Facile Synthesis of LiMn0.75Fe0.25PO4/C Nanocomposite Cathode Materials of Lithium-Ion Batteries through Microwave Sintering

Abstract

LiMn 0.75 Fe 0.25 PO 4 /C nanocomposites are synthesized by a facile hydrothermal and ball-milling method, combining with spraydrying and microwave sintering process. X-ray diffractometer (XRD) and scanning electron microscopy (SEM) results reveal that the sintering process has a strong effect on the structures and morphologies of the as-prepared powders, and thus on the subsequent electrochemical performance. The lattice parameters (a, b, and c) of the microwave sintered sample are all smaller than those of the ordinary sintered sample. Meanwhile, compared to 299.66 Å 3 of unit cell volume for the ordinary heating sintered sample, the value of the microwave sintered sample is 299.15 Å 3 . Transmission electron microscope (TEM) displays that the grains of the microwave sintered sample are less than 50 nm. The microwave sintered sample presents an excellent electrochemical performance with a discharge capacity of 143.5 mAh g -1 and capacity retention of 94.3% after 225 cycles at a rate of 0.1 C. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) show that the microwave sintered electrode has a smaller charge-transfer resistance and a minor polarization and thus results in improved electrode kinetics. The microwave sintering is an economic, energy-saving, and time-saving synthetic method, which has great industrial application prospects.

Electrochemical Analysis of Architecturally Enhanced LiFe0.5Mn0.5PO4 Multiwalled Carbon Nanotube Composite

“…Reagents and materials were obtained from Sigma-Aldrich. e LiFe 0.5 Mn 0.5 PO 4 powder was synthesized with the complexing agent using a simple and facile microwaveassisted process [29], with minor modifications. e microwave sintering is an economic, energy-saving, and time-saving synthetic method, which has great industrial application prospects.…”

Technologies of lithium recycling from waste lithium ion batteries: a review

“…From the first commercialization in 1991, the lithium-ion battery has been a core energy technology and it has been continuously researched for several decades for the development of the future energy market. [1][2][3][4][5][6][7] Lithium is attracting attention as it is a key element of lithium-ion batteries. However, lithium is not evenly distributed around the world and is a limited element.…”

Aqueous flexible all-solid-state NiCo-Zn batteries with high capacity based on advanced ion-buffering reservoirs of NiCo2O4

“…Aqueous rechargeable NiCo-Zn batteries [1][2][3][4] have recently attracted increasing attention in portable electronics due to their intrinsic high safety, high voltage, and low cost in comparison with the features of supercapacitors [5][6][7][8][9][10][11], lithium ions batteries [12][13][14][15][16][17][18][19][20], Ni-Bi batteries [21][22][23], Ni-Fe batteries [24][25][26], and other devices in the energy storage field [27,28] for the environmental protection [29][30][31]. However, the low-temperature environment will restrict the application of aqueous electrolytes [32,33].…”