 Abstract non-aqua-sodium ion batteries, SIBS, are a promising alternative to traditional lithium ion batteries due to their higher energy density and lower cost. However, the sluggish kinetics and interfacial instability of the positive electrodes have been a major obstacle to their practical application. In this study, researchers developed a new material Na2.26 Fe1.87 SO4-3, which has a unique structure that allows for faster ion transport and improved stability. This material was then used in a battery design that demonstrated excellent performance, including an initial discharge capacity of 83.9 mAh G1, an average cell discharge voltage of 2.35 V, and a specific capacity retention of 97% after 40 cycles at 24 mA G1 and 25 degrees Celsius. This article was authored by Jiyu Zhong, Hong Liangyang, Qin Wang, and others.