1 research outputs found
Interface and Electrode Microstructure Engineering for Optimizing Performance of the LiNiO<sub>2</sub> Cathode in All-Solid-State Batteries
Solid-state batteries (SSBs) utilizing superionic thiophosphate
solid electrolytes (SEs), such as argyrodite Li6PS5Cl, are attracting great interest as a potential solution
for safe, high-energy-density electrochemical energy storage. However,
the development of high-capacity cathodes remains a major challenge.
Herein, we present an effective design strategy to improve the cyclability
of the layered Co-free oxide cathode active material (CAM) LiNiO2, consisting of surface modification and electrode microstructure
engineering. After optimization, the SSB cells were found to deliver
high capacities (qdis ≈ 200 mAh/gCAM) and to cycle stably for hundreds of hours. A combination
of operando and ex situ characterization techniques was employed to
reveal the mechanism of optimization in overcoming several issues
of LiNiO2, including poor SE compatibility, outgassing,
and state-of-charge heterogeneity. Tailoring the microstructure of
the composite cathode and increasing the CAM|SE interface stability
enable superior electrochemical performance