Cover page describe the Typical fracture surface of nuclear graphite blocks after irradiation (cracks occur during reactor operation). This picture Summarize the Fractographic studies of GR-280 nuclear graphite after irradiation up to neutron fluence above the turnaround dose (with a decrease in of the mechanical properties to the values close to the initial one after primary radiation-induced increase) showed along with the presence of transcrystalline fracture, appearance of intercrystalline fracture regions along the “filler-binder” type boundaries.
Naphthol bis-indole derivative as an anode material for aqueous rechargeable lithium ion battery
R. Anil Kumar2, R. Vijeth Shetty1, 2, G. S.Suresh1*, K. M. Mahadevan2*
1Department of Chemistry and Research Centre, NMKRV College for Women, Jayanagar, Bangalore 560011, Karnataka, India
2Department of Studies and Research in Chemistry, Kuvempu University, PG-Centre, Kadur 577548, Karnataka, India
Adv. Mater. Lett., 2018, 9 (11), pp 823-830
Publication Date (Web): Jul 25, 2018
Copyright © 2019 VBRI Press
Aqueous or non-aqueous rechargeable lithium ion batteries with organic electrodes as a current carrier can perform effectively sensible and affordable energy storage devices due to large accessibility of organic materials. Here we report a high-performance lithium-based energy storage device using 3,3'-(naphthalen-1-ylmethanediyl)bis(1H-indole) (NBI) as anode material for Aqueous Rechargeable Lithium-ion Battery. The active material is synthesized by condensation between indole and naphthaldehyde under stirring in glacial acetic acid, followed by lithiation by ball milling method. The obtained samples have been characterized by the combination of elemental analysis, NMR, FT-IR and powder XRD. The electrochemical measurements show that the cell Li-NBI | Sat. Li2SO4 | LiFePO4 has been delivered an initial discharge capacity of 113 mAh g−1 at lower current density. At the high current density 75 mAh g−1 discharge capacity can be achieved, which represents its high rate capability. Consequently, the as-prepared Li-NBI could be a potential active species as low-cost anode materials for lithium batteries. The kinetics of electrode reactions under saturated Li2SO4 have been studied by Potentiostatic Electrochemical Impedance Spectroscopic method, show the semi-infinite behaviour at peak potentials. These considerations may be rendering the effective rate performance during charge/discharge process.
Aqueous rechargeable lithium-ion battery, cyclic voltammetry, galvanostatic charge potential limit, potentiostatic electrochemical impedance spectroscopy.