In situ implanting MnO nanoparticles into carbon nanorod-assembled microspheres enables performance-enhanced room-temperature Na–S batteries

Abstract

The accomplishment of high-performance room-temperature sodium-sulfur (RT Na-S) batteries necessitates multifunctional sulfur electrodes via decent materials design strategies, since they are suffering from a series of critical challenges from S...

Double design of host and guest synergistically reinforces the Na-ion storage of sulfur cathodes

“…, I D / I G ). 29,30 The calculated I D / I G ratio value of 0.90 indicates the partially graphitized amorphous nature of the carbon skeleton, enabling fast electron transport in the electrochemical process. 29…”

“…[25][26][27][28] Besides this, the intensity ratio of the two constant dominant peaks located at 1359 and 1594 cm −1 (D band and G band) indicates the graphitization degree of the carbon skeleton (i.e., I D /I G ). 29,30 The calculated I D / I G ratio value of 0.90 indicates the partially graphitized amorphous nature of the carbon skeleton, enabling fast electron transport in the electrochemical process. 29 The porosity of the host materials usually plays a vital role in conning the dissolution of soluble species and alleviating the dramatic expansion of active materials.…”

Insights into the Dynamic Evolution of Defects in Electrocatalysts

“…[5][6][7] The physicochemical properties of catalytic materials, especially the surface interface properties, are the key factors to regulate the adsorption and desorption process of the reaction species. [8][9][10] The design and regulation of the crystal structure, surface atomic arrangement, and surface interface properties of catalysts, and the study of the structure-activity relationship between catalysts and reactions are the core issues in the study of heterogeneous catalysis. [11] In recent decades, with the development of catalysis, people have carried out a lot of research in catalytic materials of synthesis and the structure-activity relationship between activity and structure aspect, and a lot of important progress has been made, mainly through the regulation of material surface atoms and the stress, heteroatom doping, and surface microenvironment of strategies to promote the catalytic reaction.…”

Dredging sodium polysulfides using a Fe3C electrocatalyst to realize improved room-temperature Na–S batteries

“…7,8 Research efforts in the last decade have showcased that the physical confinement of NaPSs from the porous structures of carbon materials and/or chemical capture at sulfiphilic sites can suppress the shuttle effect of NaPSs by different degrees (i.e., blocking strategy). [9][10][11][12] These sulfiphilic sites can typically come from transition metal nanoparticles/clusters, [13][14][15] transition metal oxides, [16][17][18] transition metal carbides, 19,20 transition metal phosphides, 21 and transition metal nitrides. [22][23][24] However, physical confinement based on weak van der Waals forces cannot completely circumvent the dissolution and shuttling of NaPSs and very strong chemical immobilization at sulfiphilic sites often leads to the generation of "dead S", as observed in most of the polar but nonconductive transition metal oxides.…”

“…, blocking strategy). 9–12 These sulfiphilic sites can typically come from transition metal nanoparticles/clusters, 13–15 transition metal oxides, 16–18 transition metal carbides, 19,20 transition metal phosphides, 21 and transition metal nitrides. 22–24 However, physical confinement based on weak van der Waals forces cannot completely circumvent the dissolution and shuttling of NaPSs and very strong chemical immobilization at sulfiphilic sites often leads to the generation of “dead S”, as observed in most of the polar but nonconductive transition metal oxides.…”