Abstract Energy‐storage technology is moving beyond lithium batteries to sodium as a result of its high abundance and low cost. However, this sensible transition requires the discovery high‐rate long‐lifespan anode materials, which remains significant challenge. Here, facile synthesis an amorphous Sn 2 P O 7 /reduced graphene oxide nanocomposite storage performance between 0.01 3.0 V are reported for first time. This hybrid electrode delivers specific capacity 480 mA h g −1 at current...

Polyanionic Na3V2(PO4)2F3 with a NASICON-type structure is heralded as promising cathode material for sodium-ion batteries due to its fast ionic conduction, high working voltage, and favorable structural stability. However, number of challenging issues remain regarding rate capability cycle life, which must be addressed enable greater application compatibility. Here, facile effective approach that can used overcome these disadvantages by introducing an aqueous carboxymethyl cellulose (CMC)...

High-entropy materials are an emerging kind of solid-solution material, demonstrating various exotic physicochemical properties, that have led to increased research activity as electrode for rechargeable batteries. Here, a high-entropy spinel oxide, (Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)3O4 (CCFMNO), was successfully fabricated via solution combustion method. Due the entropy stabilization effect and intrinsic high mechanical strength CCFMNO, excellent cycling stability can be achieved. In addition,...

Abstract Transition metal sulfides (TMSs) are reported to be efficient sodium storage anode materials due their rich redox chemistry and good electronic conductivity features. However, the issues of poor reaction reversibility cyclability, caused by structure degradation volume expansion during repeated (de)sodiation processes, have far limited applicability these materials. Herein, a high‐entropy configuration strategy is for Cu 4 MnFeSnGeS 8 anodes advanced ion batteries. In this material,...

Abstract High entropy materials have garnered considerable attention recently as a class of with intricate stoichiometry, exhibiting high levels entropy. These hold great promise candidates for electrochemical energy storage devices due to their ideal regulation, good mechanical and physical properties attractive synergy effects multi‐elements. In this perspective, we provide an overview used anodes, cathodes, electrolytes in rechargeable batteries, insight into the materials’...

FTIR spectroscopy in combination with scaling-MW2D and 2D correlation analysis is used to study the reaction pathways of polyacrylonitrile copolymer fibers pre-oxidation.

This study developed a simple way to achieve legible and local controllable patterning for polymers based on near-infrared (NIR) pulsed laser. The polycarbonate-coated nano antimony-doped tin oxide (nano ATO) was designed as core–shell structure that tailored be responsive 1064 nm NIR globular morphology of ATO with diameter around 2–3 μm observed by scanning electron microscopy transmission microscopy. combined the excellent photothermal conversion efficiency high char (carbon) residue...

Excited state intramolecular proton transfer (ESIPT) within molecules in solvents plays important roles photo-chemistry and photo-biology. Herein, the influence of 1-ethyl-3-methyl-imidazolium bis (trifluoromethylsulfonyl) imide ([EMIm][NTf2]) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIm][PF6]) on ESIPT 4′-N,N-diethylamino-3-hydroxyflavone (DEAHF) was explored. The density functional theory time-dependent methodologies were used. calculated fluorescence spectrum reveals that peaks...

A facile chemical vapor deposition method is developed for the preparation of carbon nanofiber (CNF) composite Na3 V2 (PO4 )2 F3 @C as cathodes sodium-ion batteries. In all materials under investigation, optimized content, denoted NVPF@C@CNF-5, shows excellent sodium storage performance (86.3 % capacity retention over 5000 cycles at 20 C rate) and high rate capability (84.3 mA h g-1 50 C). The superior benefits from enhanced electrical conductivity working electrode after formation a with...

