| Abstract Scope |
A long pursuit in developing high-energy rechargeable batteries is the prognosis and improvement of structural and (electro)chemical stability at thermally abused and prolonged cell cycling conditions. To design cathodes with higher stability, it is critical to understand the degradation mechanisms and to probe the thermo-chemical interactions inside a battery. Such a study requires a systematic investigation from the structural, chemical, mechanical, and dynamic perspectives at different length scales.
This talk presents a series of discoveries about the degradation in Ni-rich layered oxide, using a combination of X-ray and neutron-based in situ characterization techniques. The importance of thermo-chemical dynamics and heterogeneity at different length scales will be discussed based on these in situ observations. Upon such knowledge, effective strategies to manipulate the interaction dynamics are presented. Therefore, the thermal stability and performance of Ni-rich cathodes can be accurately tailored by rational particle design. |