High Rate Capability Of Coconut Kernel Derived Carbon As An Anode Material For Lithium-ion Batteries

Abstract

Carbon has been prepared by pyrolysis of grated, milk-extracted coconut kernel at 600 º C under nitrogen atmosphere. The disordered carbon has sheet like morphology. The carbon exhibits a high reversible Li + intercalation capacity in a non-aqueous electrolyte. The initial charge and discharge capacities are 990 and 400 mAh g -1 , thus resulting in an irreversible capacity loss of 590 mAh g -1 . Nevertheless, subsequent discharge capacity is stable over a large number of charge-discharge cycles. The electrodes withstand charge-discharge currents as high as 1257 mA g -1 and they deliver discharge capacity of 80 mAh g -1 . Diffusion coefficient of Li + obtained from galvanostatic intermittent titration is 6.7 x 10 -12 cm 2 s -1 . Thus the coconut kernel derived carbon is a suitable anode material for Li-ion batteries.

Lignite-derived high surface area mesoporous activated carbons for electrochemical capacitors

“…As a high rank coal, the XRD of anthracite (Fig. 3a) shows a sharp peak at about 26°and a weak peak at about 43°, corresponding to the reflection in the (002) plane and (100) plane of aromatic layers [42], which indicates a predominantly microcrystalline graphitic structure present in the anthracite. Whereas, the lignite shows only a weak broad peak at around of 2θ = 15-30°compared with anthracite, indicating the stacking structure of aromatic layers in lignite is degraded with a relatively amorphous matrix, which is an advantageous property for preparation of highly porous surface ACs.…”

Selective H2O2 Electrosynthesis over Defective Carbon from Electrochemical Etching of Molybdenum Carbide

“…This indicates that molybdenum carbide has been successfully prepared. Mo-CDC-ns show a significantly attenuated diffraction peak of Mo 2 C but ever-increasing intensity of peaks at 18.2 and 22.4°, which are ascribed to functionalized or disordered graphitic carbon. ,, These results suggest that the Mo 2 C phase in Mo-CDC-ns decreases continuously until it disappears during the ECA process, and the remained carbon might be converted to the defective carbon structure.…”

Hydrogen Production through Glycerol Photoreforming on TiO2/Mesoporous Carbon: Influence of the Synthetic Method

“…21-1276) [ 45 , 46 ]. As for the commercial mesoporous carbon (MC), the broad and relatively low-intensity reflections at 23° (002) and 43° (100) associated with the degree of graphitization of the carbon indicate the disordered nature of the carbonaceous material [ 47 , 48 ], which is not significantly affected by the acid treatment. Raman spectroscopy is a more sensitive technique that can provide additional information in this regard.…”