| Title: |
A Dry‐Processed Al2O3/LiAlO2 Coating for Stabilizing the Cathode/Electrolyte Interface in High‐Ni NCM‐Based All‐Solid‐State Batteries. |
| Authors: |
Negi, Rajendra S., Yusim, Yuriy, Pan, Ruijun, Ahmed, Shamail, Volz, Kerstin, Takata, Ryo, Schmidt, Franz, Henss, Anja, Elm, Matthias T. |
| Source: |
Advanced Materials Interfaces; Mar2022, Vol. 9 Issue 8, p1-10, 10p |
| Subject Terms: |
SOLID electrolytes, CATHODES, COATING processes, SURFACE coatings, ELECTROLYTES, HEAT treatment, ELECTRIC vehicle batteries, SOLID state batteries |
| Abstract: |
Due to their high theoretical energy densities and superior safety, thiophosphate‐based all‐solid‐state batteries (ASSBs) are considered as promising power source for electric vehicles. However, for large‐scale industrial applications, interfacial degradation between high‐voltage cathode active materials (CAMs) and solid‐state electrolytes (SSEs) needs to be overcome with a simple, cost‐effective solution. Surface coatings, which prevent the direct physical contact between CAM and SSE and in turn stabilize the interface, are considered as promising approach to solve this issue. In this work, an Al2O3/LiAlO2 coating for Li(Ni0.70Co0.15Mn0.15)O2 (NCM) is tested for ASSBs. The coating is obtained from a recently developed dry coating process followed by post‐annealing at 600 °C. Structural characterization reveals that the heat treatment results in the formation of a dense Al2O3/LiAlO2 coating layer. Electrochemical evaluations confirm that the annealing‐induced structural changes are beneficial for ASSB. Cells containing Al2O3/LiAlO2‐coated NCM show a significant improvement of the rate capability and long‐term cycling performance compared to those assembled from Al2O3‐coated and uncoated cathodes. Moreover, electrochemical impedance spectroscopy analysis shows a decreased cell impedance after cycling indicating a reduced interfacial degradation for the Al2O3/LiAlO2‐coated electrode. The results highlight a promising low‐cost and scalable CAM coating process, enabling large‐scale cathode coating for next‐generation ASSBs. [ABSTRACT FROM AUTHOR] |
|
Copyright of Advanced Materials Interfaces is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Complementary Index |
