Multiple Heterointerfaces and Heterostructure Engineering in MXene@Co-P-S Hybrids Promote High-Performance Sodium-Ion Half/Full Batteries.

In this paper, heterogeneous cobalt phosphosulfide (CoS/CoP) nanocrystals anchoring on few-layered MXene nanosheets (MXene@CoS/CoP) were prepared by growth and the subsequent high-temperature phosphorization/sulfidation processes. Thanks to the synergistic effect and the abundant phase interfaces of CoS, CoP, and MXene, the electron transfer and Na diffusion processes were greatly accelerated. Meanwhile, the high electrical conductivity of MXene nanosheets and the heterogeneous structure of CoS/CoP effectively avoided the MXene restacking and the agglomeration of phosphosulfide particles, thus mitigating volumetric expansion during charging and discharging.

Core-shell Ru@CoP synergistic catalyst as polysulfides adsorption-catalytic conversion mediator with enhanced redox kinetics in lithium-sulfur batteries.

Lithium-sulfur batteries (LSBs) have emerged as the research hotspot due to their compelling merits, including high specific capacity (1675 mAh g1), theoretical energy density (2600 Wh kg1), environmental friendliness, and economic advantages. However, challenges still exist for further application due to their inherent issues such as the natural insulation, shuttle effect, and volume expansion of sulfur cathode during the continuous cycle processes. These factors obstruct the lithium ions (Li) transfer process and sulfur utilization, resulting in significant impedance and inducing inferior battery performance.

Micro-mesoporous cobalt phosphosulfide (CoS/CoP/NC) nanowires for ultrahigh rate capacity and ultrastable sodium ion battery.

The construction of heterostructure materials has been demonstrated as the promising approach to design high-performance anode materials for sodium ion batteries (SIBs). Herein, micro-mesoporous cobalt phosphosulfide nanowires (CoS/CoP/NC) with CoS/CoP hetero-nanocrystals encapsulating into N-doped carbon frameworks were successfully synthesized via hydrothermal reaction and subsequent phosphosulfidation process. The obtained micro-mesoporous nanowires greatly improve the charge transport kinetics from the facilitation of the charge transport into the inner part of nanowire.

Cobalt-vanadium sulfide yolk-shell nanocages from surface etching and ion-exchange of ZIF-67 for ultra-high rate-capability sodium ion battery.

Development of high-performance metal sulfides anode materials is a great challenge for sodium-ion batteries (SIBs). In this work, a cobalt-based imidazolate framework (ZIF-67) were firstly synthesized and applied as precursor. After the successive surface etching, ion exchange and sulfidation processes, the final cobalt-vanadium sulfide yolk-shell nanocages were obtained (CoS/VS@NC) with VS shell and CoS yolk encapsulated into nitrogen doped carbon frameworks.

Organic polymer coating induced multiple heteroatom-doped carbon framework confined CoS@NPSC core-shell hexapod for advanced sodium/potassium ion batteries.

Synthesis of advanced structure and multiple heteroatom-doped carbon based heterostructure materials are the key to the preparation of high-performance energy storage electrode materials. Herein, the hexapod-shaped CoS@NPSC has been triumphantly prepared using hexapod ZIF-67 as the sacrificial template to prepare CoS inner core and N, P, and S tri-doped carbon (NPSC) as the shell through the carbonization of the organic polymer precursor. When applied as anode for Na batteries (SIBs) and K batteries (PIBs), CoS@NPSC presents the high reversible specific capability of 747.

Synergistic enhancement of chemisorption and catalytic conversion in lithium-sulfur batteries via CoFe/CoN separator mediator.

Lithium-sulfur batteries (LSBs) show considerable potential in next-generation high performance batteries, but the heavy shuttle effect and sluggish redox kinetics of polysulfide hinder their further applications. In this paper, to address these shortcomings of LSBs, CoFe/CoN heterostructure were prepared and constructed from their Fe-Co Prussian blue analogue precursors under the condition of high temperature pyrolysis. The obtained CoFe/CoN display excellent immobilization-diffusion-conversion performance for polysulfides by synergistic effect in successfully hindering the shuttle effect of polysulfides.

Construction of 2D sandwich-like NaVO·3HO@MXene heterostructure for advanced aqueous zinc ion batteries.

Aqueous zinc ion batteries (AZIBs) have attained enormous attention in the last few years. The cathode materials of aqueous zinc ion batteries play a vital effect in their electrochemical and battery properties. In this manuscript, Sandwich-like MXene@NaVO·3HO (NVO@MXene) heterostructure was successfully prepared by the combination and cooperation of the layer lattice structure of NaVO·3HO and the high conductivity of MXene.

Topochemical and phase transformation induced CoS/NC nanosheets for high-performance sodium-ion batteries.

