[PDF] Top 20 Hydrothermal Synthesis and Electrochemical Performance of Al-doped VO2(B) as Cathode Materials for Lithium-Ion Battery

... the electrochemical impedance spectroscopy (EIS) and the cyclic voltammetry (CV) were tested through a CHI 760D electrochemical workstation, and the CV measurement was performed in the potential range from ... See full document

... to (Figure 4.17(c)), the results reveal that the mechanical stresses are dislocation direction and location dependent, suggesting that the greater distance between two dislocations, the lower mechanical stresses are ... See full document

... samples at the current density of 0.1 C. All of them show a distinct charge platform at about 2.7 V and a distinct discharge platform at about 2.5V, which are agreement with that of the reference [7, 34, 35]. The results ... See full document

... using Al Kα (1486.6eV) X-ray source. The EIS and CV of the cathode materials were texted using electrochemical workstations (CHI860D) by Beijing Huakeputian ... See full document

... the lithium storage ...the lithium insertion and deinsertion due to short diffusion length for lithium-ion transport within the ...cyclic performance although holding a smaller particle ... See full document

... onto Al foil ,then pressed at 10MPa and dried at 120°C for 10h in a vacuum ...using lithium metal as the counter electrode, Celgard 2325 as the separator, and 1 M LiPF6 in 1:1 EC:DEC solution as the ... See full document

... 0.3 lithium ions per formula unit, reflecting the relatively poor electronic conductivity of the ...the cathode, achieved by mechanical milling which also results in a reduction of the crystallite size, ... See full document

... the battery includes two parts during charge-discharge process: reversible (reaction heat) and irreversible heat (polarization heat, Joule heat) ...of battery is little at low charge discharge rate and ... See full document

... Fig. 2 shows the SEM micrographs of the samples. The observed morphology is almost similar among the three samples, and consists of nano-sized grains that aggregate in larger particles, whose dimension is dependent of ... See full document

... anode materials, conductive agent (i.e., Super P, 15 wt.%) and PVDF (10 wt.%), and then, a suitable amount of solvent (i.e., N-methyl pyrrolidone (NMP)) was added for size mixing. Then, the cathodes were evenly ... See full document

... an increase in the diffusion capacity of Li + . In addition, the doping material discharge capacity is less than the charge capacity, which demonstrates that the Li + interval and separation are incomplete during ... See full document

... Generally, synthesis plays very important role on the purity, crystallization, size distribution and finally the electrochemical performance of the ...method[22], ion exchange method[23] and ... See full document

... 5 wt% polyvinylidene fluoride- PVDF (Kureha) as the binder. The composite electrode slurry was coated onto aluminum foil (Nippon foil) and dried for 5 min at 110–130 o C in air, followed by 6 h in a vacuum oven at 90 o ... See full document

... promising cathode for lithium ion battery using in the field of electric vehicle and energy ...a synthesis leading directly to carbon coated particles ... See full document

... entire performance of the materials by the reason of the synergetic effect [21, ...Carbon materials binary doping with sulfur and nitrogen have been applied into oxygen reduction reaction (ORR) [23], ... See full document

... The Lithium coin cells were assembled using the as-prepared cathode, a lithium metal foil as counter electrode and a porous polypropylene film (Celgard 2400) as a ...EC/DMC. Lithium coin cells ... See full document

... The electrochemical tests showed that the discharge specific capacity and cycle performance of the samples could be significantly improved after doping Al 3+ ...of Al/V was ...enhanced ... See full document

... when doped with trace amounts of Fe (x = ...these materials is research by means of scanning electron microscope, as shown in Figure 2, show that the material is consist of small particles have no obvious ... See full document

... The voltage range is 2.0~4.2 V and the scanning speed is 0.1 mV/s. It can be seen from the figure that a pair of redox peaks appear in the cycle corresponding to the redox reactions of Fe 3+ /Fe 2+ and Li + /Li, ... See full document

... active materials, carbon black, and PVDF (in a weight ratio of ...the Al foil with a blade. The slurry-coated Al foil was dried at 120 °C in a vacuum oven overnight, followed by punching into ... See full document