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The authors regret to have uploaded the wrong Fig. 8 of this manuscript during the submission of the revised manuscript. The correct Fig. 8 is included here.
A series of layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials, of which manganese source was electrolytic manganese dioxide, with different contents of SO42− were successfully synthesized via ball-milling process and solid-state sintering method. The obtained materials were characterized by XRD, XPS, SEM-EDS, C-S, ICP, and HR-TEM. All the obtained materials presented well-ordered layered structure...
Mg-doped Li[Li0.2Mn0.54 − x/3Ni0.13 − x/3Co0.13 − x/3Mgx]O2 (x = 0, 0.005, 0.007, 0.01, and 0.02) cathode materials have been synthesized by mixing Mn0.54Ni0.13Co0.13(CO3)0.8 precursor, Li2CO3, and MgO, followed by high-temperature solid-state method. X-ray diffraction (XRD) results show that Mg-doped samples have enlarged interlayer distance and orderly layered structure. Scanning electron microscope...
To suppress the capacity fade of Li-rich Li1.2Ni0.13Co0.13Mn0.54O2 material as cathode materials for lithium-ion battery, we introduce a LiF coating layer on the surface to improve the cycling performance of Li1.2Ni0.13Co0.13Mn0.54O2 material. The modified sample shows a capacity of 163.2 mAh g−1 with a capacity retention of 95% after 100 cycles at a current density of 250 mA g−1, while the pristine...
Compact-structured silicon/carbon composites consisting of silicon, graphite, and coal tar pitch pyrolysis carbon are prepared via two heating procedures after liquid solidification. The first heating procedure plays a key role in the formation of compact-structured silicon/carbon composites, in which the coal tar pitch has a good fluidity at 180 °C above the softening temperature, and it is easy...
Mg-doped lithium-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 with smooth morphology is synthesized by co-precipitation followed by calcination. The morphologies of bare particles and electrodes have been studied through scanning electron microscopy (SEM), which illustrates that, compared with the Mg-doped particles, the pristine particles are characteristic of angular and corrosion is much more likely...
Silicon/graphite/carbon (Si/G/CTS-C) composite, based on nano-silicon, flake graphite, and chitosan-derived carbon (CTS-C), was prepared by spray drying and subsequent pyrolysis. The results of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy illustrate that chitosan is a good dispersion agent and chitosan-derived carbon is N-doped...
The anode material Si/CNTs@C composite is prepared by a spray–drying combined pyrolysis technology. The as–prepared material is characterized by XRD, SEM, TEM, and electrochemical measurements. The composite is composed of nano–Si, CNTs, flake graphite, and amorphous glucose–pyrolyzed carbon, and CNTs provides a good wrapping effect to buffer the volume change of silicon. The composite as anode for...
LiCoO2 sample prepared by high-temperature solid state calcination shows a typical hexagonal structure with a single phase and fine particle size distribution. The high-voltage electrolyte with additive fluoroethylene carbonate (FEC) has been used. Electrochemical results show that the initial discharge capacities of the prepared LiCoO2 cathode are 157.7, 169.5, 191.0, and 217.5 mAh g−1 in the voltage...
Novel poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP))-based composite polymer electrolyte (CPE) membranes doped with different contents of nano-SiO2 using urea as a pore-forming agent were prepared by phase inversion method, and the desired CPEs were obtained by being immersed into 1.0 M LiPF6-EC/DMC/EMC electrolytes for 0.5 h. The physicochemical properties of the CPEs were characterized...
The cycling performances of LiNi0.5Mn1.5O4 (LNMO) were investigated and the reasons of capacity fading were discussed. The results show that LNMO can deliver about 115 mAh g−1 at 1C at different temperatures; however, it retains only 61.57 % of its initial capacity after 130th cycles at 60 °C, which is much lower than 94.46 % of LNMO at 25 °C, and the cycling performance at 1C is better than that...
Li-rich Mn-based Li[Li0.09Mn0.65*(0.91 − x) Ni0.35*(0.91 − x) Alx]O2 cathode materials have been prepared by traditional solid-state reaction. The lattice parameters a, c, and V have decreased, but c/a increased with the increase of Al doping. All the samples show analogy morphology of a quasi-spherical shape. Li[Li0.09Mn0.591Ni0.319]O2 sample shows a higher initial discharge...
The use of graphene as a conductive additive to enhance the rate capability and cycle stability of Li4Ti5O12 electrode material has been demonstrated. Li4Ti5O12 and its composite with graphene (1.86 wt%) are prepared by ball milling and simple chemical method, respectively. Among the as-synthesized composites, Li4Ti5O12 particles uniformly clung to the graphene sheets. When used as an electrode material...
A LiNi0.6Co0.2Mn0.2O2/reduced graphene oxide (RGO) composite with RGO content of 1.2 % was prepared by a simple spray-drying method instead of high-energy ball milling method. The composite has been characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, energy dispersive spectroscopy, and charge/discharge test. The X-ray diffractometry result showed that...
In order to investigate the effect of different electrolytes of LiPF6-based and LiPF6-based with the mixed additives of ethanolamine and heptamethyldisilazane on the storage performance of LiMn2O4, the commercial LiMn2O4 are added into these different electrolytes for storing deliberately at 60 °C in air for 4 h. The results show that the electrolyte with additives can prevent LiMn2O4 from being eroded...
The power battery was manufactured with the commercial LiMn2O4 and graphite, and its storage performances with different charged state were studied. Structure, morphology, and surface-state change of the LiMn2O4 before and after storage were observed by XRD, SEM, XPS, CV, and AC technique, respectively. The electrochemical performances of LiMn2O4 battery were tested. The result shows that the capacity...
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