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Layer structured MoS2 with intercalation of polyaniline and crystal defects was prepared, which delivers high reversible capacity and excellent cycle stability, including 77.8 mA h g−1 at 1 A g−1 and near 100% retention rate after 750 cycles.

Core-shell structured Ni-ZIF-67@ZIF-8 derived bimetal selenides encapsulating into a 3D interpenetrating dual-carbon framework (Ni3Se4@CoSe2@C/CNTs) have been designed and prepared via carbonization and subsequent selenization processes. In this hierarchical structure, Ni3Se4@CoSe2 nanocrystals were uniformly dispersed into the 3D carbon framework structure/carbon nanotubes networks, which greatly enhanced the electronic conductivity and further enabled ultrafast Na-ion diffusion kinetics. When used as anode materials of sodium ion battery (SIB), The Ni3Se4@CoSe2@C/CNTs electrode delivered the excellent rate capability of 206 mA h g-1 at 3 A g-1 and marvelous cyclic stability with capacity retention of 243 mA h g-1 after 600 cycles at 1 A g-1. This research provides a new way to prepare bimetallic selenide derived from MOF precursor with amazing heterostructure as the advanced anode materials for SIBs.

Nickel and manganese co-substitution in a hollow Prussian blue nanocubes has been successfully carried out via utilizing a high-concentration polymer template, with an ultrahigh capacity of 138.4 mA h g−1 at 0.05 A g−1 in an aqueous zinc-ion battery.

Yolk–shell structure CoSe2@NiCoSe4-NC has been synthesized through in situ etching and subsequent selenization process of the ZIF-67, which exhibits excellent rate capability and outstanding cycle stability for sodium-ion battery anode.

Simple synthesis strategy was adopted to prepare (NH4)2V6O16 with co-intercalation of Na+ and H2O, which not only enhances the binding energy between V-O layers but also successfully improves the structural stability during the cyclic process.

Hierarchical Co1-xS/MnS/NC nanowires were prepared by a simple hydrothermal reaction and subsequent annealing of its 1D coordination polymer precursors, which can maintain 612.9 mAh g−1 after 100 cycles at 0.5 A g−1 and 544.6 mAh g−1 after 200 cycles at 1.0 A g−1 for SIBs.

Mixed metal sulfides have been widely used as anode material of sodium-ion batteries (SIBs) because of their excellent conductivity and sodium ion storage performance. Herein, ReS2@NiS2 heterostructures have been triumphantly designed and prepared through anchoring ReS2 nanosheet arrays on the surface of NiS2 hollow nanosphere. Specifically, the carbon nanospheres was used as hard template to synthesize NiS2 hollow spheres as the substrate and then the ultrathin two-dimensional ReS2 nanosheet arrays were uniformly grown on the surface of NiS2. The internal hollow property provides sufficient space to relieve the volume expansion, and the outer two-dimensional nanosheet realizes the rapid electron transport and insertion/extraction of Na+. Owing to the great improvement of the transport kinetics of Na+, NiS2@ReS2 heterostructure electrode can achieve a high specific capacity of 400 mAh/g at the high current density of 1 A/g and still maintain a stable cycle stability even after 220 cycles. This hard template method not only paves a new way for the design and construct binary metal sulfide heterostructure electrode materials with outstanding electrochemical performance for Na+ batteries but also open up the potential applications of anode materials of SIBs.

With the proliferation of modern integrated electronic and telecommunication systems, high-performance electromagnetic interference (EMI) shielding materials with flexibility, outstanding thermal conductive properties and superior EMI shielding performances are designed to solve the problems of electromagnetic radiation and heat accumulation. Herein, flexible asymmetric trilaminar architecture film with good mechanical properties is prepared via the facile three-step vacuum-assisted filtration (VAF) followed by hot-pressing approach, which is composed of silver-plated aramid nanofibers (ANF-Ag), ANF- Fe3O4&CNT (ANF-FC) and ANF-reduced graphene oxide (ANF-rGO) layers. The conductive ANF-Ag and ANF-rGO layers acted as the EMI shielding, thermal conductive layers, and supporting substrate layers. The magnetic ANF-FC layer played the role in synergistically enhancing the EMI shielding performance. The resultant flexible and asymmetric trilaminar hybrid membrane exhibited maximum thermal conductivity of 8.5 W·m-1K-1 and EMI SE of 67.5 dB, but also maintained a high tensile strength of 75.5 MPa and superb electrical conductivity of 2.46×106 S/m. This asymmetric trilaminar structures film holds great promise to addresses issues of electromagnetic radiation and heat accumulation for personal smart electronic devices, wearable electronics, electronic telecommunication systems.

