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The eco‐friendliness, safety, and affordability of aqueous potassium batteries (AKIBs) have made them popular for large‐scale energy storage devices. However, the cycling and rate performance of research materials, particularly cobalt hexacyanoferrate, have yet to meet satisfactory standards. Herein, a room‐temperature drafted K1.66Fe0.25Co0.75[Fe(CN)6]·0.83H2O (KFCHCF) sample is reported using an...
Reversible three‐electron redox of Cr3+/Cr6+ in layered cathode materials for rechargeable batteries is very attractive in layered cathode materials, which leads to high capacity and energy density for rechargeable batteries. However, the poor reversibility and Cr‐ion migration make it very challenging. In this work, by introducing V ions into tetrahedral sites of layer‐structured NaCrO2, reversible...
Aqueous zinc ion batteries (ZIBs), especially those with self‐charging properties, have been promisingly developed in recent years. Yet, most inorganic materials feature high redox potential, which limit their development in the self‐charging field. To achieve this target, by pre‐embedding potassium ions into δ‐MnO2 to reduce the energy barrier in oxygen adsorption, the first application of MnO2 in...
Rational design and development of highly efficient hydrogen evolution reaction (HER) electrocatalysts is of great significance for the development of green water electrolysis hydrogen production technology. Ru‐engineered 1D PtCo‐Ptrich nanowires (Ru‐PtrichCo NWs) are fabricated by a facile electrodeposition method. The rich Pt surface on 1D Pt3Co contributes to the fully exposed active sites and...
Perovskite oxides stand out as emerging oxygen evolution reaction (OER) catalysts on account of their effective electrocatalytic performance and low costs. Nevertheless, perovskite oxides suffer from severe bubble overpotential and inhibited electrochemical performance in large current densities due to their small specific surface areas and structural compactness. Herein, the study highlights the...
Stacking order plays a key role in defining the electrochemical behavior and structural stability of layer‐structured cathode materials. However, the detailed effects of stacking order on anionic redox in layer‐structured cathode materials have not been investigated specifically and are still unrevealed. Herein, two layered cathodes with the same chemical formula but different stacking orders: P2‐Na...
Sodium‐ion batteries (SIBs) have attracted wide interest for energy storage because of the sufficient sodium element reserve on the earth; however, the electrochemical performance of SIBs cannot achieve the requirements so far, especially, the limitation of cathode materials. Here, a kilogram‐scale route to synthesize Na2FePO4F/carbon/multi‐walled carbon nanotubes microspheres (NFPF@C@MCNTs) composite...
Single‐atom catalysts (SACs) have attracted tremendous research interest due to their unique atomic structure, maximized atom utilization, and remarkable catalytic performance. Among the SACs, the carbon‐supported SACs have been widely investigated due to their easily controlled properties of the carbon substrates, such as the tunable morphologies, ordered porosity, and abundant anchoring sites. The...
To develop high‐performance supercapacitors, the negative electrode is at present viewed as one of the most challenging tasks for obtaining the next‐generation of energy storage devices. Therefore, in this study, a polyoxometalate‐based coordination polymer [Zn(itmb)3H2O][H2SiW12O40]·5H2O (1) is designed and prepared by a simple hydrothermal method for constructing a high‐capacity negative electrode...
Single‐atom catalysts (SACs) with specific coordination environment are expected to be efficient electrocatalysts for oxygen reduction reaction (ORR). Herein, NiN4C10 coordination site is constructed through encapsulating Ni2+ into the cavity of ZIF‐8 as a self‐sacrificing precursor and anchoring it on 3D N‐doped carbon frameworks. The NiN4C10 catalyst shows excellent ORR activity and stability,...
The Mott–Schottky heterojunction formed at the interface of ultrafine metallic Ni and semiconducting V2O3 nanoparticles is constructed, and the heterojunctions are “knitted” into the tulle‐like monolayer nanosheets on nickel foam (NF). The greatly reduced particle sizes of both Ni and V2O3 on the Mott–Schottky heterojunction highly enhance the number of Schottky heterojunctions per unit area of the...
Developing robust and highly efficient electrocatalysts for oxygen evolution reaction (OER) is critical for renewable, secure, and emission‐free energy technologies. Perovskite Ba0.5Sr0.5Co0.8Fe0.2O3‐δ (BSCF) has emerged as a promising OER electrocatalyst with desirable intrinsic activity. Inspired by the factor that substituting in transition‐metal sublattice of the perovskite can further optimize...
Rational design and synthesis of bifunctional electrocatalysts with high efficiency and low‐cost for overall water splitting is still a challenge. A simple approach is reported to prepare a phosphorus and yttrium codoped cobalt hydroxyfluoride (YP‐Co(OH)F) nanoarray on nickel foam, which displays high‐performance for both hydrogen evolution reaction (HER) and oxygen evolution reaction in alkaline...
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