In this paper, a cobalt-based sulfide nanosheet structure (CoS/NC) was successfully synthesized by topochemical and phase transformation processes from a dodecahedral cobalt-based imidazole skeleton (ZIF-67) as a self-template. The 2D sheet structure facilitates full contact of electrode materials with the electrolyte and shortens the diffusion distance for electrons and ions. In addition, the nitrogen-doped carbon framework derived from ZIF-67 promotes electron transfer and provides a reliable skeleton to buffer volume expansion during discharging and charging.

Modified separators boost polysulfides adsorption-catalysis in lithium-sulfur batteries from Ni@Co hetero-nanocrystals into CNT-porous carbon dual frameworks.

In this manuscript, nickel/cobalt bimetallic nanocrystals confining into three-dimensional interpenetrating dual-carbon conductive structure (NiCo@C/CNTs) were successfully manufactured by annealing its core-shell structure (Ni-ZIF-67@ZIF-8) precursor under the high temperature. The results presented that the bimetallic nickel and cobalt nanocrystals with superior catalytic activity could quickly convert solid LiS/LiSinto soluble LiPSs and effectively decrease the energy barrier. While the hierarchical CNT-porous carbon dual frameworks can provide quick electron/ion transport because of their large specific surface area and the exposure of enough active sites.

ZnSe@NPSC core-shell nanorods for super sodium ion storage induced from an organic polymer derived N, P, S tri-doped carbon framework.

In this work, core-shell structured ZnSe@NPSC nanorods were prepared with a N, P, S hetero-doped carbon shell. The design of the core-shell structure is conducive to facilitating the transport of electrons and buffering the volume expansion during charge/discharge processes, which is favourable for improving the sodium ion storage properties of ZnSe@NPSC. Therefore, it can deliver capacities of 376.

Interface ion-exchange strategy of MXene@FeInS hetero-structure for super sodium ion half/full batteries.

Herein, a well-designed hierarchical architecture of bimetallic transition sulfide FeInS nanoparticles anchoring on the TiC MXene flakes has been prepared by cation exchange and subsequent high-temperature sulfidation processes. The introduction of MXene substrate with excellent conductivity not only accelerates the migration rate of Na to achieve fast reaction dynamics but provides abundant deposition sites for the FeInS nanoparticles. In addition, this hierarchical structure of MXene@FeInS can effectively restrain the accumulation of MXene to guarantee the maximized exposure of redox active sites into the electrolyte, and simultaneously relieve the volume expansion in the repeated discharging/charging processes.

Synergistic catalytic conversion and chemisorption of polysulfides from Fe/FeC/FeN nanocubes modified separator for advanced Li-S batteries.

Lithium sulfur batteries (LSBs) have been considered as one of the most promising options for next generation high-performance batteries. However, the heavy shuttle effect and inferior redox conversion during the charge/discharge processes of the batteries have greatly hindered their further applications. In this study, to address these disadvantages of LSBs, Fe/FeC/FeN heterostructured nanocubes were designed and prepared through high temperature carbonization process using Prussian blue precursor.

Hetero-structural and hetero-interfacial engineering of MXene@BiS/MoS hybrid for advanced sodium/potassium-ion batteries.

Herein, heterogeneous bimetallic sulfides BiS/MoS nanoparticles anchored on MXene (TiCT) nanosheets (MXene@BiS/MoS) were prepared through a solvothermal process and subsequent chemical vapor deposition process. Benefiting from the heterogeneous structure between BiS and MoS and the high conductivity of the TiCT nanosheets, the Na diffusion barrier and charge transfer resistance of this electrode are effectively decreased. Simultaneously, the hierarchical architectures of BiS/MoS and TiCT not only effectively inhibit the re-stacking of MXene and the agglomeration of bimetallic sulfides nanoparticles, but also dramatically relieve the volume expansion during the periodic charge/discharge processes.

Synergistically enhanced sodium ion storage from encapsulating highly dispersed cobalt nanodots into N, P, S tri-doped hexapod carbon framework.

Development of multitudinous heteroatoms co-doped carbon nanomaterials with pleasurable electrochemical behavior for sodium ion batteries is still an enormous challenge. Herein, high dispersion cobalt nanodots encapsulating into N, P, S tri-doped hexapod carbon (H-Co@NPSC) have been victoriously synthesized via H-ZIF67@polymer template strategy with using poly (hexachlorocyclophos-phazene and 4,4'-sulfonyldiphenol) as both carbon source and N, P, S multiple heteroatom doping sources. The uniform distribution of cobalt nanodots and the Co-N bonds are conducive to form a high conductive network, which synergistically increase a lot adsorption sites and lessens the diffusion energy barrier, thereby improving the fast Na ions diffusion kinetics.

Temperature and pressure sensitive ionic conductive triple-network hydrogel for high-durability dual signal sensors.

