Gradient cathodes boost stability of Li-rich batteries
Phys.org
February 14, 2026
AI-Generated Deep Dive Summary
A groundbreaking study led by Prof. Zhao Bangchuan from the Institute of Solid State Physics at the Hefei Institutes of Physical Science, Chinese Academy of Sciences, and Prof. Xiao Yao from Wenzhou University, has introduced a composition gradient strategy to enhance the stability of lithium-rich manganese-based cathode materials in batteries. This innovative approach allows precise control over internal stress distribution and electronic structure, significantly improving the performance and longevity of Li-rich batteries. The findings, published in *Nano Letters*, highlight the potential for more stable and efficient energy storage solutions.
Li-rich cathodes are known for their high energy density but often face challenges like structural instability and poor cycling performance due to uneven stress distribution during operation. By implementing a gradient composition strategy, the research team successfully balanced mechanical stress and electronic properties within the cathode material. This method involves creating a gradual variation in the chemical composition across the material, which helps distribute stress more evenly and enhances its overall stability.
The study demonstrates that this gradient approach not only improves structural integrity but also optimizes electronic transport pathways. By tailoring the material's composition to specific regions of the cathode, researchers can address inherent weaknesses in conventional Li-rich materials, such as cracking or delamination caused by mechanical stress during battery operation. This breakthrough could pave the way for next-generation batteries
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Originally published on Phys.org on 2/14/2026