The mechanism/effect of surface etching and post-process of Kevlar Fiber (KF) by metal ions were investigated in detail by etching Kevlar-29 fiber with different solutions. After the post-process of heat or solvent treatment, surface morphology changes of etched fibers were further discussed. Etching mechanisms have been demonstrated according to the results of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction instrument, atomic force microscopy, and scanning electron microscopy. The results exhibited that the coarsening of KF surface was caused by stress cracking instead of chain degradation. Furthermore, the cracks produced by stress cracking will extend lengthwise along the fiber surface due to the breakdown of hydrogen bonds. In addition, it is shown that the stress concentration appears on the fiber surface. In all, the etching mechanism consists of two parts: stress cracking and crack propagation. The proposed etching mechanism is of great significance to further improve the fiber surface and enhance the bond with the resin.

Zeolite imidazolate frameworks (ZIFs), as a typical class of metal-organic frameworks (MOFs), have attracted a great deal of attention in the field of energy storage and conversation due to their chemical structure stability, facile synthesis and environmental friendliness. Among of ZIFs family, the zinc-based imidazolate framework (ZIF-8) and cobalt-based imidazolate framework (ZIF-67) have considered as promising ZIFs materials, which attributed to their tunable porosity, stable structure, and desirable electrical conductivity. To date, various ZIF-8 and ZIF67 derived materials, including carbon materials, metal oxides, sulfides, selenides, carbides and phosphides, have been successfully synthesized using ZIFs as templates and evaluated as promising electrode materials for secondary batteries and electrocatalysis. This review provides an effective guide for the comprehension of the performance optimization and application prospects of ZIFs derivatives, specifically focusing on the optimization of structure and their application in secondary batteries and electrocatalysis. In detail, we present recent advances in the improvement of electrochemical performance of ZIF-8, ZIF-67 and ZIF-8@ZIF-67 derived nanomaterials and their hybrids, including carbon materials, metal oxides, carbides, oxides, sulfides, selenides, and phosphides for high-performance secondary batteries and electrocatalysis.

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

Novel CoNi binary metal oxide superstructures assembled with cross-stacked nanosheets (Co3O4/NiO/NC) have been successfully prepared by two-step thermal annealing process with CoNi-based and cyano-bridged coordination polymer (CoNiCP). Ascribing to the super decussate structure and as-obtained three-dimensional carbon conductive network, the obtained material exhibited excellent lithium-ion storage capacity including superior cycling stability and rate performance through facilitating the easy electron/ion transport. For example, CoNi binary metal oxide superstructures exhibit an excellent rate capacity of 493 mA h g−1 at 5.0 A g−1 and a long-lifetime cycling performance of 1390 mA h g−1 after 100 cycles at 0.2 A g−1. This strategy may pave a way for designing and preparing binary metal oxide superstructures materials with excellent electrochemical performance for lithium-ion battery by using coordination polymers as the sacrificial template.

Ni3[Fe(CN)6]2 nano-cubic precursors were prepared by chemical coprecipitation at room temperature with nickel acetate and potassium ferricyanide as raw materials. The corresponding NiFe2O4-NiO@C composites with excellent crystallization were prepared by two-stage oxidation at low temperature. The microstructure and electrochemical behavior of the materials showed that the Prussian blue analog was transformed into metal oxide while the carbon coating was maintained in the two-stage oxidation at low temperature. The existence of the carbon coating reduces the charge transfer impedance to 31.5 Ω. At the current density of 500 mA/g, the reversible capacity of 632.7 mAh/g is maintained after 500 cycles. At the same time, carbon cladding can also enhance the role of pseudocapacitance in the material. At the scanning rate of 0.1 mV/s, the pseudocapacitance account for 54.4% of the total discharge capacity, which is significantly higher than that of uncoated materials.

