Microsized fayalite Fe2SiO4 as anode material: the structure, electrochemical properties and working mechanism

Abstract

Microsized fayalite Fe2SiO4 as anode material: the structure, electrochemical properties and working mechanism. Journal of Electroceramics.

The Influence of a Binder in a Composite Electrode: The Case Study of Vanadyl Phosphate in Aqueous Electrolyte

“…This new pattern entirely matches the pattern of the H x VOPO 4 •2.33H 2 O phase, which has a partly reduced vanadium and whose structure can be described in the P2 1 /c monoclinic space group [35]. The lattice parameters of the new monoclinic phase are obtained by Le Bail fit [36,37] and amount to a = 7.4, b = 26.4, and c = 8.8 Å with an angle β = 106.6 • . They are related to the lattice parameters of the pristine tetragonal phase by the equations b m = √ 2•3a t and c m = √ 2a t (where t and m refer to the tetragonal and monoclinic phases, respectively).…”

Boosting Conversion of the Si–O Bond by Introducing Fe2+ in Carbon-Coated SiOx for Superior Lithium Storage

“…The deterioration in both capacity and stability with high Fe 2+ may be due to poor cycling stability of iron silicate. 50 The rate capabilities of both Fe−SiO x @C and SiO x @C electrodes were also compared in Figure 4d. Reversible capacities of 568, 521, 498, and 354 mA h g −1 can be delivered for Fe−SiO x @C electrode at current densities of 0.5, 0.8, 1.0, and 2.0 A g −1 , respectively, showing greatly improved rate capability and enhanced electron/ion-migration kinetics compared with SiO x @C. When the current density was reset to 0.1 A g −1 , reversible capacities of 949.1 and 634.4 mA h g −1 can be recovered for Fe−SiO x @C and SiO x @C, respectively, indicating excellent structural integrity of both electrodes.…”

“…A high capacity of 851 mA h g –1 with a 91.9% retention rate after 200 cycles can be delivered for Fe–SiO x @C with ∼5% Fe 2+ modification, much higher than these of SiO x @C (85.0%) and bare SiO x (30.5%) electrodes (Figure S4), which can be attributed to the uniform carbon coating of SiO x and the successful Fe 2+ modification. The deterioration in both capacity and stability with high Fe 2+ may be due to poor cycling stability of iron silicate …”

Band gap of Fayalite for 5% Laterite Soil and Iron Sand Analysis from Theoretical Calculation of Kubelka–Munk equation, Taylor expansion, and Self-Consistent Field Method

“…Note that, since 1994, the USA and Chile, as nickel-producing countries, have reported that approximately 1.5-4 million tons of slag have been produced as a result of nickel production [3]. However, the combination of iron and non-magnetic materials in the fayalite structure will provide many applications such as absorbers [4], electro-chemicals [5], and infrastructure applications [6].…”