric Vehicles.
“Our materials demonstrate high capacity in lab testing, but my focus now is to advance these findings into practical applications,” Lunara enthuses. She finds it rewarding to see how her lab innovations compete in real-world scenarios, bringing the promise of sodium-ion batteries closer to everyday use.
A Journey of Dedication and Learning
Lunara’s academic journey began with a background in organic chemistry, leading her to pursue a master’s degree and later a PhD in advanced energy storage. Since joining this field in 2018, her work has revolved around developing innovative materials to enhance battery performance. “Switching to energy research was initially challenging, but my chemistry foundation helped me adapt. I encourage everyone to explore new fields—it’s a rewarding journey,” she advises.
Looking ahead, Lunara plans to continue her research on sodium-ion and sodium solid-state batteries. “I aim to collaborate with leading scientists abroad, gaining expertise and publishing impactful research,” she says.
Future of Energy Storage
As the world seeks eco-friendly alternatives, sodium-ion batteries offer a sustainable solution. Lunara’s work adds momentum to this global shift, positioning Kazakhstan as a hub of innovation in energy storage. By leveraging affordable and abundant resources like sodium and bio-waste, her efforts contribute significantly to the pursuit of a greener future.
Through her groundbreaking research and unwavering determination, Lunara Rakhymbay is not only advancing science but also inspiring a new generation of researchers in Kazakhstan and beyond.
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