A micro-scale rod-like heterostructure derived from molybdenum-based metal organic framework (Mo-MOF) has been successfully prepared via subsequent annealing treatment, which assembled from N-doped carbon encapsulated MoSe2 nanosheets grown on the surface of MoO2 microrod (named as MoO2@MoSe2@NC). For this novel heterostructure, the MoO2 nanoparticles assembled into rod core not only serve as supporting substrate for facilitating the fast kinetics of Li+ cations inside the electrode but also protect the MoSe2 structure from restacking in the charge/discharge process. Moreover, the outer-layered MoSe2 nanosheets enable the fast lithium ion movement owing to its large interlayer spacing. Moreover, this unique rod-like core–shell structure composite could further effectively alleviate the structural strains caused by large volume expansion during charge/discharge process, thus leading to stable electrochemical performance when evaluated as anode material for lithium ion batteries. Electrochemical testing exhibits that the MoO2@MoSe2@NC heterostructure presents highly reversible capacity of 468 mAh g−1 at 0.5 A g−1 and superior rate capability (318 mAh g−1 even at 5.0 A g−1), which is attributed to the synergistic effect of N-doped carbon encapsulated MoSe2 nanosheets and MoO2 nanoparticles.

A appropriate size with three-dimension (3D) channels for lithium diffusion plays an important role in constructing high-performing LiNi0.5Mn1.5O4 (LNMO) cathode materials, as it can not only reduce the transport path of lithium ions and electrons, but also reduce the side effects and withstand the structural strain in the process of repetitive Li+ intercalation/deintercalation. In this work, an efficient method for designing the hollow LNMO microsphere with 3D channels structure by using polyethylene oxide (PEO) as soft template agent assisted solvothermal method is proposed. Experimental results indicate that PEO can make the reagents mingle evenly and nucleate slowly in the solvothermal process, thus obtaining a homogeneous distribution of carbonate precursors. In the final LNMO products, the hollow 3D channels structure obtained by the decomposition of PEO and carbonate precursor in the calcination can provide abundant electroactive zones and electron/ion transport paths during the charge/discharge process, which benefits to improve the cycling performance and rate capability. The LNMO prepared by adding 1 g PEO possesses the most outstanding electrochemical performance, which presented an excellent discharge capacity of 143.1 mAh g−1 at 0.1 C and with a capacity retention of 92.2% after 100 cycles at 1 C. The superior performance attributed to the 3D channels structure of hollow microspheres, which provide uninterrupted conductive systems and therefore achieve the stable transfer for electron/ion.

Layered nickel oxides have been focused with intense research interests as high-performance lithium-ion batterie (LIB) anode. However, it is hard to obtain few layered nickel oxides material directly as it easily forms bulk material with the strong interaction between the interlayer. In this work, two-dimensional (2D) nickel-based coordination polymers were successfully prepared according to aqueous phase copolymerization approach. And then uniform carbon-doped NiO nanosheets were successfully obtained from facile solution assembly and post-thermal treatment. The detailed electrochemical testing shows that the uniform NiO nanocrystals encapsulated into porous N-doped carbon (NiO@NC) nanosheets present much higher rate capability with the discharge specific capacity of 782.7 mAh·g−1 at high current density of 2.0 A·g−1 than pure NiO (690 mAh·g−1). It also shows long-term cycling performance with 91% retention after 50 cycles at 1.0 A·g−1. The high rate capability, cycling stability and the easy synthesis make NiO@NC nanosheets as a promising candidate for LIB anode and build up new way for the fabrication of metal oxides anode materials.

Nanocavity-enriched Co3O4@ZnCo2O4@NC porous nanowires have been successfully prepared by a two-step annealing process of one-dimensional (1D) coordination polymer precursors. Such unique nanowires with nanocavity-based porous channels can provide a large specific surface area, which allows fast electron/ion transfer and alleviates the volume expansion caused by strain during the charge/discharge processes. While used as the anode material of lithium-ion batteries (LIBs), Co3O4@ZnCo2O4@NC electrodes exhibit outstanding rate capacity and cycling stability, such as a high reversible capacity of 931 mA h g-1 after 50 cycles at a current density of 0.1 A g-1 and a long-term cycling efficiency of 649 mA h g-1 after 600 cycles at 1 A g-1. This coordination polymer template method lays a solid foundation for the design and preparation of bimetal oxide materials with outstanding electrochemical performance for LIBs.

