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Despite incorporation of organic groups into silica‐based aerogels to enhance their mechanical flexibility, the wide temperature reliability of the modified silicone aerogel is inevitably degraded. Therefore, facile synthesis of soft silicone aerogels with wide‐temperature stability remains challenging. Herein, novel silicone aerogels containing a high content of Si are reported by using polydimethylvinylsiloxane...
Aqueous Zn‐ion batteries are the ideal candidate for large‐scale energy storage systems owing to their high safety and low cost. However, the uncontrolled deposition and parasitic reaction of Zn metal anode hinder their commercial application. Here, the 2D metal‐organic‐framework (MOF) nanoflakes covered on the surface of Zn are proposed to enable dendrite‐free for long lifespan Zn metal batteries...
Lead mixed‐halide perovskites offer tunable bandgaps for optoelectronic applications, but illumination‐induced phase segregation can quickly lead to changes in their crystal structure, bandgaps, and optoelectronic properties, especially for the Br–I mixed system because CsPbI3 tends to form a non‐perovskite phase under ambient conditions. These behaviors can impact their performance in practical applications...
MnO2‐based material is one of the most promising cathode candidates of aqueous zinc‐ion batteries (ZIBs), but its commercialization is hindered by the sluggish reaction kinetics and poor structural stability. Herein, a hierarchical framework consisting of core–shell structured carbon nanotubes@K‐birnessite‐MnO2 enwrapped by graphene/carbon black bicomponent networks (CNT@KMO@GC) via a simple method...
Aqueous Zinc‐Ion Batteries
In article number 2104557, Lei Li and co‐workers develop a solution‐processed method to fabricate a hierarchical K‐birnessite‐MnO2‐carbon framework vividly depicted by the dragon flying in the clouds. The dragon with scales represents carbon nanotubes decorated by K‐birnessite‐MnO2 porous nanoflakes, the clouds stand for graphene, and the pearls in the dragon claws are carbon...
In situ monitoring of hydrogen peroxide (H2O2) during its production process is needed. Here, an electrochemical H2O2 sensor with a wide linear current response range (concentration: 5 × 10−8 to 5 × 10−2 m), a low detection limit (32.4 × 10−9 m), and a high sensitivity (568.47 µA mm−1 cm−2) is developed. The electrocatalyst of the sensor consists of cobalt nanoparticles and atomic Co‐Nx moieties anchored...
Microbial fuel cells (MFCs) can convert organics in wastewater directly to electricity, and improving oxygen reduction reaction (ORR) performance is critical to their development and future applications. Electrocatalytic ORR performance is determined by the intrinsic activity and accessible amounts of active sites. A surface nitrogen‐enriched carbon coaxial nanocable (NCCN) is applied as an ORR electrocatalyst...
The construction of active sites with intrinsic oxygen evolution reaction (OER) is of great significance to overcome the limited efficiency of abundant sustainable energy devices such as fuel cells, rechargeable metal–air batteries, and in water splitting. Anionic regulation of electrocatalysts by modulating the electronic structure of active sites significantly promotes OER performance. To prove...
Anionic regulation of NiFe (oxy)sulfide catalysts is proposed by Qiang Zhang, Bo‐Quan Li, and co‐workers in article number 1700610, through modulating the electronic structure of water oxidization active sites. Such antagonistic S/O anions polarize the metal active sites, rendering the reactivity of electrochemical water oxidation.
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