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The LiCoO2 (LCO) cathode is foreseen for extensive commercial applications owing to its high specific capacity and stability. Therefore, there is considerable interest in further enhancing its specific capacity by increasing the charging voltage. However, single‐crystal LCO suffers from a significant capacity degradation when charged to 4.5 V due to the irreversible phase transition and unstable structure...
Sodium‐ion batteries (SIBs) have gradually become one of the most promising energy storage techniques in the current era of post‐lithium‐ion batteries. For anodes, transitional metal selenides (TMSe) based materials are welcomed choices , owing to relatively higher specific capacities and enriched redox active sites. Nevertheless, current bottlenecks are blamed for their poor intrinsic electronic...
Superlattice Films
Work function difference induces spontaneous charge donation and band bending at the interfaces of superlattices, which causes optimization effects of modulation doping and energy filtering, leading to remarkably enhanced thermoelectric performances. This optimizing strategy is successfully elucidated in 1T′‐MoTe2/Bi2Te3 superlattice films. Meanwhile, the rational manipulation of...
Interfacial charge effects, such as band bending, modulation doping, and energy filtering, are critical for improving electronic transport properties of superlattice films. However, effectively manipulating interfacial band bending has proven challenging in previous studies. In this study, (1T′‐MoTe2)x(Bi2Te3)y superlattice films with symmetry‐mismatch were successfully fabricated via the molecular...
With the pursuit of high‐energy‐density for lithium‐ion batteries (LIBs), the hidden safety problems of batteries have gradually emerged. LiNixCoyMn1−x−yO2 (NCM) is considered as an ideal cathode material to meet the urgent needs of high‐energy‐density batteries. However, the oxygen precipitation reaction of NCM cathode at high temperature brings serious safety concerns. In order to promote high‐safety...
Atomic understanding of a chemical reaction can realize the programmable design and synthesis of desired products with specific compositions and structures. Through directly monitoring the phase transition and tracking the dynamic evolution of atoms in a chemical reaction, in situ transmission electron microscopy (TEM) techniques offer the feasibility of revealing the reaction kinetics at the atomic...
Tuning the bandgap of nanoporous graphene is desirable for applications such as the charge transport layer in organic‐hybrid devices. The holy grail in the field is the ability to synthesize 2D nanoporous graphene with variable pore sizes, and hence tunable band gaps. Herein, the on‐surface synthesis of nanoporous graphene with variable bandgaps is demonstrated. Two types of nanoporous graphene are...
The catalytic properties of supported metal heterostructures critically depend on the design of metal sites. Although it is well‐known that the supports can influence the catalytic activities of metals, precisely regulating the metal–support interactions to achieve highly active and durable catalysts still remain challenging. Here, the authors develop a support effect in the oxide‐supported metal...
The delivery of tumor‐suppressive noncoding RNAs (ncRNAs) including short ncRNAs (i.e., miRNAs) and long ncRNAs (lncRNAs) is put forward to treat tumors. In this work, novel rodlike supramolecular nanoassemblies (CNC @CB[8] @ PGEA) of degradable poly(aspartic acid) (PAsp) derivatives‐grafted cellulose nanocrystals (CNCs) and hydroxyl‐rich polycations (ethanolamine‐functionalized poly(glycidyl methacrylate),...
The experimental observation of band‐to‐band tunneling in novel tunneling field‐effect transistors utilizing a monolayer of MoS2 as the conducting channel is demonstrated. Our results indicate that the strong gate‐coupling efficiency enabled by two‐dimensional materials, such as monolayer MoS2, results in the direct manifestation of a band‐to‐band tunneling current and an ambipolar transport.
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