Highly Porous NiCoSe₄ Microspheres as High‐Performance Anode Materials for Sodium‐Ion Batteries

Abstract

Binary transition metal selenides have been more promising than single transition metal selenides as anode materials for sodium-ion batteries (SIBs). However, the controlled synthesis of transition metal selenides, especially those derived from metal-organic-frameworks with wellcontrolled structure and morphology is still challenging. In this paper, highly porous NiCoSe 4 @NC composite microspheres were synthesized by simultaneous carbonization and selenization of a NiÀ Co-based metal-organic framework (NiCo-MOF) and characterized by scanning electron microscopy, transition electron microscopy, X-Ray diffraction, X-Ray photoelectron spectroscopy and electrochemical techniques. The rationally engineered NiCoSe 4 @NC composite exhibits a capacity of 325 mAh g À 1 at a current density of 1 A g À 1 , and 277.8 mAh g À 1 at 10 A g À 1 . Most importantly, the NiCoSe 4 @NC retains a capacity of 293 mAh g À 1 at 1 A g À 1 after 1500 cycles, with a capacity decay rate of 0.025 % per cycle.

The rational design of nickel-cobalt selenides@selenium nanostructures by adjusting the synthesis environment for high-performance sodium-ion batteries

“…The peaks at 856.18 and 874.18 eV are due to Ni 3+ . In addition, the peaks at 861.28 and 879.18 eV are satellite peaks 19,20. These results indicate the presence of Ni-Se bonds.…”

Role of binary metal chalcogenides in extending the limits of energy storage systems: Challenges and possible solutions

“…Besides composites with binary components, ternary-component composites consisting of CNT/graphene or NC/graphene with BMCs have also been attained [143][144][145][146][147]. For example, an in-situ growth of NiCo 2 S 4 nanoparticles on rGO/CNT was realized via a one-step hydrothermal method using Ni(NO 3 ) 2 •6H 2 O, Co(NO 3 ) 2 •6H 2 O, and C 2 H 5 NS as starting materials [143].…”

“…Recently, metal-organic frameworks (MOFs) have been extensively utilized as starting materials for the preparation of BMCs. By designing Ni-Co-based MOFs as the precursor, a ternary hybrid consisting of porous NC@NiCoSe 4 microspheres, wrapped by graphene, was prepared by a solvothermal, carbonization, and selenization process [146].…”

Heterostructured SnSe2-CoSe2 microspheres embedded in reduced graphene oxides as an anode material with high sodium storage

“…To address above mentioned issues, the methods include design of various structures [42], hybridization with carbon materials [41] have been provided to buffer volume expansion and accelerate ion diffusion kinetics [38,43]. For example, Huang et al designed highly porous NiCoSe 4 microspheres as high-performance anode materials for sodium ion batteries.…”

“…The unique structure is beneficial to alleviate severe volume expansion and mechanical stress in the charge-discharge process. As a result, it exhibits a capacity of 325 mAh g −1 at current density of 1 A g −1 , and 277.8 mAh g −1 at 10 A g − 1 [42]. Bai et al synthesized CoSe 2 -SnSe 2 nanocube-coated nitrogen-doped carbon (CSNC@NC) as anodes for lithium and sodium ion batteries.…”