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Biomass‐based energy storage devices (BESDs) have drawn much attention to substitute traditional electronic devices based on petroleum or synthetic chemical materials for the advantages of biodegradability, biocompatibility, and low cost. However, most of the BESDs are almost made of reconstructed plant materials and exogenous chemical additives which constrain the autonomous and widespread advantages...
More and more attention has been paid to lithium–sulfur (Li─S) batteries due to their high energy density and low cost. However, the intractable “shuttle effect” and the low conductivity of S and its reaction product, Li2S, compromise battery performance. To address the inherent challenges, a hollow composite catalyst as a separator coating material is designed, in which CoFe alloy is embedded in...
Integrating a graphene transparent electrode (TE) matrix with driving circuits is essential for the practical use of graphene in optoelectronics such as active‐matrix organic light‐emitting diode (OLED) display, however it is disabled by the transport of carriers between graphene pixels after deposition of a semiconductor functional layer caused by the atomic thickness of graphene. Here, the carrier...
Flexible aqueous zinc batteries are promising candidates as safe power sources for fast‐growing portable and wearable electronics. However, the low working voltage, poor rate capability, and cycling stability have greatly restricted their development and applications. Here, a new family of flexible bimetallic phosphide/carbon nanotube hybrid fiber electrodes with unique macroscopic microcrack structure...
Flexible Aqueous Zinc Batteries
In article number 2206338, Yang Zhao and co‐workers report a high‐performance flexible aqueous zinc battery based on hybrid fiber electrode with hierarchical microcrack structure. The unique structure can not only facilitate the penetration of electrolyte for fast charge transfer, but also relieve the stress concentrations under deformations. The fabricated flexible...
The fiber‐shaped aqueous battery (FSAB) has the advantages of flexibility, portability and safety making it promising for energy storage applications. In particular, FSABs based on metal wire current collectors with good electrical conductivity can provide excellent energy storage properties. However, the low adhesion caused by the smooth surface of the metal wire and the unavailability of many electrochemically...
Alkali metals are regarded as the most promising candidates for advanced anode for the next‐generation batteries due to their high specific capacity, low electrochemical potential, and lightweight. However, critical problems of the alkali metal anodes, especially dendrite formation and interface stabilization, remain challenging to overcome. The solid electrolyte interphase (SEI) is a key factor affecting...
The fabrication of heterostructures has inspired extensive interest in promoting the performance of solar cells or solar fuel production, but it is still challenging for nitrides to prepare structurally ordered heterostructures. Herein, one nickel nitride‐based heterostructure composed of 1D Ni0.2Mo0.8N nanorods and 0D Ni3N nanoparticles (denoted as NiMoN/NiN) is reported to exhibit significantly...
Electrochemical reduction of CO2 into formate product is considered the most practical significance link in the carbon cycle. Developing cheap and efficient electrocatalysts with high selectivity for formate on a wide operated potential window is desirable yet challenging. Herein, nanoporous ordered intermetallic tin–tellurium (SnTe) is synthesized with a greater reduction performance for electrochemical...
Hydrogen economy is imagined where excess electric energy from renewable sources stored directly by electrochemical water splitting into hydrogen is later used as clean hydrogen fuel. Electrocatalysts with the superhigh current density (1000 mA cm−2‐level) and long‐term durability (over 1000 h), especially at low overpotentials (<300 mV), seem extremely critical for green hydrogen from experiment...
Advanced inorganic solid electrolytes (SEs) are critical for all‐solid‐state alkaline metal batteries with high safety and high energy densities. A new interphase design to address the urgent interfacial stability issues against all‐solid‐state sodium metal batteries (ASSMBs) is proposed. The grain boundary phase of a Mg2+‐doped Na3Zr2Si2PO12 conductor (denoted as NZSP‐xMg) is manipulated to introduce...
As high performance and safety alternatives to the batteries with organic electrolytes, aqueous zinc‐based batteries are still far from satisfactory in practical use because of the limitation of the intercalation reaction mechanism and the strict requirements for the cathodes. Very recently, zinc‐based dual electrolytic batteries (DEBs), where the cathode and anode are both based on reversible electrolytic...
Sodium‐ion batteries (SIBs) have been considered as one of the most promising secondary battery techniques for large‐scale energy storage applications. However, developing appropriate electrode materials that can satisfy the demands of long‐term cycling and high energy/power capabilities remains a challenge. Herein, a fluorine modulation strategy is reported that can trigger highly active exposed...
Cesium lead iodide (CsPbI3) perovskite has gained great attention due to its potential thermal stability and appropriate bandgap (≈1.73 eV) for tandem cells. However, the moisture‐induced thermodynamically unstable phase and large open‐circuit voltage (VOC) deficit and also the low efficiency seriously limit its further development. Herein, long chain phenylethylammonium (PEA) is utilized into CsPbI...
Metal anodes, such as zinc and bismuth have been regarded as ideal materials for aqueous batteries due to high gravimetrical capacity, high abundance, low toxicity, and intrinsic safety. However, their translation into practical applications are hindered by the low mass loading (≈1 mg cm−2) of active materials. Here, the multiscale integrated structural engineering of 3D scaffold and active material,...
Titanium‐based oxides including TiO2 and M‐Ti‐O compounds (M = Li, Nb, Na, etc.) family, exhibit advantageous structural dynamics (2D ion diffusion path, open and stable structure for ion accommodations) for practical applications in energy storage systems, such as lithium‐ion batteries, sodium‐ion batteries, and hybrid pseudocapacitors. Further, Ti‐based oxides show high operating voltage relative...
A safe, high‐capacity, and long‐life Li metal anode is highly desired due to recent developments in high‐energy‐density Li–metal batteries. However, there are still rigorous challenges associated with the undesirable formation of Li dendrites, lack of suitable host materials, and unstable chemical interfaces. Herein, a carbon nanofiber‐stabilized graphene aerogel film (G‐CNF film), inspired by constructional...
In article number 1801809, Liangti Qu and co‐workers establish large‐scale series‐connected asymmetrical micro‐supercapacitors (AMSCs) on a flexible substrate through laser direct writing technology. The integrated AMSC array with the high voltage output exhibits a feasibility for practical application by combination with energy conversion (e.g., solar cells) and energy consumption devices.
The micro‐supercapacitors are of great value for portable, flexible, and integrated electronic equipments. Here, the large‐scale and integrated asymmetrical micro‐supercapacitor (AMSC) array is fabricated in virtue of the laser direct writing and electrodeposition technology. The AMSC shows the ideal flexibility, high areal specific capacitance (21.8 mF cm−2), and good rate capability. Moreover, its...
Na metal anode attracts increasing attention as a promising candidate for Na metal batteries (NMBs) due to the high specific capacity and low potential. However, similar to issues faced with the use of Li metal anode, crucial problems for metallic Na anode remain, including serious moss‐like and dendritic Na growth, unstable solid electrolyte interphase formation, and large infinite volume changes...
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