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Morphological homogeneity and interfacial traps are essential issues to achieve high‐efficiency and stable large‐area organic solar cells (OSCs). Herein, by the investigation of three quinoxaline‐based acceptors, i.e., PM6:Qx‐1, PM6:Qx‐2, and PM6:Qx‐p‐4Cl, the performance degradation in up‐scaling OSCs is explored. The inhomogeneous morphology in PM6:Qx‐2 induces a nonuniform spatial distribution...
Layered double hydroxides (LDHs), promising bifunctional electrocatalysts for overall water splitting, are hindered by their poor conductivity and sluggish electrochemical reaction kinetics. Herein, a hierarchical Cu‐doped NiCo LDH/NiCo alloy heterostructure with rich oxygen vacancies by electronic modulation is tactfully designed. It extraordinarily effectively drives both the oxygen evolution reaction...
Porous carbon has been widely focused to solve the problems of low coulombic efficiency (ICE) and low multiplication capacity of Sodium‐ion batteries (SIBs) anodes. The superior energy storage properties of two‐dimensional(2D) carbon nanosheets can be realized by modulating the structure, but be limited by the carbon sources, making it challenging to obtain 2D structures with large surface area. In...
Monolithic perovskite/silicon tandem solar cells have been attracted much attention in recent years. Despite their high performances, the stability issue of perovskite‐based devices is recognized as one of the key challenges to realize industrial application. When comes to the perovskite top subcell, the interface between perovskite and electron transporting layers (usually C60) significantly affects...
Compared with all‐small‐molecule (ASM) and other types of organic solar cells (OSCs), the small molecule donor:polymer acceptor (SMD:PA) OSCs develop much slower due to the lack of material matching rules. Herein, by changing the end‐cap substituent of the small molecule donor from ethyl (MPhS‐C2) to benzyl (MPhS‐Ph), the different selection rules of donor properties and thermal annealing (TA) treatment...
A facile strategy is developed to fabricate 3 nm RuIrOx nanocrystals anchored onto N‐doped hollow carbon for highly efficient and pH‐universal overall water splitting and alkaline seawater electrolysis. The designed catalyst exhibits much lower overpotential and superior stability than most previously reported Ru‐ and Ir‐based electrocatalysts for hydrogen/oxygen evolution reactions. It also manifests...
Under the high current density, the excessive strong adsorption of H* intermediates and H2 accumulation the catalysts are the major obstacle to the industrial application of hydrogen evolation reaction (HER) catalysts. Herein, through experimental exploration, it is found that the superaerophobic Nitrogen (N)‐doped carbon material can promote the rapid release of H2 and provide H* desorption site...
Controlling the heterogeneous nucleation of new phases is of importance in tuning the microstructures and properties of materials. However, the role of vacancy—a popular defect in materials that is hard to be resolved under conventional electron microscopy—in the heterogeneous phase nucleation remains intriguing. Here, this work captures direct in situ experimental evidences that vacancy clusters...
The development of efficient and affordable electrode materials is crucial for clean energy storage systems, which are considered a promising strategy for addressing energy crises and environmental issues. Metal phosphorous chalcogenides (MPX3) are a fascinating class of two‐dimensional materials with a tunable layered structure and high ion conductivity, making them particularly attractive for energy...
Metal halide inorganic perovskites show excellent thermal stability compared to organic‐inorganic perovskites. However, the performance of inorganic perovskite solar cells (PSCs) is far from theoretical values, together with unsatisfactory stability, mainly due to the poor interfacial properties. In this work, a facial but effective method is reported to realize high‐performance inorganic PSCs by...
High Sodium Storage Performance
In article number 2302583, Yanqing Wang and co‐workers report a powerful yet simple method for fabricating porous hard carbon via liquid salt template‐assisted dual activation. The resulting material exhibits a high specific capacity of 367 mAh g−1 at 0.05 A g−1 and 92.9% initial coulombic efficiency (ICE) and ultra‐long cycle stability of 151 mAh g−1 after 12,000 cycles...
The slow solid diffusion dynamics of sodium ions and the side‐reaction of sodium metal plating at low potential in the hard carbon anode of sodium ion batteries (SIBs) pose significant challenges to the safety manipulation of high‐rate batteries. Herein, a simple yet powerful fabricating method is reported on for “egg puff”‐like hard carbon with few N doping using rosin as a precursor via liquid salt...
Adsorption, storage, and conversion of gases (e.g., carbon dioxide, hydrogen, and iodine) are the three critical topics in the field of clean energy and environmental mediation. Exploring new methods to prepare high‐performance materials to improve gas adsorption is one of the most concerning topics in recent years. In this work, an ionic liquid solution process (ILSP), which can greatly improve the...
Heterojunctions are a promising class of materials for high‐efficiency bifunctional oxygen electrocatalysts in both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, the conventional theories fail to explain why many catalysts behave differently in ORR and OER, despite a reversible path (*O2⇋*OOH⇋*O⇋*OH). This study proposes the electron‐/hole‐rich catalytic center theory...
High‐performance microwave absorption (MA) materials have attracted more and more attention because they can effectively prevent microwave radiation and interference from electronic devices. Herein, a new type of MA composite is constructed by introducing carbon nanotubes (CNTs)‐anchored metal–organic framework derivatives (MOFDs) into a conductive carbon nanocoil (CNC) network, denoted as CNC/CNT‐MOFD...
Characterization Methods
In article number 2302208, Aimin Du, Xiangming He, and co‐workers utilize theoretical knowledge of crystal structure, structural phase transition, and crystal field theory to provide insights into the chemical‐mechanical degradation failure process of Co‐free Ni‐rich cathode materials for lithium‐ion batteries. Additionally, the authors summarize the application of commonly...
Layered Cobalt (Co)‐free Nickel (Ni)‐rich cathode materials have attracted much attention due to their high energy density and low cost. Still, their further development is hampered by material instability caused by the chemical/mechanical degradation of the material. Although there are numerous doping and modification approaches to improve the stability of layered cathode materials, these approaches...
The dendrite growth and side reactions of zinc metal anode in mildly acidic electrolytes seriously hinder the practical application of aqueous zinc–ion battery. To address these issues, an artificial protective layer of nitrogen‐doped MXene (NMX) is used to protect the zinc anode. The NMX protective layer has high conductivity and uniformly distributed zincophilic sites, which can not only homogenize...
The practical applications of aqueous zinc ion batteries are hindered by the formation of dendrites on the anode, the narrow electrochemical window of electrolyte, and the instability of the cathode. To address all these challenges simultaneously, a multi‐functional electrolyte additive of 1‐phenylethylamine hydrochloride (PEA) is developed for aqueous zinc ion batteries based on polyaniline (PANI)...
Strong and tough hydrogels are promising candidates for flexible electronics, biomedical devices, and so on. However, the conflict between improving the mechanical strength and toughness properties of polysaccharide‐based hydrogels remains unsolved. Herein, a strategy is proposed to produce a hierarchically structured cellulose hydrogel that combines solution annealing and dual cross‐linking treatment...
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