The vertical composition distribution and crystallinity of photoactive layers are considered to have critical roles in photovoltaic performance. In this concise contribution, the layer-by-layer (LBL) solution process is used to fabricate efficient polymer solar cells. The results show that the vertical composition distribution can be finely regulated via employing solvent additive 1,8-diiodooctane (DIO). The favorable vertical component distribution in tandem with improved crystallinity induced by DIO contributes to the efficient exciton dissociation, charge transportation and extraction, and limited charge recombination loss. Therefore, the optimized LBL devices yield an efficiency of 16.5%, which is higher than that of the control bulk heterojunction solar cells with an efficiency of 15.8%. Importantly, the ternary solar cells based on PM6/ Y6:PC 71 BM LBL active layers demonstrate a promising efficiency of >17%, which is the record efficiency for LBL solar devices reported to date. These findings make clear that the solvent additive-assisted LBL solution process has broader implications for the further optimization of solar cells.

Conductive metal–organic frameworks (MOFs), as a newly emerging multifunctional material, hold enormous promise in electrochemical energy‐storage systems owing to their merits including good electronic conductivity, large surface area, appropriate pore structure, and environmental friendliness. In this contribution, a scalable solvothermal strategy was devised for the bottom‐up fabrication of 1D Cu‐based conductive MOF, that is, Cu3(2,3,6,7,10,11‐hexahydroxytriphenylene)2 (Cu‐CAT) nanowires (NWs), which were further utilized as a competitive anode for lithium‐ion batteries (LIBs). The intrinsic Li storage mechanism of the Cu‐CAT electrode was also explored. Benefiting from its structural virtues, the resultant 1D Cu‐CAT NWs were endowed with superb Li+ diffusion coefficients and electrochemical conductivities and exhibited remarkably high‐rate reversible capacities of approximately 631 mAh g−1 at 0.2 A g−1 and even approximately 381 mAh g−1 at 2 A g−1, along with striking capacity retention of 81 % after 500 cycles at 0.5 A g−1. In addition, a Cu‐CAT NWs‐based full cell assembled with LiNi0.8Co0.1Mn0.1O2 as the cathode displayed a large energy density of approximately 275 Wh kg−1 as well as excellent cycling behavior. These results manifest the promising application of 1D conductive Cu‐CAT NWs in advanced LIBs and even other potential versatile energy‐related fields.

Recently, stretchable electronics have been highly desirable in the Internet of Things and electronic skins. Herein, an innovative and cost-efficient strategy is demonstrated to fabricate highly sensitive, stretchable, and conductive strain-sensing platforms inspired by the geometries of a spiders slit organ and a lobsters shell. The electrically conductive composites are fabricated via embedding the 3D percolation networks of fragmentized graphene sponges (FGS) in poly(styrene-block-butadiene-block-styrene) (SBS) matrix, followed by an iterative process of silver precursor absorption and reduction. The slit- and scale-like structures and hybrid conductive blocks of FGS and Ag nanoparticles (NPs) provide the obtained FGS-Ag-NP-embedded composites with superior electrical conductivity of 1521 S cm , high break elongation of 680%, a wide sensing range of up to 120% strain, high sensitivity of ≈10 at a strain of 120%, fast response time of ≈20 ms, as well as excellent reliability and stability of 2000 cycles. This huge stretchability and sensitivity is attributed to the combination of high stretchability of SBS and the binary synergistic effects of designed FGS architectures and Ag NPs. Moreover, the FGS/SBS/Ag composites can be employed as wearable sensors to detect the modes of finger motions successfully, and patterned conductive interconnects for flexible arrays of light-emitting diodes.

Metal‐organic frameworks (MOFs), typically constructed with metallic nodes and organic linkers, have influenced the development of modular solid materials. Their adjustable molecular structure provides a remarkable variety of MOF‐based solid‐state structures towards diverse applications. However, the low conductivity of traditional MOFs extremely hinders their applications in electronic and electrochemical devices. The emerging conductive MOFs, generally possessing two‐dimensional layered structures, are endowed with both the structural merits of common MOFs and exceptional electronic/ionic conductivities. Besides, the selection and optimization of ligands and metal centers, as well as synthetic methods enormously affects the intrinsic conductivity of conductive MOFs. The distinctive crystal structures and superb conductivity promise their appealing applications in electrochemical energy‐related fields. In the review, we mainly summarize representative crystal features, conducting mechanisms and recent advances in rational design and synthesis of conductive MOFs, along with their versatile applications as electrodes for electrochemical capacitors and rechargeable batteries, and as catalysts towards electrocatalysis. Finally, the involved challenges and future trends/prospects of the conductive MOFs for electrochemical energy‐related applications are further proposed.

In the past decades, pseudocapacitive materials (PCMs) for electrochemical energy storage have drawn enthusiastic attention from researchers, owing to their virtue of larger Faradaic capacitance facilitating enhanced energy densities compared to electric double-layer capacitive materials. To maximize capacitive properties without sacrificing power densities, novel design and fine fabrication of innovative PCMs with rational microstructures become of significant importance. Typically, enormous efforts have been devoted to fabricating 1D nanostructured PCMs for advanced supercapacitors, thanks to their geometrical merits facilitating the ionic/electronic transport. This review mainly focuses on the latest development and progress of 1D nanostructured PCMs for advanced super-capacitors. Firstly, typical pseudocapacitive mechanisms are discussed in detail. Secondly, physicochemical properties and intrinsic merits of 1D nanoscaled electrodes are comprehensively described. Thirdly, representative synthetic methodologies, optimization strategies and involved formation mechanisms for 1D nanodimensional PCMs are surveyed. Besides, the applications of 1D versatile PCMs including 1D conventional nanostructures, nano-arrays, core-shell nano-architectures and secondary superstructures are systematically summarized as competitive electrodes for supercapacitors. Finally, future challenges, prospects and opportunities of 1D nanostructured PCMs for next-generation supercapacitors are further proposed.