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A novel type of porous nitrogen-doped carbon networks derived from a green biomass-waste (orange peel) by integrated carbonization, activation, and nitrogen-doped processes using FeCl3 as activating agent and urea as nitrogen precursor and gasification expander. The porous nitrogen-doped orange peel-based carbon networks (PN-OPC) possessed interconnected porous carbon networks morphology, high specific...
Sodium metal chloride batteries possessing many merits, such as high energy density and long cycle life, are usually operated above 300 °C. Such high operating temperature may accelerate corrosion and aging, increase operating complexity, require an extra thermal management system, and limit their widespread applications. Lowering the working temperature may alleviate these issues and broaden their...
In this study, we synthesized nitrogen-doped Mo2C@carbon nanotube (N-Mo2C@CNT) composites via a facile one-pot method of solvothermal followed by calcination. The SEM and TEM results of N-Mo2C@CNT composites show that the sphere-shaped N-Mo2C is covered by CNTs. In addition, the electrocatalytic performances of the as-obtained N-Mo2C@CNT composites were examined towards the hydrogen evolution reaction...
Rechargeable aluminum batteries are promising large-scale energy storage candidates due to the high natural earth abundance and high theoretical volumetric capacity of Al metal. However, they face many problems, including a limited lifetime, rate performance, and high electrolyte cost. Herein, we have designed a high-performance Al rechargeable battery using a graphite cathode and an economical AlCl...
The inherent disadvantages of untreated carbon felt (pristine-CF) still restrict the vanadium redox flow battery (VRFB) from further improving in electrochemical performances. To solve this problem, the carbon felt (CF) decorated with bismuth hydrogen edetate (Bi(HEDTA)) complex was synthesized and studied as anode for VRFB. The cyclic voltammetry curve reflects the great improvement in electrochemical...
Nitrogen and oxygen co-doped glucose-based porous carbon materials were successfully synthesized using ethylenediamine as nitrogen source through hydrothermal treatment and KOH activation. The activation has an obvious impact on the porosity and porous structure, which leads to remarkable increasement in the specific surface area from 99.63 to 1105.58 m2 g−1 and high nitrogen content of 1.727% and...
This paper presents the results of an experimental study aimed at preparing high-conductivity solid electrolytes for Al-air primary cells, starting from an eco-friendly polysaccharide (xanthan) and KOH or HCl concentrated solutions (up to 11 M). Xanthan permits all-solid-state Al-air cells to be prepared with both KOH and HCl solutions but, differently from the already acquired knowledge, the best...
In this article, highly Na+ ion conducting glass samples based on Na3+x[CrxTi2-x(PO4)3] (x = 0, 0.25, 0.5, and 0.75 mol%) (NCTPx) system was prepared via melt quenching technique. The as-formed precursor glasses were transformed into glass-ceramics by heat treating at and above Tc for different time schedules. Powder XRD indicates the formation of NASICON type phase (Na3Ti2(PO4)3) which is known for...
Carbon-based materials have always been a hot issue of research as important electrode materials for supercapacitors. Their capacitance characteristics depend on specific surface area, pore size distribution, and chemical composition etc. In this report, we utilize sodium citrate as a carbon source and melamine and urea as nitrogen sources. We prepared two types of nitrogen-doped hierarchical porous...
Herein, we report a facile and low-cost synthesis of nitrogen and phosphorus co-doped carbonized bacterial cellulose (N, P-CBC) via in-situ soaking bacteria cellulose and carbonization method. The N, P-CBC yielded a high specific capacitance of 232 F g−1 at 1 A g−1 and 92.7% rate capability retention at 5 A g−1. Moreover, the asymmetric supercapacitor (ASC) device was further fabricated with N, P-CBC...
Novel hierarchical MoS2@TiNb2O7 (MS@TNO) hetero-nanostructures consisted of TiNb2O7 nanorods and ultrathin MoS2 nanosheets were successfully synthesized by simple sol-gel/hydrothermal processes. The synergistic effects of the two constituents benefited to the lithium-ion transport kinetics of the MS@TNO hetero-nanostructure for lithium-ion batteries (LIBs). In the potential range of 0.01~3.00 V vs...
Surface modified with nano-ZnO LNCM power has been successfully prepared using facile low-temperature solid-state route. The experimental results show that the reaction temperature has a great influence on the structure of coating layer. ZnO@LNCM-400 shows the best electrochemical performance, which has lesser capacity loss than the others. It shows superior performance with higher capacity (216.6 mAh g...
Organic polymers have the potential to be electrode materials for lithium–ion batteries due to their lower solubility, lower self-discharge rates, high mechanical strength, greater flexibility, superior thermal stability, and versatility. In this paper, the density functional theory (DFT) was applied to investigate industrial polymers as electrode materials for lithium–ion batteries. The charge/discharge...
A highly stable and more water-dispersible graphene (WDG) was synthesized using microwave-assisted ball milling technique. The WDG-wrapped MnO2 nanocomposites were prepared for two mass ratios of nanospheres and graphene sheets using reflux method. Comprehensive characterization of the prepared WDG-Mn1 and WDG-Mn2 hybrid nanocomposites was carried out to explore the electrochemical capacitance behaviors...
A simple, novel electrochemical sensing platform based on porous g-C3N4 (PCN) and multi-walled carbon nanotubes (MWCNTs) for the sensitive detection of uric acid (UA) has been proposed. The obtained PCN possessed good biocompatibility and large specific surface area with good dispersion, which was beneficial to electrocatalysis. The introduction of MWCNT as the conducting matrix improved the poor...
Recently, metal molybdates have drawn significant attention due to their excellent electrochemical properties and remarkable performances in various fields, especially for supercapacitors. The rod-like α-MnMoO4 crystallites were designed and synthesized via a microwave-assisted hydrothermal process followed by annealing and used as electrode materials for supercapacitors. The effects of different...
In this study, manganese recycled from cathodes of spent Zn–MnO2 batteries was used for the sol–gel synthesis of a manganese oxide pseudocapacitor with high specific capacitance. The recycled material is a mixture of α-MnO2, Mn3O4, and ZnMn2O4, according to X-ray diffraction, energy dispersive X-ray, Raman spectra, and chemical analysis. Manganese oxide has smaller particle size when synthesized at...
The combination of high-capacity and long-term cyclability has always been regarded as the first priority for next-generation anode material for lithium-ion batteries (LIBs). To meet these requirements, in this work, the Ag-decorated pomegranate seed-like Fe3O4 anode was synthesized through a facile one-pot solvothermal method, without intervening of inert gas or any additional surfactants. The Ag...
Reasonable design of the cathode host material can effectively improve the electrochemical performance of lithium–sulfur batteries. In this work, a metal-organic framework (MOF)–based strategy was used to synthesize nanocomposites containing carbon nanotubes and nickel-cobalt mixed metal oxide (denoted as Ni–Co oxide/CNTs). The Ni–Co oxide/CNTs/S cathode exhibits excellent electrochemical performance,...
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