Stanford and SLAC researchers have found a simple manufacturing tweak that could significantly extend the lifespan of lithium-ion batteries.
The team found that changing the way battery cathodes are heated during production greatly reduces internal damage that normally builds up over time.
Their method helped batteries retain nearly 93% of their energy after 500 charging cycles without adding expensive materials or extra production steps.
Simple Heating Change Improves Battery Life
The study focused on nickel-rich layered-oxide cathodes used in powerful lithium-ion batteries. These cathodes are commonly used in systems that require high energy storage, such as data centers and large electrical grids.
READ ALSO: IBM and Team Create New Molecule, Prove Its Existence With Quantum Computer
Researchers said the new process may help improve long-term battery durability while keeping manufacturing costs low.
Cathodes are among the most important components of a lithium-ion battery. Over time, repeated charging and discharging can cause stress within the material. That stress can lead to tiny cracks that slowly weaken the battery and reduce its ability to store energy.
Scientists have spent years trying to solve this issue. Many previous solutions relied on adding coatings or special chemical additives to stabilize the cathode material. While effective, those methods often increase production complexity and cost.
The Stanford and SLAC team chose a different approach. Instead of changing the battery chemistry, they focused on the heating process used to make the cathodes. They discovered that carefully controlling temperature changes during manufacturing produced a stronger, more stable internal structure.
The researchers began the process by heating slowly. After several hours, they rapidly increased the temperature. This combination allowed the materials inside the cathode to react more evenly and prevented the formation of weak internal regions.
The team said this method produced more uniform nanoscale structures. That means the tiny particles inside the battery became more balanced and resistant to damage. As a result, the cathodes showed far fewer cracks after long-term use.
William Chueh, director of the Stanford Precourt Institute for Energy and the SLAC-Stanford Battery Center, said the results matched some of the best energy retention levels reported for similar batteries.
WATCH ALSO: US Air Force’s Sentinel missile brings improved range, accuracy, resiliency and flexibility
He said the process improves performance without adding manufacturing costs. Researchers believe this could make the technique attractive for large-scale battery production.
The findings were published in the journal Nature Energy. The paper explained how faster heating improved the distribution of molten lithium hydroxide around nickel-rich particles during synthesis. That even distribution reduced stress inside the material during battery operation.
Why Lithium-Ion Batteries Crack Over Time
Lithium-ion batteries store and release energy by moving lithium ions between electrodes. During repeated charging cycles, the cathode expands and contracts slightly. Over time, those movements create strain that damages the material.
Nickel-rich cathodes are especially important because they store more energy than many other battery materials. However, they are also more vulnerable to cracking and degradation. This tradeoff has remained a major challenge for battery developers.
The researchers studied how cathodes form during manufacturing. To make the material, companies heat lithium hydroxide together with nickel-rich precursor particles. During traditional slow heating, the reaction happens unevenly inside the particles.
Some regions react earlier than others. This creates differences in internal stress levels. Eventually, those uneven stresses lead to fractures that spread through the cathode structure.
Donggun Eum, a postdoctoral researcher at Stanford and SLAC, said the heating step proved crucial. He explained that the faster rate of temperature increase improved the spread of molten lithium around the particles. That created a more consistent internal structure and reduced long-term damage.
The team used several advanced imaging techniques to observe the process in detail. Researchers at Brookhaven National Laboratory used transmission X-ray microscopy to track how the materials changed during heating.
READ ALSO: YouTuber Built a 3D-Printed Fiberglass Dive Helmet and It Actually Works
Scientists at SLAC’s Stanford Synchrotron Radiation Lightsource also monitored structural and chemical changes using X-ray spectroscopy and diffraction tools.
These observations showed how the layered cathode structure evolved under different heating conditions. The researchers found that gradual decomposition followed by faster heating produced the most stable structure. This method prevented the formation of porous defects and improved particle strength.
Hari Ramachandran, a former Stanford graduate student and co-author of the study, said the industry has long treated cathode cracking as an unavoidable problem. He said the new process demonstrates that manufacturers can improve battery durability using existing materials and equipment. That may help companies avoid costly redesigns.
Impact on Energy Storage and Electric Systems
Longer-lasting batteries are becoming increasingly important across many industries. Data centers, renewable energy systems, and electric transportation networks all rely heavily on lithium-ion technology. Improving battery lifespan can reduce replacement costs and lower long-term waste.
Grid-scale energy storage has become especially important as countries expand solar and wind power generation.
Renewable energy systems often require large batteries to store electricity when production is high and release it later when demand rises. Longer-lasting batteries can make those storage systems more affordable and reliable.
Battery durability also affects consumer electronics and medical devices. Phones, laptops, and portable tools lose capacity over time because battery materials slowly degrade. A manufacturing method that reduces internal cracking may eventually improve battery lifespan across many products.
The new technique may also benefit electric vehicle development. Carmakers continue searching for batteries that provide a longer range and maintain performance for many years. Improving cathode stability can help support those goals while controlling production costs.
The researchers plan to test the process in industrial-scale furnaces next. They also want to apply the same heating strategy to other cathode chemistries used in modern batteries. If successful, the approach may become a new standard for manufacturing advanced lithium-ion materials.
WATCH ALSO: This US supersonic aircraft could slash flight times and silence the sonic boom
Several institutions contributed to the project. Researchers from the University of Texas at Austin, Korea University, Kyungpook National University, and the Research Institute of Industrial Science and Technology participated in the study. Additional microscopy work was carried out at Korea’s Pohang Light Source II facility.
The research received support from the California Research Alliance, the US Air Force Office of Multidisciplinary University Research Initiative, and the US Department of Energy.
The work also used facilities at Brookhaven National Laboratory and SLAC National Accelerator Laboratory. Both facilities are part of the Department of Energy’s Office of Science network.
The findings arrive at a time when global demand for energy storage is growing rapidly. Battery manufacturers are under pressure to improve performance while lowering costs and extending lifespan.
The Stanford and SLAC study shows that even small changes in production methods may play a major role in shaping the next generation of lithium-ion batteries.
