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Magnesium‐ion batteries are widely studied for its environmentally friendly, low‐cost, and high volumetric energy density. In this work, the solvothermal method is used to prepare titanium dioxide bronze (TiO2‐B) nanoflowers with different nickel (Ni) doping concentrations for use in magnesium ion batteries as cathode materials. As Ni doping enhances the electrical conductivity of TiO2‐B and promotes...
Vanadium trioxide (V6O13) cathode has recently aroused intensive interest for aqueous zinc‐ion batteries (AZIBs) due to their structural and electrochemical diversities. However, it undergoes sluggish reaction kinetics and significant capacity decay during prolonged cycling. Herein, an oxygen‐vacancy‐reinforced heterojunction in V6O13−x/reduced graphene oxide (rGO) cathode is designed through electrostatic...
Janus fabrics with moisture management ability have great potential for improving both physiological and psychological comfort of human body. However, current methods for creating Janus fabrics are typically complex, environmentally unfriendly, and costly. More importantly, the prepared Janus fabrics have demonstrated insufficient mechanical properties and poor fastness, rendering them unsuitable...
Increasing the relative dielectric constant is a constant pursuit of organic semiconductors, but it often leads to multiple changes in device characteristics, hindering the establishment of a reliable relationship between dielectric constant and photovoltaic performance. Herein, a new non‐fullerene acceptor named BTP‐OE is reported by replacing the branched alkyl chains on Y6‐BO with branched oligoethylene...
Optical encryption technologies are widely used in information security, whereas the technology with one single optical secret key can be easily cracked. Here, a triple encryption is reported, which hides patterned information in excitation‐dependent allochroic materials with long afterglow, enhancing the security level. The allochroic materials are based on a uniaxial co‐assembly structure of cellulose...
Polyaniline (PANI) is a promising cathode material for aqueous rechargeable zinc batteries (ARZBs), mainly benefitting from its good electrical conductivity. The high conductivity of PANI requires high doping level, yet the introduced nonactive dopants (e.g., SO42−) limit the gravimetric capacity of PANI (usually < 180 mAh g−1). Herein, an electro‐active dopant (decavanadate anion, V10O286−) is...
The emerging potassium‐tellurium (K‐Te) battery system is expected to realize fast reaction kinetics and excellent rate performance due to the exceptional electrical conductivity of Te. However, there has been a lack of fundamental knowledge about this new K‐Te system, including the reaction mechanism and cathode structure design. Herein, a two‐step reaction pathway from Te to K2Te3 and ultimately...
The potassium‐ion battery (PIB) is an emerging energy storage technology due to its potential low cost and reasonably high energy density. However, PIB suffers from severe potassium (K) dendrites growth and even short circuiting caused by the high reactivity of K metal. To address these challenges, this work develops a robust composite gel polymer electrolyte (CGPE), named poly(vinylidene fluoride‐hexafluoropropylene)...
Potassium Metal Anodes
In article number 2107186, Jian Liu and co‐workers design a robust composite gel polymer electrolyte to achieve a long life of over 1,200 h for symmetrical potassium (K) cells. The remarkable stability can be attributed to the suppressed K dendrite growth, enhanced structural integrity, and electrochemical stability by polyacrylonitrile nanofibers.
The atomic‐thin 2D semiconductors have emerged as plausible candidates for future optoelectronics with higher performance in terms of the scaling process. However, currently reported 2D photodetectors still have huge shortcomings in ultraviolet and especially visible‐blind wavelengths. Here, a simple and nontoxic surfactant‐assisted synthesis strategy is reported for the controllable growth of atomically...
In article number 1906435, Qing Chen and co‐workers obtain high‐index {01} facets of ZnO during wet chemical etching of the (000) O‐terminated surface of ZnO and also provide the direct experimental evidence of the micromasking mechanism for the hillocks formation via an in situ liquid cell transmission electron microscopy study.
Special surface plays a crucial role in nature as well as in industry. Here, the surface morphology evolution of ZnO during wet etching is studied by in situ liquid cell transmission electron microscopy and ex situ wet chemical etching. Many hillocks are observed on the (000) O‐terminated surface of ZnO nano/micro belts during in situ etching. Nanoparticles on the apex of the hillocks are observed...
Infrared (IR) photodetectors are finding diverse applications in imaging, information communication, military, etc. 2D metal chalcogenides (2DMCs) have attracted increasing interest in view of their unique structures and extraordinary physical properties. They have demonstrated outstanding IR detection performance including high responsivity and detectivity, high on/off ratio, fast response rate,...
Silicon photonics has demonstrated great potential in ultrasensitive biochemical sensing. However, it is challenging for such sensors to detect small ions which are also of great importance in many biochemical processes. A silicon photonic ion sensor enabled by an ionic dopant–driven plasmonic material is introduced here. The sensor consists of a microring resonator (MRR) coupled with a 2D restacked...
Polymeric nanoparticles coated with membrane of intact red blood cells have emerged as biomimetic toxin nanosponges (RBC‐NS) that absorb and neutralize bacterial virulence factors associated with numerous bacterial infections. Despite its promise, a clear correlation between in vitro neutralization of complex bacterial toxins and in vivo therapeutic efficacy remains elusive. In this study, the whole...
Layered lithium transition‐metal oxides, with large capacity and high discharge platform, are promising cathode materials for Li‐ion batteries. However, their high‐rate cycling stability still remains a large challenge. Herein, hierarchical LiNi1/3Co1/3Mn1/3O2 polyhedron assemblies are obtained through in situ chelation of transition metal ions (Ni2+, Co2+, and Mn2+) with amide groups uniformly distributed...
Homogeneous ultrasmall T‐Nb2O5 nanocrystallites encapsulated in 1D carbon nanofibers (T‐Nb2O5/CNFs) are prepared through electrospinning followed by subsequent pyrolysis treatment. In a Na half‐cell configuration, the obtained T‐Nb2O5/CNFs with the merits of unique microstructures and inherent pseudocapacitance, deliver a stable capacity of 150 mAh g−1 at 1 A g−1 over 5000 cycles. Even at an ultrahigh...
In article number 1603103, Yue Zhang and co‐workers demonstrate light tuning of the surface potential of two dimensional MoS2 which is attributed to the photovoltaic effect, the produced numbers of photogenerated electrons by incident light will transfer between the metal substrate and MoS2, then form the local electric field at the interface. The local electric field can change the numbers of trapped...
Here surface potential of chemical vapor deposition (CVD) grown 2D MoS2 with various layers is reported, and the effect of adherent substrate and light illumination on surface potential of monolayer MoS2 are investigated. The surface potential of MoS2 on Si/SiO2 substrate decreases from 4.93 to 4.84 eV with the increase in the number of layer from 1 to 4 or more. Especially, the surface potentials...
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