Three-Dimensional MOFs@MXene Aerogel Composite Derived MXene Threaded Hollow Carbon Confined CoS Nanoparticles toward Advanced Alkali-Ion Batteries

Abstract

MXene combining high metal-like conductivity, high hydrophilicity, and abundant surface functional groups has been recognized as a class of versatile two-dimensional materials for many applications. However, the aggregation of MXene nanosheets from interlayer van der Waals force and hydrogen bonds represents a major problem that severely limits their practical use. Here, we report an aerogel structure of MOFs@ MXene, in which the in situ formed MOF particles can effectively prevent the accumulation of MXene, enabling a three-dimensional (3D) hierarchical porous conductive network to be composed with an ultralight feature. Subsequently, a 3D porous MXene aerogel threaded hollow CoS nanobox composite ((CoS NP@NHC)@MXene) derived from the MOFs@MXene aerogel precursor was synthesized, and the highly interconnected MXene network and hierarchical porous structure coupled with the ultrafine nanocrystallization of the electrochemically active phase of CoS yield the hybrid system with excellent electron and ion transport properties. Benefiting from the synergistic effect of the components, the (CoS NP@NHC)@MXene composite manifests outstanding electrochemistry properties as electrode materials for all of the lithium-ion batteries (LIBs), sodium-ion batteries (SIBs), and potassium-ion batteries (PIBs). It demonstrated the excellent cycle stability and high capacities of 1145.9 mAh g −1 at 1 A g −1 after 800 cycles and 574.1 mAh g −1 at 5 A g −1 after 1000 cycles for LIBs, 420 mAh g −1 at 2 A g −1 after 650 cycles for SIBs, and 210 mAh g −1 at 2 A g −1 after 500 cycles for PIBs. First-principle calculations confirmed that the (CoS NP@NHC)@MXene hybrid could enhance the charge transfer reaction kinetics, particularly at the interface. More importantly, the excellent rate performance under high mass loading and the high volumetric energy and power density of the entire electrode represent the potential of (CoS NP@NHC) @MXene composites for applications to practical electrochemical energy storage devices. The synthesis method reported in this Article is versatile and can be easily extended to produce other porous MXene-aerogel-based materials for various applications.

MOF-Derived ZnS Nanodots/Ti3C2Tx MXene Hybrids Boosting Superior Lithium Storage Performance

“…In addition, the low lithiation potential (~ 0.1 V vs. Li + /Li) of graphite enables the risk of lithium dendrites formation, which may trigger internal short and thus lead to safety concern [3,4]. Transition metal sulfides (TMSs) [5][6][7], such as MoS 2 [8,9], SnS 2 [10,11], CoS [12], and ZnS [13], have received considerable attention as promising candidate anode materials to replace graphite on account of their high specific capacity and moderate working potential. Among TMSs, ZnS is one of the most attractive anode candidates for lithium storage because of its high theoretical lithium storage capacity, non-toxicity, and low cost.…”

Water‐Soluble Salt Template‐Assisted Anchor of Hollow FeS2 Nanoparticle Inside 3D Carbon Skeleton to Achieve Fast Potassium‐Ion Storage

“…[ 18,22 ] To address above issue, constructing a hybrid structure with carbon materials has been employed as an efficient strategy to improve the comprehensive performance of electrode materials. [ 14,23,24 ] In general, through careful design of nanostructures, carbon materials are endowed with good electronic conductivity and good elasticity. [ 23,25,26 ] Therefore, anchoring the active material onto the carbon matrix would not only largely enhance the reaction kinetics, but also alleviate structural damage and pulverization of the active material during K‐ions insertion or extraction, offering extra benefits for the cycling stability of the active materials.…”

“…Recently, transition metal sulfides (such as MoS 2 , CoS, and CuS) have aroused extensive attention in view of their high theoretical capacities, decent redox reversibilities, and low‐cost. [ 14–21 ] Nevertheless, most of the metal sulfides materials exhibit inferior rate capability and rapid capacity degradation because of their poor electrical conductivity and unavoidable structure collapse incurred by repeated K‐ions insertion and extraction process. [ 18,22 ] To address above issue, constructing a hybrid structure with carbon materials has been employed as an efficient strategy to improve the comprehensive performance of electrode materials.…”

Synthesis and application of carbon-based hollow nanomaterials

“…The preparation of carbon-based hollow structure nanomaterials by this method is generally carbonizing some hollow carbon precursors. In addition, in recent years, some new metal organic framework materials can also obtain carbon-based hollow structures by properly controlling the calcination conditions, which greatly enriches the range of carbon-based hollow structure nanomaterials prepared by self template method [15,16] .…”