Solid-state synthesis of β-NaAlO2 nanoflakes as an anode material for high-performance sodium-ion batteries

New anode materials for sodium-ion batteries are being extensively studied to achieve high stability and long-term cyclability. In this work, we demonstrate the solid-state synthesis of beta-NaAlO2 nanoflakes as a high performance, long-life anode material for sodium-ion batteries (SIBs). The beta-NaAlO2 nanoflakes exhibit a theoretical capacity of similar to 326.69 mA h g(-1). The as-assembled SIB with beta-NaAlO2 as the anode material exhibits an initial discharge capacity of similar to 318 mA h g(-1) at 0.1C-rate (1st cycle). The SIB displays a discharge capacity of similar to 183 mA h g(-1) after 1000 cycles with a coulombic efficiency of 92%. This outstanding performance with the long-term cyclability of the beta-NaAlO2 anode can be ascribed to the Al3+ in the structure that reduces the Jahn-Teller distortion effect during the process of sodiation and desodiation cycles. The good cyclability of the beta-NaAlO2 anode proves it to be a highly stable and cost-effective anode material for high-energy SIBs.

Automated summary

In this work, beta-NaAlO2 nanoflakes were synthesized and demonstrated as a high performance, long-life anode material for sodium-ion batteries. The outstanding performance and excellent cyclability of the beta-NaAlO2 anode make it a highly stable and cost-effective material for high-energy sodium-ion batteries.