New breakthrough in lithium batteries! Cycle life is expected to be significantly improved!
By Helen
May 27th, 2024
822 views
Recently, the team of Professor Marnix Wagemaker of Delft University of Technology in the Netherlands collaborated with the neutron scattering team of the Institute of Nuclear Physics of the Institute of Atomic Energy of China National Nuclear Corporation to publish the latest research results in the field of lithium-ion batteries in the internationally authoritative journal Nature. This achievement may significantly improve the cycle life and fast charging performance of lithium batteries, marking important progress in the full opening and application of the China Advanced Research Reactor, a major scientific research facility of CNNC.
The research focuses on ordered layered oxides, which are currently one of the most important cathode materials in lithium-ion batteries. During deep charging, the structural framework is susceptible to lattice stress, structural or mechanochemical degradation, causing the battery capacity to drop dramatically, resulting in shortened battery life.
To this end, Professor Wagemaker's team, together with the Institute of Atomic Energy of China National Nuclear Corporation and other units, proposed a solution that successfully introduced chemical short-range disorder (CSRD) into the oxide cathode and precisely adjusted the distribution of lithium and cobalt elements in the crystal lattice. The domain distribution spans the distance between several nearest neighbor grid points, thereby significantly improving the cycle life and fast charging performance of lithium batteries. The study used neutron powder diffraction technology to obtain the distribution characteristics of lithium and cobalt elements, and found that approximately 2.6% of cobalt ions are located in the lithium layer, providing key evidence to prove the CSRD structure.
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