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Water stability is a crucial issue always addressed for commercial practical application of perovskite quantum dots (QDs). Recent advances in ligand engineering for in situ synthesis of water‐stable perovskite QDs have attracted growing interest. However, the exact mechanism remains unclear. Here, the function of 4‐bromobutyric acid (BBA) and oleylamine (OLA) is systematically studied in water‐stable...
Iron‐based sulfate cathodes of alluaudite Na2+2δFe2−δ(SO4)3 (NFS) in sodium‐ion batteries with low cost, steady cycling performance, and high voltage are promising for grid‐scale energy storage systems. However, the poor electronic conductivity and the limited understanding of the phase‐evolution of precursors hinder obtaining high‐rate capacity and the pure phase. Distinctive NFS@C@n%CNTs (n = 1,...
Vanadium‐based oxides have attracted much attention because of their rich valences and adjustable structures. The high theoretical specific capacity contributed by the two‐electron‐transfer process (V5+/V3+) makes it an ideal cathode material for aqueous zinc‐ion batteries. However, slow diffusion kinetics and poor structural stability limit the application of vanadium‐based oxides. Herein, a strategy...
The systematical understanding of metal‐dependent activity in electrocatalyzing oxygen reduction reaction (ORR), a vital reaction with sluggish kinetics for zinc‐air batteries, remains quite unclear. An atomic and spatial engineering modulating ORR activity over hollow carbon quasi‐sphere (HCS) confined in a series of single M‐N (M = Cu, Mn, Ni) sites is reported here. Based on the theoretical prediction...
Lithium‐Ion Batteries
The effect of silicon particle size on its physical, chemical, and mechanochemical behaviors has been benchmarked via multiple lab‐ and synchrotron‐based characterizations. The significant differences caused by particle size in the composition transition, structure transition, particle pulverization, electrode expansion, and surface chemistry, are strongly related to their electrochemical...
High‐capacity silicon has been regarded as one of the most promising anodes for high‐energy lithium‐ion batteries. However, it suffers from severe volume expansion, particle pulverization, and repeated solid electrolyte interphase (SEI) growth, which leads to rapid electrochemical failure, while the particle size also plays key role here and its effects remain elusive. In this paper, through multiple‐physical,...
The comparatively poor endurance of Ni‐rich cathode materials restricts their application in high‐energy lithium‐ion batteries. A thorough understanding of the degradation characteristics of such materials under complex electrochemical aging protocols is required to further improve their reliability. In this work, the irreversible capacity losses of LiNi0.8Mn0.1Co0.1O2 under different electrochemical...
Solid‐state electrolytes (SSEs) are the core material of solid‐state lithium metal batteries (SLMBs), which are being researched urgently owing to their high energy and safety. Both high ionic conductivity and excellent cycling stability remain the primary goal of solid‐state electrolytes. Herein, inspired by K+/Na+ ion channels in cell membrane of eukaryotes, a novel hollow UiO‐66 with biomimetic...
The next generation of high‐energy‐density storage devices is expected to be rechargeable lithium metal batteries. However, unstable metal‐electrolyte interfaces, dendrite growth, and volume expansion will compromise lithium metal batteries (LMB) safety and life. A simple drop‐casting method is used to create a double‐layer functional interface composed of inorganic mesoporous TiO2 and F‐rich organics...
By virtue of low cost, eco‐friendliness, competitive gravimetric energy density, and intrinsic safety, more and more attention has increasingly focused on aqueous zinc ion batteries (AZIBs) as a promising alternative for scalable energy storage. However, plagued by a complex interfacial process, sluggish dynamics, lability of electrodes and electrolytes, insufficient energy density, and poor cycle...
Transition metal oxides are considered promising anode materials for next‐generation lithium‐ion and sodium‐ion batteries (LIBs and SIBs) because of their high theoretical capacities; however, their practical application is limited by the detrimental large volume expansion that occurs upon cycling. In this work, a rationally designed TiO2@Fe@FeOx nanocomposite encapsulated by a TiO2 shell with unique...
The development of high‐efficiency lithium‐ion battery electrodes composed of recycled materials is crucial for the commercialization of retired batteries, but it remains a significant barrier. The usage and recycling of spent graphite are encouraged by the huge number of batteries that are going to be dismantled. Here, an anode made of phosphorus‐doped Ni/NiO yolk‐shell nanospheres embedded on wasted...
Issues with unstable SEI formation and uncontrollable lithium dendrite growth impede the practical use of lithium anode in high‐energy batteries. Herein, a lithiophilic carbon channel on separator is designed to regulate lithium deposition behavior. The designed channel is formed by carbon nanosheet with cubic cavity (CNCC) prepared by hard template method. The CNCC with a large specific surface area...
Owing to the high specific capacities, high electrochemical activity, and various electronic properties, transition metal selenides are considered as promising anodes for lithium‐ and sodium‐ion storage. However, poor electronic conductivity and huge volume expansion during cycling are still responsible for their restricted electrochemical performance. Herein, CoSe hollow polyhedron anchoring onto...
Metal oxide anode materials generally possess high theoretical capacities. However, their further development in potassium‐ion batteries (KIBs) is limited by self‐aggregation and large volume fluctuations during charge/discharge processes. Herein, hierarchical MnCo2O4 hollow microspheres (ts‐MCO HSs) with three porous shells that consist of aggregated primary nanoparticles are fabricated as anode...
Ni‐rich Li‐ion cathode materials promise high energy density, but are limited in power density and cycle life, resulting from their poor dynamic characteristics and quick degradation. On the other hand, capacitor electrode materials promise high power density and long cycle life but limited capacities. A joint energy storage mechanism of these two kinds is performed in the material‐compositional level...
Fluidic flow behaviors in microfluidics are dominated by the interfaces created between the fluids and the inner surface walls of microchannels. Microchannel inner surface designs, including the surface chemical modification, and the construction of micro‐/nanostructures, are good examples of manipulating those interfaces between liquids and surfaces through tuning the chemical and physical properties...
To address the non‐negligible volume expansion and the inherent poor electronic conductivity of silica (SiO2) material, microsphere‐like SiO2/MXene hybrid material is designed and successfully synthesized through the combination of the Stöber method and spray drying. The SiO2 nanoparticles are firmly anchored on the laminated MXene by the bonding effect, which boosts the structural stability during...
The advances in bioinformatics and biomedicine have promoted the development of biomedical imaging and theranostic systems to respectively extend the endogenous biomarker imaging with high contrast and enhance the therapeutic effect with high efficiency. The emergence of biomacromolecule‐functionalized aggregation‐induced emitters (AIEgens), utilizing AIEgens, and biomacromolecules (nucleic acids,...
High quality p–n junctions based on 2D layered materials (2DLMs) are urgent to exploit, because of their unique properties such as flexibility, high absorption, and high tunability which may be utilized in next‐generation photovoltaic devices. Based on transfer technology, large amounts of vertical heterojunctions based on 2DLMs are investigated. However, the complicated fabrication process and the...
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