Abstract
AbstractThis publication deals with the influence of the roughnesses of single lithium‐nickel‐manganese‐cobalt‐oxide‐based active material particles on the electrochemical behaviour. A roughness model is used to create particles with a defined roughness depth. Subsequently, comparative calculations are performed using a 3D spatially resolved electrochemical model under different operating conditions. The results show that for small C‐rates below 1C, the usage of the widespread assumption of smooth and spherical active material particles in models is justified. For higher C‐rates, the particle's shape and roughness are not negligible. Small, rough particles show the best performance characteristics for high rate applications. For operation in the diffusion‐limited state (low diffusion coefficient and high C‐rate), the smallest absolute diffusion length represents a better correlation in terms of utilizable capacity compared to the volume‐specific active surface area.
Highlights
Lithium-ion batteries (LIBs) are used as energy storage devices in many portable devices such as smartphones, laptops and power tools
The results show that for small C-rates below 1C, the usage of the widespread assumption of smooth and spherical active material particles in models is justified
It can be seen that as the C-rate increases, the depth of discharge (DOD) decreases until the cut off voltage (COV) at 3.2 V is reached
Summary
Lithium-ion batteries (LIBs) are used as energy storage devices in many portable devices such as smartphones, laptops and power tools. The investigations of Chung et al[22] showed that the surface roughness in real lithium-manganese-oxide electrodes is 2.5 times higher than that of ideally smooth and spherical particles, with the advantage of high available power.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
