This work describes the demonstration of self-healing properties in a Ni-rich NCM cathode. The Ni-rich NCM cathode shows a cyclic degradation rate of 50 mV/h for 500 charge-discharge cycles, with a higher degradation rate of 60 mV/h on the first cycle. The self-healing process is initiated by a softening-induced crack propagation and followed by the healing process of the microstructural damage. The Ni-rich NCM cathode shows an average softening-induced crack propagation rate of 14 m/s, which increases to 29 m/s after the self-healing process. After 1000 charge-discharge cycles the initial and delayed crack growth rates for the self-healing of the NCM cathode is 30 m/s and 2 m/s, respectively. The self-healing process is accelerated to 10 m/s by increasing the number of discharging cycles. This work demonstrates that the Ni-rich NCM cathode can be engineered to self-heal with a heal efficiency reaching 70%. The initial heal efficiency of the NCM cathode with 2% microcapsule content is approximately 3 times higher than that of the neat NCM cathode, and self-healing of the NCM cathode is accelerated by increasing the number of discharging cycles. In this work, the Ni-rich NCM cathode with 2% microcapsule content shows a superior self-healing performance, with a higher heal efficiency and lower initial crack growth rate compared to those of the other Ni-rich NCM cathodes with various microcapsule contents. This is the first work to demonstrate self-healing in a NCM cathode and show that the self-healing process is accelerated by increasing the number of discharging cycles. The present study also demonstrates the importance of the microcapsules in enhancing the self-healing of the NCM cathode. The self-healing NCM cathode displays superior electrochemical performance: high initial specific capacity of 1395 mAh/g for the Ni-rich NCM cathode with 2% microcapsule content versus the Ni-rich NCM cathode without microcapsules, and superior cycling stability over the long-term. The present study shows that the Ni-rich NCM cathode can be engineered to self-heal with a heal efficiency reaching 70% and a superior cycling performance.
Este comic incesto de los Picapiedras es una de las historias más frescas de la serie. No sólo es comic incesto, también es incesto. Yo no lee historias de los picapiedras porque a mi me gusta el porno. Pero este comic es muy bueno y si no te gustan los picapiedras tendrás que aprender a comprar pedos.