Three-Dimensional (3D) Ordered Macroporous Bimetallic (Mn,Fe) Selenide/Carbon Composite with Heterojunction Interface for High-Performance Sodium Ion Batteries

Abstract

Transition-metal selenides have captured significant research attention as anode materials for sodium ion batteries (SIBs) due to their high theoretical specific capacities and excellent electronic conductivity. However, volumetric expansion and inferior cycle life still hinder their practical application. Herein, a three-dimensional (3D) ordered macroporous bimetallic (Mn,Fe) selenide modified by a carbon layer (denoted as 3DOM-MnFeSe x @C) composite containing a heterojunction interface is fabricated through selenizing a 3D ordered macroporous Mn-based Prussian Blue analogue single crystal. The 3DOM-MnFeSe x @C exhibits hierarchically porous architecture with enhanced mass-transfer efficiency; MnSe and FeSe 2 particles are encapsulated into macroporous carbon framework, which can significantly promote the electronic conductivity and maintain the structural integrity. The density functional theory calculation indicates that the heterojunction interface between MnSe and FeSe 2 has been successfully engineered so that Na + can be readily adsorbed and rapidly converted, thus promoting the reaction kinetics and extending the cyclic life. As expected, the 3DOM-MnFeSe x @C composite delivers excellent rate performance (277.6 mA h g −1 at 10 A g −1 ), and prolonged cycling life (191.6 mA h g −1 even after 1000 cycles at 2 A g −1 ) as a sodium storage anode. The sodium storage mechanism of the composite was further investigated by in situ X-ray diffraction and ex situ high-resolution transmission electron microscopy characterization techniques.

Towards metal selenides: a promising anode for sodium-ion batteries

“…However, current research indicates that the majority of these low-cost metal selenides necessitate multi-step synthesis or solution-based techniques, often supplemented with modification approaches to enhance performance. 50,68–70 Consequently, additional research efforts will be directed toward addressing these challenges in the future.…”

Architectural Decoration of Bioleached NiFeP Surfaces by Co3O4 Flowers for Efficient Electrocatalytic Hydrogen Generation

“…3D porous metallic structures are known to be highly compatible in the field of electrocatalysis owing to their flexible porous morphology and effect amidst the heteroatoms. Designing a 3D ordered hierarchical structure could provide rich internal space and large surface area, which is conducive for rapid mass transfer and improved reaction kinetics. , Thus, heterogeneous nickel-based bimetallic phosphides with a 3D structural design are essential for developing competent electrocatalysts for HER. However, modulating the requisite catalytic characteristics by the synergism of 3D patterned structures and further introduction of heteroatoms is still challenging.…”

Evoking C2+ production from electrochemical CO2 reduction by the steric confinement effect of ordered porous Cu2O

“…, mesoporous silica and carbon) 13,19–22 and colloidal crystals ( e.g. , polystyrene and silica spheres), 20,23–29 has been the most extensively explored method for fabricating 3DOP materials. Despite significant efforts in this area, it remains a substantial challenge to achieve precise control over the nanoarchitectures within the templates to create 3DOP materials, especially for those beyond the well-studied silica-, carbon- and metal–organic framework (MOF)-based materials.…”

“…Three-dimensional ordered porous (3DOP) materials, characterized by their well-dened pore arrangements, tunable pore sizes, and smooth mass transfer of the 3D interconnected pore channels, have demonstrated remarkable catalytic performance. [13][14][15][16][17][18][19] Employing hard templates, including mesoporous materials (e.g., mesoporous silica and carbon) 13,[19][20][21][22] and colloidal crystals (e.g., polystyrene and silica spheres), 20,[23][24][25][26][27][28][29] has been the most extensively explored method for fabricating 3DOP materials. Despite signicant efforts in this area, it remains a substantial challenge to achieve precise control over the nanoarchitectures within the templates to create 3DOP materials, especially for those beyond the well-studied silica-, carbon-and metal-organic framework (MOF)-based materials.…”