Research progress in layered oxides and Prussian blue analogs for sodium ion batteries

Abstract

<p indent="0mm">Due to the consumption of non-renewable resources such as coal and oil, resource shortage and environmental pollution become more and more serious. Among the new secondary batteries, sodium ion battery becomes one of the most promising ones because of its abundant raw materials and low cost. Among the potential cathode materials for sodium-ion batteries, layered transition metal oxides and Prussian blue analoges have been widely studied owing to their diversity of composition, ease of synthesis and high theoretical capacity. However, there are some problems to be solved in the research process of these two kinds of materials, which limits the practicality of the materials. This review summarized the recent progress in improving the capacity of layered transition metal oxide materials and cycle stability for the sodium ion batteries, analyzed the prospects of the material and the research status of Prussian blue analogues, and provided the reference to the research of high-performance anode materials for sodium ion battery and their applications.