The investigation on rechargeable potassium-ion batteries (PIBs) has been revitalized owing to the unique characteristics of abundant reserves and comparable energy density over lithium-ion batteries (LIBs), which hold huge potential for grid-scale electrical energy storage systems. Currently, the lack of appropriate anode materials has hindered the development of PIBs. Metal chalcogenides (MCs) including metal oxides, sulfides, selenides, and their carbon-based hybrids have aroused tremendous attention as anodes for PIBs in the scientific community due to the benefits of high theoretical capacity and various physicochemical properties. Herein, a comprehensive overview is provided on the recent achievements of MCs and their carbon-based hybrids, and the effects of nanostructured MCs on the future of PIBs technologies are discussed in detail by studying their inherent diverse attributes. Besides, several effective measures are emphasized to deal with imminent issues faced by MCs in PIBs, proposing valuable insights for the development of potassium-based rechargeable batteries.

Uniform cubic Co-based metal-organic framework has been synthesized thorough a facile co-precipitate reaction. Then monodispersed Co3O4 nanocrystallines encapsulated into N-doped carbon nanocapsules (Co3O4@NCN) was successfully prepared by successive annealing processes of precursor under nitrogen and air atmosphere. Such porous Co3O4@NCN hybrid exhibits excellent electrochemical characteristics in lithium ion storage due to N-doped carbon nanocapsules as nanoreactors with plentiful cavities to accommodate volume changing and outstanding transport kinetic to maintain mechanical stability of electrode materials. Especially, the Co3O4@NCN electrode manifests ultra-long cycling capability and rate performance, exhibiting a high discharging specific capacity of 751 mAh g−1 at 1.0 A g−1. Hence, this special design presents a synthetic strategy for other metals oxides with controllable morphology and good electrochemical property in energy storage areas.

Molybdenum phosphide (MoP) has attracted extensive attention as promising anode candidates for lithium-ion batteries owing to its high specific capacity, low potential range and low polarization. However, severe volume changes and intrinsic low conductivity are major challenges for further application of MoP electrode materials. In this work, a coral-like MoP microsphere encapsulated by N-doped carbon (MoP@NDC) was successfully prepared through annealing the precursor derived from self-polymerization of dopamine with phosphomolybdic acid. The introduction of carbon framework not only serves as matrix to confine MoP nanocrystals from aggregations, but also improves the electrochemical conductivity and facilitates lithium ion or electron transport on the surface of MoP. Such hierarchical structure delivered high discharge capacity of 495 mAh g−1 after 300 cycles with 90.1% capacity retention, which could be attributed to the synergistic effects of MoP nanoparticles and conductive carbon network. This design strategy shows MoP@NDC electrode with applicable application as anode in lithium-ion battery.

Sodium-ion batteries (SIBs) have received increasing interest for large-scale energy storage based on the high natural abundance and low-cost of sodium resources. However, owing to the large ionic radius of sodium ion, SIBs anodes exhibit sluggish charge kinetic and rapid capacity decay, which severely hindered their practical application. In this work, we develop a novel approach to couple two-dimensional (2D) bimetal Co-Ni selenide nanosheets with Ti

Tyres made of natural rubber (NR) filled with silica (SiO2) are usually called energy-saving tyres with excellent resistance to wet slip and low friction resistance. It’s noted that the tyres tend to aging and produce static electricity caused by poor electrical and thermal conductivity of NR and SiO2. Therefore, it’s urgent to prepare NR/SiO2 composites with enhanced thermal conductivity and antistatic performance. Here, a simple, efficient, and green method is applied to obtain graphene nanosheets (GNs) compatible well with NR, and the influence of GNs dosage on the properties of SiO2/NR composites are explored. The results show that GNs are helpful to improve mechanical properties and solvent resistance of SiO2/NR composites. Outstandingly, the thermal conductivity and electrical conductivity of 2.0wt%GNs/SiO2/NR composites are increased by 60% and 5 orders of magnitude compared with SiO2/NR composites, reaching to 0.29W·m-1·K-1 and 4.2×10-8 S/m respectively. It’s expected that GNs can become a candidate for improving thermal conductivity and antistatic properties of energy-saving tyres.