In this work, the fabrication of strengthened triple network hydrogels was successfully achieved based on in-situ polymerization of polyacrylamide by combining both chemical and physical cross-linking methods. The ion conductive phase of lithium chloride (LiCl) and solvent in the hydrogel were regulated through soaking solution. The pressure and temperature sensing behavior and durability of the hydrogel were investigated.

Heterostructure and doping dual strategies engineering of MoSSe@VS nanosheets aggregated nano-roses for super sodium-ion batteries.

Herein, selenium (Se)-doped MoSSe@VS nanosheets aggregated nano-roses were successfully prepared from a simple hydrothermal process and the subsequent selenium doping process. The hetero-interfaces between MoSSe and VS phase can effectively promote the charge transfer. Meanwhile, the different redox potentials of MoSSe and VS alleviate volume expansion during the repeated sodiation/desodiation processes, which improves the electrochemical reaction kinetics and structural stability of electrode material.

Selenide-doped bismuth sulfides (BiSSe) and their hierarchical heterostructure with ReSfor sodium/potassium-ion batteries.

In this work, selenide-doped bismuth sulfides (BiSSe) was successfully prepared through Se doping BiS Se to improve the electronic conductivity and increase the interlayer spacing. Then the anisotropic ReS nanosheet arrays were grown on the surface of BiSSe to form a hierarchical heterostructure (BiSSe@ReS). The doping and construction of heterostructure processes can greatly improve the electrochemical conductivity of electrode materials and relieve the volume expansion during the continuous charge/discharge processes.

1D hybrid metal coordination polymer-derived hierarchical CoS/MnS/NC nanowires for advanced sodium-ion batteries.

Hierarchical CoS/MnS/NC nanowires have been successfully prepared by a simple hydrothermal reaction and the subsequent annealing process of its one-dimensional (1D) coordination polymer precursors. The Co/MnS/NC heterostructure nanowires can not only buffer the volume expansion during the discharging and charging process but also conspicuously enhance electronic conductivity, which is favourable for improving the rate performance and cycling stability, which can maintain 612.9 mA h g after 100 cycles at 0.

MOF derived cobalt-nickel bimetallic phosphide (CoNiP) modified separator to enhance the polysulfide adsorption-catalysis for superior lithium-sulfur batteries.

Lithium-sulfur batteries (LSBs) have aroused great research interest due to their high theoretical capacity and high energy density. To further develop lithium-sulfur batteries, it has become more and more important to put more efforts in promoting the adsorption and rapid catalytic conversion of lithium polysulfides (LiPSs). Herein, Ni/Co bimetallic phosphides were encapsulated into nitrogen-doped dual carbon conductive network (NiCoP@NC) by annealing and phosphorizing Ni-ZIF-67 precursor at high temperature.

Progressive activation of porous vanadium nitride microspheres with intercalation-conversion reactions toward high performance over a wide temperature range for zinc-ion batteries.

Rechargeable aqueous zinc-ion batteries have great promise for becoming next-generation storage systems, although the irreversible intercalation of Zn and sluggish reaction kinetics impede their wide application. Therefore, it is urgent to develop highly reversible zinc-ion batteries. In this work, we modulate the morphology of vanadium nitride (VN) with different molar amounts of cetyltrimethylammonium bromide (CTAB).

Multilayer structure covalent organic frameworks (COFs) linking by double functional groups for advanced K batteries.

Covalent organic frameworks (COFs) are regarded as the potential and promising anode materials for potassium ion batteries (PIBs) on account of their robust and porous crystalline structure. In this work, multilayer structural COF connected by double functional groups, including imine and amidogent through a simple solvothermalprocess, have been successfully synthesized. The multilayer structure of COF can provide fast charge transfer and combine the merits of imine (the restraint of irreversible dissolution) and amidogent (the supply of more active sites).

Defect engineering of molybdenum disulfide nanosheets boosting super Zn storage from polyaniline intercalation.

In this work, peony-like structured MoS with intercalation of polyaniline and crystal defects was prepared by a simple hydrothermal method. The defect-rich structure and broad interlayer distance can effectively provide vast ion transport paths to enhance the ion diffusion rate. PA-MoS can maintain 157.

Cobalt-nickel bimetallic sulfide (NiS/CoS) based dual-carbon framework for super sodium ion storage.

Design hybrid metal sulfides-based anode materials is one of the most effective approaches to improve the performance of sodium-ion batteries (SIBs). However, owing to the huge volume expansion, the capacity of sulfide-based anode will decay significantly after repeated charge/discharge processes. Herein, we reported the successful demonstration of anode material based on concaved NiS@CoS nanocube (NCSC) via a chemical etching strategy, which was derived from etching and sulfidation of Ni-Co coordination polymers (NiCoCP) precursor.