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The synthesis and characterization of an FeII/FeIII metal‐organic framework (MOF) nanocrystal with spatial heterogeneity that arises from the non‐uniform distribution of different valence states is disclosed. The FeII/FeIII‐Ni Prussian blue analog (PBA) delivers superior photocatalytic performance in the selective CO2 reduction reaction thanks to the strong FeII/FeIII coupling, with CO yield up to...
Orderly heterostructured catalysts, which integrate nanomaterials of complementary structures and dimensions into single‐entity structures, have hold great promise for sustainability applications. In this work, it is showcased that air as green reagent can trigger in situ localized phase transformation and transform the metal carbonate hydroxide nanowires into ordered heterostructured catalyst. In...
In recent years, gel‐electrolyte becomes pivotal in preventing hydrogen evolution, reducing dendrite growth, and protecting the zinc metal anode for zinc‐ion batteries. Herein, a polyvinyl alcohol‐based water–organic hybrid gel electrolyte with Agar and dimethyl sulfoxide is designed to construct the spontaneous desaturation of the solvation sheath for reducing hydrogen evolution and dendrite growth...
Sodium metal battery is supposed to be a propitious technology for high‐energy storage application owing to the advantages of natural abundance and low cost. Unfortunately, the uncontrollable dendrite growth critically hampers its practical implementation. Herein, an inorganic/organic hybrid layer of NaF/CF/CC on the surface of Na foil (IOHL‐Na) is designed and synthesized through the in situ reaction...
Preparation of holey, single‐crystal, 2D nanomaterials containing in‐plane nanosized pores is very appealing for the environment and energy‐related applications. Herein, an in situ topological transformation is showcased of 2D layered double hydroxides (LDHs) allows scalable synthesis of holey, single‐crystal 2D transition metal oxides (TMOs) nanomesh of ultrathin thickness. As‐synthesized 2D Co/NiO‐2...
Structure engineering of electrode materials can significantly improve the life cycle and rate capability of the sodium‐ion battery (SIB), yet remains a challenging task due to the lack of an effective synthetic strategy. Herein, the microstructure of VS4 hollow spheres is successfully engineered through a facile hydrothermal method. The hollow VS4 microspheres possess rich porosity and are covered...
Exploitation of atomic‐level principles to optimize the charge transfer on ultrathin 2D heterostructures is an emerging frontier in relieving the energy and environmental crisis. Herein, a facile “topological‐atom‐extraction” protocol is disclosed, i.e., selective extraction of Zn from ultrathin half‐unit‐cell ZnIn2S4 (HZIS) can embed thin In2O3 domain into 1.60 nm thick HZIS layer to create an atomically...
Tremendous efforts have been dedicated to the development of high‐performance electrochemical energy storage devices. The development of lithium‐ and sodium‐ion batteries (LIBs and SIBs) with high energy densities is urgently needed to meet the growing demands for portable electronic devices, electric vehicles, and large‐scale smart grids. Anode materials with high theoretical capacities that are...
The potassium ion batteries (KIBs) based on conversion/alloying reaction mechanisms show high theoretical capacity. However, their applications are hampered by the poor cyclability resulting from the inherent large volume variations and the sluggish kinetics during K+ repeated insertion/extraction process. Herein, taken Sb2Se3 as a model material, by rational design, nickel doped‐carbon coated Sb2...
In article number 2004925, Yan Yu, Yanglong Hou, and co‐workers report a hierarchical porous Na3V2(PO4)2O2F hollow nanosphere material with fast ionic/electronic conductivities, easy and continuous electrolyte supplement and robust electrode integrity properties, kinetically accelerated sodium‐ion storage behavior of high‐capacity, high‐rate and long‐life cycling.
Sodium‐ion batteries (SIBs) are receiving considerable attention as economic candidates for large‐scale energy storage applications. Na3V2(PO4)2O2F (NVPF) is intensively regarded as one of the most promising cathode materials for SIBs, due to its high energy density, fast ionic conduction, and robust Na+‐super‐ionic conductor (NASICON) framework. However, poor rate capability ascribed to the intrinsically...
Fe3S4 @ S @ 0.9Na3SbS4⋅0.1NaI composite cathode is prepared through one‐step wet‐mechanochemical milling procedure. During milling process, ionic conduction pathway is self‐formed in the composite due to the formation of 0.9Na3SbS4⋅0.1NaI electrolyte without further annealing treatment. Meanwhile, the introduction of Fe3S4 can increase the electronic conductivity of the composite cathode by one order...
In article number 2001989, Xianhong Rui, Yan Yu, and co‐workers develop a Li salt, lithium bisoxalatodifluorophosphate (LiDFBOP), to modify the solid‐electrolyte interphase (SEI) in fluoroethylene carbonate (FEC)–based electrolyte for lithium metal batteries. Benefiting from the synergetic effect of the LiDFBOP and FEC, a fluorinated SEI rich in LiF and LixPOyFz species is achieved, demonstrating...
Fluorinated solid‐electrolyte interphase (SEI) derived from fluoroethylene carbonate (FEC) is particularly favored for dendrite suppression in lithium metal batteries because of the high Young's modulus (≈64.9 Gpa) and low electronic conductivity (10−31 S cm−1) of LiF. However, the transportation ability of Li+ in this fluorinated SEI under high current densities is limited by the low ionic conductivity...
High‐temperature sodium ion batteries (SIBs) have drawn significant heed recently for large‐scale energy storage. Yet, conventional SIBs are in the depths of inferior charge/discharge efficiency and cyclability at elevated temperatures. Rational structure design is highly desirable. Hence, a 3D hierarchical flower architecture self‐assembled by carbon‐coated Na3V2(PO4)3 (NVP) nanosheets (NVP@C‐NS‐FL)...
Lithium (sodium)‐metal batteries are the most promising batteries for next‐generation electrical energy storage due to their high volumetric energy density and gravimetric energy density. However, their applications have been prevented by uncontrollable dendrite growth and large volume expansion during the stripping/plating process. To address this issue, the key strategy is to realize uniform lithium...
Niobium‐based oxides including Nb2O5, TiNbxO2+2.5x compounds, M–Nb–O (M = Cr, Ga, Fe, Zr, Mg, etc.) family, etc., as the unique structural merit (e.g., quasi‐2D network for Li‐ion incorporation, open and stable Wadsley– Roth shear crystal structure), are of great interest for applications in energy storage systems such as Li/Na‐ion batteries and hybrid supercapacitors. Most of these Nb‐based oxides...
Fabrication of low‐dimensional nano‐MOFs as well as nanoparticles/metal‐organic frameworks (MOFs) hybrids has sparked new scientific interests but remains a challenging task. Taking Cu3(BTC)2 as a proof of concept, it is demonstrated thats NH3⋅H2O solution of a confined pH value can readily shape the bulk Cu3(BTC)2 into nanoscale Cu3(BTC)2, beyond the need to control the crystal growth kinetics of...
Developing high power‐high energy electrochemical energy storage systems is an ultimate goal in the energy storage field, which is even more difficult but significant for low‐cost sodium ion batteries. Here, fluoride is successfully prepared by the electrostatic spray deposition (ESD) technique, which greatly expands the application scope of ESD. A two‐step strategy (solvothermal plus ESD method)...
Rapidly developed Na‐ion batteries are highly attractive for grid energy storage. Nevertheless, the safety issues of Na‐ion batteries are still a bottleneck for large‐scale applications. Similar to Li‐ion batteries (LIBs), the safety of Na‐ion batteries is considered to be tightly associated with the electrolyte and electrode/electrolyte interphase. Although the knowledge obtained from LIBs is helpful,...
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