Catalytic and Dual‐Conductive Matrix Regulating the Kinetic Behaviors of Polysulfides in Flexible Li–S Batteries

Herein, a catalytic and dual‐conductive matrix is proposed, in which an integrated g‐C3N4 film and a conductive polymer shell are simultaneously introduced to a carbon cloth, forming a multifunctional substrate for a flexible sulfur cathode (S@CP/g‐C3N4@CC). This well‐designed S@CP/g‐C3N4@CC composite exhibits superior flexibility and good electrochemical...

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Two Birds with One Stone: High Efficiency and Low Synthetic Cost for Benzotriazole‐Based Polymer Solar Cells by a Simple Chemical Approach

To generate cost‐efficient and high‐performanced polymers, a simple chemical steric effect (SE) is introduced to benzothiophene (BDT)‐based side chains. The polymeric crystallinity and miscibility are rebalanced and a power conversion efficiency (PCE) of 14.53% is achieved. Thus, the SE applied in crystalline polymer pave an easier and cheaper route...

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Masthead: (Adv. Energy Mater. 34/2020)

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Interfaces in Garnet‐Based All‐Solid‐State Lithium Batteries

Garnet‐based all‐solid‐state lithium batteries will be promising next generation energy storage system once the interfacial issues are solved. The interfacial issues include the large interfacial resistance at the initial state and the mechanical degradation of both anodic and cathodic interfaces during the subsequent cycling process. Ingenious architecture...

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TiO2 Colloid‐Spray Coated Electron‐Transporting Layers for Efficient Perovskite Solar Cells

This study reports the deposition of a TiO2 electron transporting layer for perovskite solar cells by spray coating using a stable TiO2 colloidal aqueous solution, which is synthesized via the self‐condensation of a titanium peroxide complex under hydrothermal conditions. Although the whole fabrication process for the cells is performed at 100 °C, 22.7%...

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Two Birds with One Stone: High Efficiency and Low Synthetic Cost for Benzotriazole‐Based Polymer Solar Cells by a Simple Chemical Approach

To generate cost‐efficient and high‐performanced polymers, a simple chemical steric effect (SE) is introduced to benzothiophene (BDT)‐based side chains. The polymeric crystallinity and miscibility are rebalanced and a power conversion efficiency (PCE) of 14.53% is achieved. Thus, the SE applied in crystalline polymer pave an easier and cheaper route...

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The Concept of Negative Capacitance in Ionically Conductive Van der Waals Ferroelectrics

Cu ions can be reversibly driven across a single van der Waals gap by the local electrical field of a scanning probe microscopy tip in ferrielectric CuInP2S6 crystals. The resulting polarization hysteresis shows negative slopes (dP/dE < 0), and a new mechanism for negative transient capacitance in ferroelectric materials is proposed based on an ionic...

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Efficient and Stable Colloidal Quantum Dot Solar Cells with a Green‐Solvent Hole‐Transport Layer

A novel BDT‐based random polymeric hole‐transporting layer (asy‐ranPBTBDT) is developed with irregularity from asymmetric substitution and random copolymerization. The resulting low crystallinity from the irregularity leads to superior solubility capacity and suppressed charge recombination and morphological changes. Therefore, the colloidal quantum...

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Insights into the Electrochemical Reduction Products and Processes in Silica Anodes for Next‐Generation Lithium‐Ion Batteries

Silica as a sustainable and low‐cost anode for Li‐ion batteries is engineered for its direct use. The pathway for its electrochemical reduction is uncovered, leading to a significant reduction in the pretreatment time from 100s of hours to 13 h. A stable capacity of 635 mAh g−1 is achieved for silica anodes, which is significantly higher than that of...

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Covalent Organic Frameworks as Negative Electrodes for High‐Performance Asymmetric Supercapacitors

New redox‐functionalized Hex‐Aza covalent organic frameworks (Hex‐Aza‐COFs) are synthesized and applied as negative electrodes in asymmetric supercapacitors. These Hex‐Aza‐COFs show a specific capacitance of 585 F g−1 for Hex‐Aza‐COF‐2 and 663 F g−1 for Hex‐Aza‐COF‐3 in a three‐electrode configuration at 1 A g−1. The asymmetric device composed of Hex‐Aza‐COF...

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