Synthesis of LiCoPO4/C nanocomposite fiber mats as free-standing cathode materials for lithium-ion batteries with improved electrochemical properties

Synthesis of Free‐Standing CoxP/Co3(PO4)2/C Composite Nanofiber Mats and Their Characteristics as Multi‐functional Interlayers for Lithium‐Sulfur Batteries

“…As seen from the pattern of the PO‐280‐AN‐700‐N 2 sample, the same and only bump is present after annealing in the N 2 atmosphere. According to our previous study, pre‐oxidized PVP‐coated cobalt phosphates (e. g., LiCoPO 4 ) withstand up to 700 °C when annealed in a pure N 2 atmosphere but significantly reduce to cobalt phosphide in the presence of H 2 [33] …”

“…According to our previous study, pre-oxidized PVP-coated cobalt phosphates (e. g., LiCoPO 4 ) withstand up to 700 °C when annealed in a pure N 2 atmosphere but significantly reduce to cobalt phosphide in the presence of H 2 . [33] Figure 1. XRD patterns (a) and P 2p XPS spectra (b) of the samples prepared under different synthesis conditions, where PO: pre-oxidation and AN: annealing.…”

Preparation of a Ni3Sn2 alloy-type anode embedded in carbon nanofibers by electrospinning for lithium-ion batteries

“… 22 Furthermore, the prepared fibrous structure allows further improvement of the electrochemical properties of the electrode by shortening the Li + diffusion pathway during the charge–discharge processes. 23 For instance, Zhan et al prepared free-standing and binder-free anode (FeP 2 @carbon nanofibers) using the electrospinning method. 24 Authors could confine the well-dispersed FeP 2 nanoparticles and amorphous phosphorus in the carbon nanofiber skeleton.…”

Molecular Design of Asymmetric Cyclophosphamide as Electrolyte Additive for High-Voltage Lithium-Ion Batteries

“…With the continuously growing market for electric vehicles and portable electronics, it is urgent to develop lithium-ion batteries (LIBs) with higher energy density, which can be realized by increasing the cell voltage and/or the cell capacity according to the energy density calculation. − In recent years, tremendous efforts have been dedicated to exploring high-voltage/capacity cathode materials, such as LiCoPO 4 , , LiNi 0.5 Mn 1.5 O 4 , , and LiNi x Mn y Co z O 2 (NMC, x + y + z = 1) layered oxides. − For instance, LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC111) has a theoretical capacity of 287 mAh g –1 , with its capacity proportional to the charging voltage. , Therefore, elevating the upper cutoff voltage is a straightforward approach to increase the cell capacity and energy. Nevertheless, the NMC cathodes generally suffer from structural and thermal instabilities under high cutoff voltage (≥4.4 V) which thus significantly degrades the cell life. , On the other hand, the electrolyte is of vital importance for promoting the reversible redox reaction of the electrodes; , it is composed of 1 M lithium hexafluoro­phosphate (LiPF 6 ) dissolved in the mixed solvent of ethylene carbonate (EC) and a linear carbonate such as dimethyl carbonate (DMC) or diethyl carbonate (DEC).…”

“…W ith the continuously growing market for electric vehicles and portable electronics, it is urgent to develop lithium-ion batteries (LIBs) with higher energy density, which can be realized by increasing the cell voltage and/or the cell capacity according to the energy density calculation. 1−4 In recent years, tremendous efforts have been dedicated to exploring high-voltage/capacity cathode materials, such as LiCoPO 4 , 5,6 LiNi 0.5 Mn 1.5 O 4 , 7,8 and Li-Ni x Mn y Co z O 2 (NMC, x + y + z = 1) layered oxides. 9−11 For instance, LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC111) has a theoretical capacity of 287 mAh g −1 , with its capacity proportional to the charging voltage.…”