2 research outputs found
Exploring the Synergistic Effects of DualâLayer Electrodes for High Power LiâIon Batteries
Abstract The electrification of the transport sector has created an increasing demand for lithiumâion batteries that can provide high power intermittently while maintaining a high energy density. Given the difficulty in designing a single redox material with both high power and energy density, electrodes based on composites of several electroactive materials optimized for power or capacity are being studied extensively. Among others, fastâcharging LiFePO4 and high energy Li(NixMnyCoz)O2 are commonly employed in industrial cell manufacturing. This study focuses on comparing different approaches to combining these two active materials into a single electrode. These arrangements were compared using standard electrochemical (dis)charge procedures and using synchrotron Xâray fluorescence to identify variations in solution concentration gradient formation. The electrochemical performance of the layered electrodes with the highâpower material on top is found to be enhanced relative to its blended electrode counterpart when (dis)charged at the same specific currents. These findings highlight dualâlayer lithiumâion batteries as an inexpensive way of increasing energy and power density of lithiumâion batteries as well as a model system to study and exploit the synergistic effects of blended electrodes
Exploring the Synergistic Effects of DualâLayer Electrodes for High Power LiâIon Batteries
Abstract Invited for this issue's Front Cover are the group of Prof. Janine Mauzeroll and Prof. Steenâ
B. Schougaard. The front cover picture shows Liâmetal cells which contain two active materials (red and blue). The cell on the left has both materials intermixed (blended electrode), while the cell on the right has them segregated (dualâlayer electrode). The brightness emitted by the bulbs, the position on the scale, and the distribution of Li+ in the liquid phase (green orbs) reflects the highâpower capabilities of the dualâlayer architecture. Cover design by Jeremyâ
I.â
G. Dawkins, Janine Mauzeroll and Steenâ
B. Schougaard. Read the full text of the Research Article at 10.1002/celc.202300279