Open AccessCCS ChemistryRESEARCH ARTICLE1 Sep 2021Hybrid and Aqueous Li+–Ni Metal Batteries Jing Zhao†, Xu Yang†, Shuyue Li, Nan Chen, Chunzhong Wang, Yi Zeng Fei Du Zhao† College of Materials Science Engineering, Key Laboratory Automobile Materials, Ministry Education, Jilin University, Changchun 130012 Physics Technology for Advanced Physics, , Yang† Science, Shenyang Aerospace 110000 Li Chen Wang *Corresponding authors: E-mail Address: [email protected]...

Abstract Excellent current-carrying tribological properties including the low-friction, high anti-wear, efficiency, and stability are important for application in transmitting electrical signals power. Here, Cu/graphene composites with graphene uniformly distributed Cu matrix were successfully prepared by combining electroless plating process powder metallurgy process. The friction, wear, of brass pairs investigated varying normal applied load sliding speed under multiple voltages. friction...

Electronic and ionic conductive network accelerate transfer of Na⁺ among particles thus enabling cathode to show remarkable rate capability.

The NOx produced from industrial facilities is a serious environmental problem in China. In this work, the emission combustion of natural gas sidewall burner was investigated by using CFD method. To achieve low emission, structure optimized involving width primary premixed outlet, secondary fuel nozzles number and angular spacing. mixing rate air could be improved increasing lowest 32.8 ppm achieved at 8 mm. remarkably reduced with number, where 28.33 357.35 CO were obtained four nozzles....

Traditionally, analyzing the load-bearing characteristics of complex structural components pays more attention to static factors ignoring dynamic factors. Static elements focus on distribution stress while element flowing tendency various loads in different directions. Load path is a new expression and this paper take engine's cylinder head as study object analyze using load theory. In order simplify problem, slices first are researched conclusions drawn prove effectiveness

Quantum-based sensing and measurement technology is a disruptive that can realize fine detection of the gravity magnetic fields in deep Earth, it has become key development direction for geophysical exploration equipment worldwide. This study focuses on frontier technologies quantum-based high-precision Earth's fields, summarizes status equipment, analyzes demand superconducting electromagnetic system, vector gradient cold-atom absolute-gravity system during resource exploration. Moreover,...

To summarize and analyze the diagnostic therapeutic characteristics of asymptomatic primary hyperparathyroidism (aPHPT).

Eight-segment LED displays were designed and fabricated using quantum dot light-emitting diodes. CdSe/CdS/ZnS core/shell employed as the emitting layer sandwiched by poly(N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine) (Poly-TPD) an electron transport of ZnO nanoparticles. Each segment exhibited luminance, power efficiency external 5380 cd/cm2, 2.63 lm/W 1.2%, respectively. The uniformity eight segments was analyzed based on current-density luminance versus driving voltage. good indicates...

Abstract For the Microencapsulated Phase Change Materials slurry(MPCMs)having a large latent heat during phase change period and having higher convection coefficient than single-phase fluid, it has become new thermal fluid of widespread investigation. In this paper, model equivalent specific is presented to numerical simulate laminar convective transfer performances MPCMs in tube under condition constant flux. The investigated various concentrations flux correlation with obtained.

Application of data mining in mobile communication enterprises can help the conduct customers subdivision, understand characteristics consumer behavior and develop appropriate product service systems based on different subdivided groups to occupy more market shares provide better services for customers. By applying cluster analysis method using k-means algorithm, this paper analyzes collected consumption with college students as samples, concludes behavioral three type makes proposals from...

Abstract Group recommendation aims to suggest desired items for a group of users. Existing methods can achieve inspiring results in predicting the preferences data-rich groups. However, they could be ineffective supporting cold-start groups due their sparsity interactions, which prevents model from understanding intent. Although alleviated by meta-learning, we cannot apply it using same initialization all varying preferences. To tackle this problem, paper proposes memory-augmented...

Ice Storage air-condition can be used to shift electrical load from on-peak hours off-peak hours, which bring mutual benefits power supplier and consumers. An unsteady heat transfer numerical model is developed predict the increment of thickness ice layer flake storage system with Cu-H2O nanofluids solidification. In this study, speed water are compared.