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Aqueous batteries have garnered significant attention in recent years as a viable alternative to lithium‐ion batteries for energy storage, owing to their inherent safety, cost‐effectiveness, and environmental sustainability. This study offers a comprehensive review of recent advancements, persistent challenges, and the prospects of aqueous batteries, with a primary focus on energy density compensation...
Materials with various single‐transition metal atoms dispersed in nitrogenated carbons (M─N─C, M = Fe, Co, and Ni) are synthesized as cathodes to investigate the electrocatalytic behaviors focusing on their enhancement mechanism for performance of Li–S batteries. Results indicate that the order of both electrocatalytic activity and rate capacity for the M─N─C catalysts is Co > Ni > Fe, and the...
The in situ free carbon generated in polymer‐derived ceramics (PDCs) plays a crucial role in their unique microstructure and resultant properties. This study advances a new phenomenon of graphitization of PDCs. Specifically, whether in micro‐/nanoscale films or millimeter‐scale bulks, the surface/interface radically changes the fate of carbon and the evolution of PDC nanodomains, promotes the graphitization...
Membrane technology has shown a viable potential in conversion of liquid‐waste or high‐salt streams to fresh waters and resources. However, the non‐adjustability pore size of traditional membranes limits the application of ion capture due to their low selectivity for target ions. Recently, covalent organic frameworks (COFs) have become a promising candidate for construction of advanced ion separation...
As one of the most competitive candidates for large‐scale energy storage, zinc–air batteries (ZABs) have attracted great attention due to their high theoretical specific energy density, low toxicity, high abundance, and high safety. It is highly desirable but still remains a huge challenge, however, to achieve cheap and efficient electrocatalysts to promote their commercialization. Recently, Fe‐based...
Flexible Nanogenerators
In article number 2103161, Yang Cao and co‐workers describe a new all‐organic flexible nanogenerator with expanded polytetrafluoroethylene (ePTFE)‐based ferroelectret and fabric‐based electrodes. Like a charge‐spring of three deformable dipoles, the outer electret‐plus‐electrode double layers form active device layers with deformable electric dipoles that strongly contribute...
Due to their electrically polarized air‐filled internal pores, optimized ferroelectrets exhibit a remarkable piezoelectric response, making them suitable for energy harvesting. Expanded polytetrafluoroethylene (ePTFE) ferroelectret films are laminated with two fluorinated‐ethylene‐propylene (FEP) copolymer films and internally polarized by corona discharge. Poly(3,4‐ethylenedioxythiophene):poly(styrene...
Sodium metal is regarded as one of the most prospective next‐generation anodes material owing to its high theoretical capacity, low redox potential, low cost, and natural abundance. Its most notable problem is the dendrite growth during Na plating/striping, which causes not only the safety concern but also the generation of inactive Na. Here, it is demonstrated that 2D carbon nanosheets embedded by...
Sodium‐ion batteries (SIBs) have huge potential for applications in large‐scale energy storage systems due to their low cost and abundant sources. It is essential to develop new electrode materials for SIBs with high performance in terms of energy density, cycle life, and cost. Metal binary compounds that operate through conversion reactions hold promise as advanced anode materials for sodium storage...
Novel electrode materials consisting of hollow cobalt sulfide nanoparticles embedded in graphitic carbon nanocages (HCSP⊂GCC) are facilely synthesized by a top‐down route applying room‐temperature synthesized Co‐based zeolitic imidazolate framework (ZIF‐67) as the template. Owing to the good mechanical flexibility and pronounced structure stability of carbon nanocages‐encapsulated Co9S8, the as‐obtained...
Alloy anodes have shown great potential for next‐generation lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs). However, these applications are still limited by inherent huge volume changes and sluggish kinetics. To overcome such limitations, graphene‐protected 3D Sb‐based anodes grown on conductive substrate are designed and fabricated by a facile electrostatic‐assembling and subsequent...
Graphene‐protected 3D Sb‐based anodes are designed and fabricated by Y. Yu and co‐workers using a facile electrostatic assembly and confinement replacement method. On page 6026, in this fabrication, commercial nickel foam is used as both a 3D growth substrate and as a reductant for converting Sb3+ to Sb. When evaluated as binder‐free anodes for Li‐ion and sodium‐ion batteries, the obtained 3D electrodes...
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