[PDF] Top 20 CePO4 Coated LiNi0.6Co0.2Mn0.2O2 as Cathode Material and its Electrochemical Performance

... The sample was analyzed by the X' pert 3 power X-ray diffractometer from the Dutch. The CuKα (λ = 0.15405 nm) source was used, the accelerating voltage was 40 kV, the tube current was 100 mA, and the scanning angle range ... See full document

... Clearly, the LiMn2O4/graphene sample can suppress the charge transfer resistance, which is contributed to a higher discharge capacity and high rate capability compared to the pristine Li[r] ... See full document

... capacity about 330 mA·g -1 at 0.1C. Original discharge capacity reduce significantly at higher current density, which discharge capacity at 1C is 113 mA·g -1 , the level is only 40%. In comparision with the pristine ... See full document

... ) with a scan rate of 0.05 mVs -1 . Electrochemical impedance spectroscopy (EIS) was tested in the frequency range from 0.1 Hz to 100 KHz with an AC signal amplitude of 10 mV using the IM6ex electrochemical ... See full document

... photoelectron spectroscopy (XPS). It is well known that the electrochemical properties of the sample is related with their sizes and phases as well as their chemical binding states. The XPS survey spectra in ... See full document

... low degree of cation mixing. As the result, the hydrothermally-assisted co-precipitation method can save almost half the time of precursor reaction and calcination compared with reported co-precipitation methods. At the ... See full document

... sample were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and electrochemical tests. The results of XRD and XPS show that Al 3+ and Fe 2+ are ... See full document

... lithium foil was used as anode. A thin sheet of microporous polypropylene insulated the positive electrode from negative electrodes. Battery assembly was carried out in an argon-filled glove box. Cyclic voltammetry (CV) ... See full document

... of cathode materials are also called Li-rich layered ...of cathode material has many attracting advantages, it has a poor rate performance and is subject to voltage decay after long ...one ... See full document

... As shown in Fig. 5 (a), there are two main electrochemically active regions observed: at ~4.0 V and at ~4.7 V, which was corresponding to the Mn 4+ /Mn 3+ and the Ni 4+ /Ni 2+ redox couples, respectively [21-23]. The Ni ... See full document

... In recent years, the demand for power batteries with higher energy and power capability becomes urgent as the decrease of worldwide energy. Lithium ion batteries are considered as the promising candidate for the future ... See full document

... doped cathode materials can indicate bigger discharged capacities, better cycling stability and rate performance compared with the pristine cathode material according to the results of kinds ... See full document

... The electrochemical impedance spectra (EIS) were measured on an electrochemical workstation (CHI660E, Shanghai Chenhua ...same electrochemical workstation (CHI660E, Shanghai Chenhua ... See full document

... dissolved in 200 mL water by stirring for 60 min. separately, citrate iron (III) (Merck, S3657400 219 was dissolved in 300 mL of water by stirring for 60 min. This two solutions were mixed together and obtained a ... See full document

... an ethylene carbonate (EC), propylene carbonate (PC), and ethylene methyl carbonate (EMC) mixture (EC:P- C:EMC = 1:2:7, v:v:v). Galvanostatic charge-discharge measurements were carried out at 25 °C and 55 °C at a voltage ... See full document

... Fig. 3(b) shows the cycling behaviors of the Li-rich NCM composite electrodes at various discharge C-rates within the cutoff voltage limits between 2.0 V and 4.8 V at room temperature. Although all curves in this Fig. ... See full document

... Electrode laminates were made by casting a slurry of 80 wt % active oxide, 10 wt % acetylene black and 10 wt % polyvinylidene fluoride (PVDF) in 1-methy-1-pyrrolidinone solvent onto an Al foil. The cast laminates were ... See full document

... the electrochemical performance of the material, all samples were tested for AC impedance in the uncharged cycle, as shown in ...the material and the electrolyte interface, while the oblique ... See full document

... the performance of lithium sulfur ...sulfur cathode materials on lithium sulfur batteries, and the influence on sulfur electrochemical performance of C/S composite material, C-S-TiO 2 ... See full document

... the cathode materials of the lithium-rich solid solution include phase mixtures [8, 9], surface modifications [10-12] and improved synthetic methods [13, ...the electrochemical performance of ... See full document