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A sulfur/graphene oxide/multiwalled carbon nanotube (S/GO/MWNT) composite was synthesized via a simple ultrasonic mixing method followed by heat treatment. By taking advantage of this solution-based self-assembly synthesis route, poisonous and noxious reagents and complicated fabrication processes are rendered unnecessary, thereby simplifying its manufacturing and decreasing the cost of the final...
A novel stacking sheet-like carbon (SSC) has been synthesized by carbonizing the corn stalks and composited with sulfur to prepare a cathode for lithium/sulfur batteries. Scanning electronic microscopy observations showed the formation of irregularly interlaced nanosheet-like structure consisting SSC with uniform sulfur coating on its surface. The SSC nanoflakes in the composite act as nanocurrent...
A sulfur/nitrogen-doped graphene (S/N-G) composite was synthesized by simple sonicated mixing of nanosized sulfur suspension and nitrogen-doped graphene suspension followed by heat treatment. Scanning electron microscopy and energy dispersive spectroscopy mapping showed the formation of a porous structure with uniform distribution of sulfur and nitrogen-doped graphene. Electrochemical performance...
A solid polymer electrolyte is fabricated using polyethylene oxide (PEO), lithium bis(Trifluromethanesulfonyl)imide (LiTFSI), and montmorillonite (MMT), with the aim of improving lithium ion conductivity, and the resulting solid polymer electrolyte is used for all solid-state lithium/sulfur batteries. The effect of temperature and nanoclay content on the conductivity of the resulting solid polymer...
We report on a simple and facile synthesis route for the sulfur/graphene oxide composite via ultrasonic mixing of the nano-sulfur and graphene oxide aqueous suspensions followed by a low-temperature heat treatment. High-resolution transmission and scanning electronic microscopy observations revealed the formation of a highly porous structure consisting of sulfur with uniform graphene oxide coating...
Ni foam and carbon fiber cloth were tested as three-dimensional (3D) current collectors for a sulfur/polypyrrole composite cathode in lithium batteries. The cell with the carbon fiber current collector has exhibited remarkably enhanced electrochemical performance compared with its Ni foam counterpart, delivering a high initial capacity of 1,278 mAh g−1 and maintaining a discharge capacity at 810 mAh g...
l-Lysine was employed as additive to prepare face-centered cubic spinel Li4Mn5O12. During the process, l-lysine played important roles such as complexing agent as well as combusting agent and adjusting the pH values of solution. The physical characteristics of Li4Mn5O12 were characterized by X-ray diffraction and scanning electron microscopy. The electrochemical capacitance performance of Li4Mn5O12...
The manganese oxide/multi-walled carbon nanotube (MnO2/MWNT) composite and the manganese oxide/acetylene black (MnO2/AB) composite were prepared by translating potassium permanganate into MnO2 which formed the above composite with residual carbon material using the redox deposition method and carbon as a reducer. The products were characterized by X-ray diffraction, Fourier transform infrared, and...
BaFeO4 was prepared by using the raw material K2FeO4. The structure of the product was characterized by X-ray diffraction and infrared radiation. Particle size and morphology were analyzed by SEM. BaFeO4, the mixture of BaFeO4, and additives were used as cathode, zinc used as anode, with which discharge performance test was carried out in the KOH electrolyte with a concentration of 14 mol/L. The results...
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