Research Progress of Metal Catalysts for Room Temperature Sodium-sulfur Battery Cathode
The room temperature sodium-sulfur(RT-Na-S)battery has a high theoretical energy density of 1 274 Wh·kg-1,and sulfur and sodium as active materials have many advantages including abundant reserves and low prices,Therefore,it is regarded as a new generation of energy storage equipment with great development prospects.However,the shuttle effect of soluble sodium polysulfides and their retarded conversion kinetics seriously hinder the practical application of RT-Na-S batteries.The metal catalyst have excellent electrical conductivity,and can chemically anchor sodium polysulfide by metal-S bond,inhibit their diffusion,and simultaneously promote the reaction kinetics,thus improving the performance of battery.In this paper,the working mechanism of RT-Na-S battery in ether/ester based electrolyte was first introduced,and the typical application cases of metal catalysts in the field of RT-Na-S battery cathode in recent years were summarized based on the order of metal nanoparticles/clusters and single atoms.Then,the synthesis methods and catalytic mechanism of functional metal catalyst as host materials were reviewed.At last,the challenges and improvement trends of metal catalysts used in room temperature sodium-sulfur batteries were provided.It is no doubt that this paper can offer useful reference cases and theoretical basis for the development of RT-Na-S battery.
room temperature sodium-sulfur batterymetal catalystsmetal nanoparticlesclusterssingle atoms
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