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The zinc dendrite growth generally relies upon a “positive‐feedback” mode, where the fast‐grown tips receive higher current densities and ion fluxes. In this study, a self‐limiting polyacrylamide (PAM) hydrogel that presents negative feedback to dendrite growth is developed. The monomers are purposefully polymerized at the dendrite tips, then the hydrogel reduces the local current density and ion...
Fast recombination dynamics of photocarriers competing with sluggish surface photohole oxidation kinetics severely restricts the photoelectrochemical (PEC) conversion efficiency of photoanode. Here, a defect engineering strategy is developed to regulate photohole transfer and interfacial injection dynamics of 2D ZnIn2S4 (ZIS). Via selectively introducing substitutional Cd dopant at Zn sites of the...
Composite solid electrolytes (CSEs) consisting of polyethylene oxide (PEO) matrix and active inorganic fillers have shown great potential for practical applications. However, mechanisms of how different active fillers enhance ion transport in CSEs still remain inconclusive. In this work, the component dependencies of ionic conductivity of PEO‐based CSEs are investigated by comparing two widely investigated...
Understanding the mechanism of the rate‐dependent electrochemical performance degradation in cathodes is crucial to developing fast charging/discharging cathodes for Li‐ion batteries. Here, taking Li‐rich layered oxide Li1.2Ni0.13Co0.13Mn0.54O2 as the model cathode, the mechanisms of performance degradation at low and high rates are comparatively investigated from two aspects, the transition metal...
Stable cycling of LiCoO2 (LCO) cathode at high voltage is extremely challenging due to the notable structural instability in deeply delithiated states. Here, using the sol–gel coating method, LCO materials (LMP‐LCO) are obtained with bulk Mg‐doping and surface LiMgPO4/Li3PO4 (LMP/LPO) coating. The experimental results suggest that the simultaneous modification in the bulk and at the surface is demonstrated...
Pulmonary fibrosis, a sequela of lung injury resulting from severe infection such as severe acute respiratory syndrome‐like coronavirus (SARS‐CoV‐2) infection, is a kind of life‐threatening lung disease with limited therapeutic options. Herein, inhalable liposomes encapsulating metformin, a first‐line antidiabetic drug that has been reported to effectively reverse pulmonary fibrosis by modulating...
Lightweight and impact‐resistant materials with self‐monitoring capability are highly desired for protective applications, but are challenging to be artificially fabricated. Herein, a scalable‐manufactured aramid nanofiber (ANF)‐based composite combining these key properties is presented. Inspired by the strengthening and toughening mechanisms relying on recoverable interfaces commonly existing in...
One of the important steps for realizing artificial intelligence is identifying elementary units that are beneficial for neural network construction. A type of memristive behavior in which phase‐change nanoclusters nucleate adaptively in two adjacent dielectric layers with distinct distribution patterns is demonstrated. This memristive system responds in potentiation to increased stimulation strength...
The sluggish kinetics of sulfur conversion in the cathode and the nonuniform deposition of lithium metal at the anode result in severe capacity decay and poor cycle life for lithium–sulfur (Li–S) batteries. Resolving these deficiencies is the most direct route toward achieving practical cells of this chemistry. Herein, a vertically aligned wood–derived carbon plate decorated with Co4N nanoparticles...
Lithium‐excess manganese layered oxide Li2MnO3, attracts much attention as a cathode in Li‐ion batteries, due to the low cost and the ultrahigh theoretical capacity (≈460 mA h g−1). However, it delivers a low reversible practical capacity (<200 mA h g−1) due to the irreversible oxygen redox at high potentials (>4.5 V). Herein, heavy fluorination (9.5%) is successfully implemented in the layered...
Despite exhibiting high specific capacities, Si‐based anode materials suffer from poor cycle life as their volume change leads to the collapse of conductive network within the electrode. For this reason, the challenge lies in retaining the conductive network during electrochemical processes. Herein, to address this prominent issue, a cross‐linked conductive binder (CCB) is designed for commercially...
Despite their promised safety and mechanical flexibility, solvent‐free polymer electrolytes suffer from low Li‐ion conductivities due to poor dissociation of conducting salts and low Li+‐transference numbers due to Li+‐trapping by ether‐linkages. In this work, the authors found that oxygen vacancies carried by nanosized Al2O3 fillers preferentially promotes Li+‐conduction in poly(ethylene oxide) (PEO)...
Critical to the development of all‐solid‐state lithium‐ion batteries technology are novel solid‐state electrolytes with high ionic conductivity and robust stability under inorganic solid‐electrolyte operating conditions. Herein, by using density functional theory and molecular dynamics, a mixed oxygen‐sulfur‐based Li‐superionic conductor is screened out from the local chemical structure of β‐Li3PS...
Aqueous Zn‐MnO2 batteries using mild electrolyte show great potential in large‐scale energy storage (LSES) application, due to high safety and low cost. However, structure collapse of manganese oxides upon cycling caused by the conversion mechanism (e.g., from tunnel to layer structures for α‐, β‐, and γ‐phases) is one of the most urgent issues plaguing its practical applications. Herein, to avoid...
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