MXene represents new kinds of two-dimensional material transition metal carbides and/or carbonitrides, which have attracted much attention in various applications including electrochemical storage devices, catalysts, and polymer composite. Here, we report a facile method to synthesize Ti₃C₂T_x MXene nanosheets and prepare a novel electrically conductive adhesive based on epoxy resin filled with Ti₃C₂T_x MXene nanosheets by solution blending. The structure, morphology, and performance of Ti₃C₂Tx MXene nanosheets and epoxy/Ti₃C₂T_x MXene nanosheets composite were investigated. The results show that Ti₃C₂T_x MXene possesses nanosheet structure. Ti₃C₂T_x MXene nanosheets were homogeneously dispersed in epoxy resin. Electrical conductivity and mechanical properties measurements reveal that the epoxy/Ti₃C₂T_x MXene nanosheet composite exhibited both good electrical conductivity (4.52 × 10⁻⁴ S/m) and favorable mechanical properties (tensile strength of 66.2 MPa and impact strength of 24.2 kJ/m²) when the content of Ti₃C₂T_x MXene nanosheets is 1.2 wt %. Thus, Ti₃C₂T_x MXene is a promising filler for electrically conductive adhesive with high electric conductivity and high mechanical performance.

The design of sulfur hosts with polar, sulfurphilic, and conductive network is critical to lithium‐sulfur (Li‐S) batteries whose potential applications are greatly limited by the lithium polysulfide shuttle effect. Mxenes, possessing layered‐stacked structures and high electrical conductivities, have a great potential in sulfur hosts. Herein, sulfur nanoparticles uniformly decorated on titanium carbide Mxene (S@Ti ₃ C ₂ T _x Mxene) are synthesized via a hydrothermal method and then utilized as a cathode for lithium‐sulfur batteries. This unique architecture could accommodate sulfur nanoparticles expansion during cycling, suppress the shuttling of lithium polysulfide, and enhance electronical conductivity. Consequently, the S@Mxene with a high areal sulfur loading (∼4.0 mg cm ⁻² ) exhibits a high capacity (1477.2 mAh g ⁻¹ ) and a low capacity loss per cycle of 0.18% after 100 cycles at 0.2 C. This work may shed lights on the development of high performance sulfur‐based cathode materials for Li‐S batteries.

Graphene-based powder absorbers have been used to attain excellent microwave absorption. However, it is not clear if inferior microwave absorption by pure graphene materials can be attributed to impedance mismatching or inadequate attenuation capability. In this comparative study, we focus on these aspects. Graphene nanoplatelets (GNPs) multi-component composites (GNPs@Ni_xS_y@MoS₂) were prepared by hydrothermal reaction with different S and Mo molar ratios. The morphologies, phase crystals, elemental composition, and magnetic properties of the composites were also analyzed. In addition, microwave absorption of the as-prepared samples was investigated and it revealed that the impedance mismatching could be responsible for inferior microwave absorption; higher conductivity can lead to skin effect that inhibits the further incidence of microwaves into the absorbers. Furthermore, the optimum reflection loss (RL) of GNPs@Ni_xS_y@MoS₂-2 can reach −43.3 dB at a thickness of 2.2 mm and the corresponding bandwidth with effective attenuation (RL < −10 dB) of up to 3.6 GHz (from 7.0 to 10.6 GHz). Compared with the GNPs, the enhanced microwave absorption can be assigned to the synergistic effects of conductive and dielectric losses.