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The advancement of electromagnetic interference (EMI) shielding materials provides reliable protection for the communication technology. However, the performance of conventional EMI shielding materials is significantly diminished in high‐temperature conditions. Herein, an efficient method is proposed to prepare conductive fabrics with temperature‐strengthened EMI shielding performance via chemical plating technique. The as‐prepared polyethylene/polyester‐metallized fabric (PMF) coated with Ni–W–P alloy exhibits outstanding EMI shielding effectiveness (SE) in X band, which is strengthened from 16 to 59 dB with temperature raising from room temperature to 130 °C. Particularly, the corresponding temperature‐strengthened shielding behaviors are investigated through simulations in Computer Simulation Technology. Additionally, PMF presents excellent corrosion resistance (corrosion voltage [Ecoor] of −0.324 V and corrosion current [Icoor] of −6.760 A·cm−2) and admirable Joule heating performance, reaching maximum temperature of 74 °C at only 1.5 V. Therefore, the as‐prepared PMF endows enormous potential in EMI protection under high temperature and harsh environments. [ABSTRACT FROM AUTHOR]

The backwardness of n‐type organic semiconductors still exists compared with the p‐type counterparts. Thus, the development of high‐performance n‐type organic semiconductors is of great importance for organic electronic devices and their integrated circuits. In recent years, azabenzannulated perylene diimide (PDI), as one of immense bay‐region‐annulated PDI derivatives, has drawn considerable attentions. However, the electronic mobilities of azabenzannulated PDI derivatives are barely satisfactory. In this contribution, the peripheral benzene ring in azabenzannulated PDI 2 was fused to the ortho position by intramolecular C−H arylation cyclization. This endows the resultant azabenzannulated PDI 4 a planar configuration as well as electron deficient pentagonal ring. As a result, the electronic mobility of 4 is almost two orders of magnitude higher than that of the nonfused azabenzannulated PDI 2. This work shall pave a new avenue in elevating the performance of azabenzannulated PDI in organic electronics. [ABSTRACT FROM AUTHOR]

To meet the demands for flexible electromagnetic interference (EMI) shielding materials, a type of conductive fabric is prepared by generating three-dimensional (3D) porous laser-induced graphene (LIG) in situ on the surface of the aramid fabric (AF) and then electroless plating copper. After LIG treatment, the porous AF demonstrates admirable conductivity due to the generation of graphene. The superior surface resistance of the conductive fabric can reach 1.57 Ω/sq after copper deposition, and the average EMI shielding effectiveness (SE) can reach 34.3 dB in a frequency range of 8.2 to 12.4 GHz, with the EMW absorption accounting for about 80%. The proposed technology provides a new idea for preparation of flexible EMI shielding materials. [ABSTRACT FROM AUTHOR]

Coaxial structure fiber supercapacitor has received extensive attention due to its good integrity and excellent electrochemical performance. However, the complicated preparation process, precise technical requirements and low yield restricted its development. A coaxial structure fiber supercapacitor with an operating voltage of 1.6 V was prepared by braiding a core yarn of AC@CNT (AC is activated carbon and CNT is carbon nanotubes) negtive electrode and a braided yarn of NiCo2S4@CNT positive electrode. This braiding strategy is simple and efficient, and the fabricated fiber supercapacitor has a high energy density (energy density of 35.1 mW·h/cm³ at power density of 233.2 mW/cm³) and outstanding flexibility (no obvious change after bending 1 000 cycles in cyclic voltammetry curve). The braided fiber supercapacitors show excellent integrability. The output voltage of 2-unit tandem fiber supercapacitors reaches 3.2 V, which can light up the "DHU 70" pattern composed of 65 LEDs. This work provides a new strategy for the preparation of coaxial structure fiber supercapacitors. [ABSTRACT FROM AUTHOR]

Stretchable supercapacitors have received widespread attention due to their potential applications in wearable electronics and health monitoring. Stretchable supercapacitors not only possess advantages such as high power density, long cycle life, safety, and low cost of conventional supercapacitors but also have excellent flexibility and stretchability, which make them well integrated with other wearable systems. In this review, various strategies to fabricate stretchable supercapacitors are focused. The preparation methods for stretchable electrodes/devices in the literature are carefully classified and analyzed. Three strategies for preparing stretchable electrodes/devices are summarized in detail—the design of elastic polymer substrates, stretchable electrode structures, and composite electrodes combined with elastic polymers and stretchable structures. Meanwhile, the interface problem of electrodes/devices in the stretching process is studied in depth. The research progress of multifunctional stretchable supercapacitors is also introduced. Finally, challenges and possible solutions that still need to be addressed in the future development of stretchable supercapacitors are highlighted and prospected. This review comprehensively discusses the latest research progress in the field of stretchable supercapacitors and systematically elucidates the electrochemical and mechanical properties of these devices, hoping to improve the roadmap for scientists and engineers to develop supercapacitors with high electrochemical performance and good stretchability. [ABSTRACT FROM AUTHOR]