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Due to the high energy density and low cost, LiNi1/3Co1/3Mn1/3O2 is wildly explored as a promising cathode material for lithium-ion batteries. However, this material suffers from the destruction of surface structure in the electrolyte and the reacting of electrode with the electrolyte during cycles in highly voltage. Herein, we rationally designed core-shell nanostructure LiNi1/3Mn1/3Co1/3O2@ ultrathin...
LiAlCl4·3SO2 is a promising electrolyte used for Li metal batteries. At room and low temperature, a stable solid electrolyte interface film can be formed in LiAlCl4·3SO2 to achieve favorable protection for Li metal anodes. Here, Li|Cu cells with SO2-based inorganic electrolyte (LiAlCl4·3SO2) display higher average coulombic efficiency and more excellent cycling stability compared with a conventional...
A LiAlCl4·3SO2-NaAlCl4·2SO2 binary inorganic electrolyte was prepared by using NaAlCl4·2SO2 as the functional additive and mixing with LiAlCl4·3SO2. The obtained LiAlCl4·3SO2-NaAlCl4·2SO2 not only has good non-flammability but also exhibits improved electrochemical performance for Li-metal batteries. With the addition of NaAlCl4·2SO2, the fabricated Li/Cu cells using mixed inorganic electrolyte display...
Metal lithium anodes are quite promising for next-generation batteries due to their high energy density and low voltage, which has attracted numerous attention of the researchers. However, the main challenge for lithium anodes still lies on their serious dendrite problems, leading to the poor cycling stabilities. Here, we introduced poly(vinylidene-co-hexafluoropropylene) (PVDF-HFP) composite film...
An all-solid-state polymer electrolyte has been prepared by polymerizing a monomer ethoxylated trimethylolpropane triacrylate (ETPTA) using ultraviolet irradiation (UV-curing) into crystal electrolyte (referred to as UV-PCCE) in this paper, which has the merit of outstanding interfacial compatibility with electrode materials. Otherwise, on account of the appearance of a unique plastic-crystalline...
LiNi0.5Mn1.5O4(LNMO) material has high theoretical capacity and high operating voltage. Nonetheless, LNMO has still many problems which include oxidative decomposition of electrolyte at high voltage and dissolution of transition metals into electrolyte. In this work, oxides of both La and Al (LAO) were coated on the surface LNMO by a wet chemical method. LAO is estimated to improve cycling performance...
The performance of LiFePO4 (LFP)/graphite batteries would decline during floating-charge and cycling aging. The main aging factors are same for these two application modes. However, there are differences between the aging rates, aging factors on positive, and negative electrodes when batteries undergone floating-charge and cycling mode. In this work, LFP/graphite batteries were assembled and tested...
Red phosphorus (RP) is considered to be one of the promising anode materials for lithium-ion batteries (LIBs) on account of its high theoretical capacity (2596 mAh g−1), abundant resources, and environmental friendliness. However, the intrinsic insulating nature and large volume change during lithium insertion/extraction process lead to drastic capacity loss upon cycling. Recently, great attention...
Samples LixNi0.5Mn1.5O4 (x = 0.8, 0.9, 1.0, 1.1, and 1.2) are synthesized to study the effects of Li contents. When Li contents are not enough, part of the nickel-manganese oxides cannot transfer to LiNi0.5Mn1.5O4 and remain in the product. When Li contents are too much, small amount of lithium-rich oxide is formed. In voltage window of 3.5~4.95 V, Li1.0Ni0.5Mn1.5O4 has the best rate performance due...
N-doped graphene/Bi nanocomposite was prepared via a two-step method, combining the gas/liquid interface reaction with the rapid heat treatment method. The as-prepared sample was characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), X-ray photoelectron spectroscopy (XPS), and elemental analyzer. The XRD, FESEM, XPS, and elemental analysis results confirm the...
Mn1.5Co1.5O4 hierarchical microspheres have been successfully synthesized via a solvothermal method and an annealing procedure. Mn1.5Co1.5O4 exhibits advanced cycling performance, and it retains a reversible capacity of 633 mA h g−1 at a current density of 400 mA g−1 with a coulombic efficiency of 99.0% after 220 cycles. Its remarkable performance is attributed to the hierarchical structure assembled...
Using chemical vapor deposition methods to prepare carbon nanotubes growing in situ on a carbon felt, graphene and polyaniline were applied to the carbon felt for modifying carbon nanotubes. Microbial fuel cell was constructed with graphene/polyaniline-modified carbon nanotubes as anode, graphite as cathode, and glucose solution as substrate. The effects of electrodes, substrate concentration, and...
The high-voltage spinel LiNi0.5Mn1.5O4 (LNMO) with submicron particle size (LNMO-8505P70010) has been synthesized based on nickel-manganese compound, which is obtained from pre-sintering the nickel-manganese hydroxide precipitation at 850 °C. The LNMO materials based on nickel-manganese hydroxide (LNMO-70010, LNMO-850570010, and LNMO-8501070010) have also been synthesized for comparison to study the...
A pyridine-based task-specific ionic liquid (TSIL) designed to extract uranyl ion (U (VI)) from nitric acid medium was synthesized through the introduction of tributyl phosphate functional group in cationic of the ionic liquid. Its structure was confirmed by Fourier transform infrared spectrometer, nuclear magnetic resonance spectrum, and element analysis. The TSIL can be used simultaneously as solvents...
The effects of Cr3+ doping and citric acid combustion on the electrochemical properties of Li4Ti5O12 were systematically investigated. The solid-state reaction process was used to synthesize four samples marked as LTO, C-LTO, LT-Cr-O, and C-LT-Cr-O, respectively. X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) techniques were employed to study their structures and morphologies...
Mg-7.5Li-3.5Al and Mg-7.5Li-3.5Al-1Y alloys are prepared, and their electrochemical performances are investigated by potentiodynamic polarization, potentiostatic current-time curves, electrochemical impedance spectroscopy, scanning electron microscopy (SEM), varying load performances, and utilization efficiencies. The performances of the Mg-H2O2 semi-fuel cells with the above alloy anodes are also...
LiFePO4/C active materials were synthesized via a modified carbothermal method, with a low raw material cost and comparatively simple synthesis process. Rheological phase technology was introduced to synthesize the precursor, which effectively decreased the calcination temperature and time. The LiFePO4/C composite synthesized at 700 °C for 12 h exhibited an optimal performance, with a specific capacity...
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