Investigation of MgTiO3 as an anode material for rechargeable Li-ion batteries

Magnesium Titanate (MgTiO3) is a common and commercially available dielectric material used in electronics applications. The potential of using MgTiO3 as an anode material in rechargeable Li-ion batteries has been investigated under this study. MgTiO3 particles were synthesized by both wet-chemical Pechini method and solid state ball milling method. The subsequent material characterizations were carried out using X-ray diffraction and scanning electron microscopic techniques. The electrochemical performance of MgTiO3 as an anode material in Li-ion rechargeable battery was carried out with Li metal electrode in coin half cells. For wet-chemically synthesized MgTiO3, the potentials associated with lithiation were 1.14 V and 0.76 V vs Li/Li+ with an initial discharge capacity of 103 mAh/g at C/10 rate. Lithiation potential for ball milled MgTiO3 was found to be at 1.3 V vs Li/Li+ with an initial discharge of 63 mAh/g cycled at C/10 rate

Performance of developed natural vein graphite as the anode material of rechargeable lithium ion batteries

Electrochemical performance of natural vein graphite as an anode material for the rechargeable Li-ion battery (LIB) was investigated in this study. Natural graphite exhibits many favorable characteristics such as, high reversible capacity, appropriate potential profile, and comparatively low cost, to be an anode material for the LIB. Among the natural graphite varieties, the vein graphite typically possesses very high crystallinity together with extensively high natural purity, which in turn reduces the cost for purification. The developed natural vein graphite variety used for this study, possessed extra high purity with modified surface characteristics. Half-cell testing was carried out using CR 2032 coin cells with natural vein graphite as the active material and 1 M LiPF6 (EC: DMC; vol. 1:1) as the electrolyte. Galvanostatic charge–discharge, cyclic voltammetry, and impedance analysis revealed a high and stable reversible capacity of 378 mA h g−1, which is higher than the theoretical capacity (372 mA h g−1 for LiC6). Further, the observed low irreversible capacity acquiesces to the high columbic efficiency of over 99.9%. Therefore, this highly crystalline developed natural vein graphite can be presented as a readily usable low-cost anode material for Li-ion rechargeable batteries

Na₂Ti₃O₇ nano fibres as an anode material for rechargeable Na-ion batteries

Na2Ti3O7 has been known for a long time and studied for several applications in sensors, catalysis and in toxic waste removal. The applicability of Na2Ti3O7 as an anode material for rechargeable Na-ion batteries was investigated in this study. Na2Ti3O7 nano fibers were synthesized by hydrothermal technique and characterized by using X-ray diffraction and scanning electron microscopy. The results show that spherical Na2Ti3O7 materials consisting of tiny nano fibers have been formed. The electrochemical characterization was performed with Na metal electrode in coin half-cells fabricated in an Ar inert atmosphere. The galvanostatic charge-discharge measurements in the voltage range of 0.02 - 1.9 V revealed the initial discharge capacity of 787.2 mAhg-1 at C / 10 rate and the discharge capacity was decreased to 55 mAhg-1 over 30 cycles. The results suggest that the crystalline Na2Ti3O7 nano fibers are suitable to be used as an anode material in rechargeable Na-ion batteries