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Novel porous nano-silicon/TiO2/rGO@carbon anodes with superior lifespan and desirable cycling stability are prepared by a step-wise synthetic procedure. The hybrid exhibits a high specific capacity of 1073.43 mAh g−1 at a current density of 500 mA g−1. Additionally, it delivers a reversible capacity of 724.08 mAh g−1 at 1000 mA g−1 even after 1000 long-term cycles. Simultaneously, a large average...
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...
In the present study, a hemp straw activated carbon (HSAC) was simply prepared by hydrothermal process followed by a pre-oxidization and carbonization by KOH solid-state activation. The as-synthesized HSAC shows abundant porosity, which is designed to be beneficial to the fast transportation of electrolyte. The preparation conditions for HSACs under different mass ratios of KOH:precursors were optimized,...
Biomass-based nanofibers were prepared by electrospinning a mixture of polyacrylonitrile and acid-treated biomass from industrial hemp straw. The as-prepared biomass-based nanofibers were then carbonized and activated by high-temperature carbonization and KOH to obtain the activated biomass-based carbon nanofibers. The scanning electron microscopy images show that the precursors and carbon nanofibers...
We have developed a novel material with a hybrid multiwalled carbon nanotube–graphitic platelet architecture for lithium ion battery (LIB) anode that requires no additional aggregate and support materials such as polymeric binders and current collectors of copper or aluminum foils. The absence of these inhomogeneous additives signifies a weight increase of the anode active materials, which contributes...
Submicron rod LiFePO4/C has been synthesized via a facile hydrothermal process. The morphology, crystal structure, and charge–discharge performance of the prepared samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and galvanostatic charge–discharge testing. The SEM and TEM illustrate that submicron rods with a width of...
In order to prevent the electrolyte decomposition of liquid state Al-plastic film lithium-ion batteries during overcharge, the redox reactions of 2-chloro-1,4-dimethoxybenzene and 4-fluoro-1,2-dimethoxy-benzene as possible electrolyte additives were characterized by using overcharge tests, galvanostatic charge–discharge techniques, linear sweep voltammetry tests, rate capability tests, and cycling...
The effects of SO2 and CO2 additives in electrolytes on the cycle properties of liquid-state Al-plastic film lithium-ion batteries were first investigated. The experimental electrolytes were added with different amounts of SO2 and CO2. The baseline electrolyte was 1 mol L−1 LiPF6 in ethylene carbonate/dimethylcarbonate/ethyl-methyl carbonate (1:1:1, by volume), and graphite was used as anode. The...
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