Here, we report our studies on the crystal structures, morphologies, and superconductivity in LaFeAsO1-xFx compounds which were fabricated by solid state reaction. The crystal structures were refined using Rietveld refinement. Superconducting properties, such as critical temperature, T-c, critical current density, J(c), and upper critical field, H-c2, were determined using magneto-transport and magnetic measurements over a wide range of temperature below and above T-c, and in magnetic fields up to 14 T. A peak effect in the J(c) versus field is observed at T<15 K. Upper critical field in the ab and c directions is H-c2(ab) = 122.8 T and H-c2(c) = 38.6 T, respectively. (C) 2010 Elsevier B.V. All rights reserved.