The composition of the as-synthesized Na3V2(PO4)3 powder was determined by elemental analysis using ICP-OES. The Na/V/P ratio was found to be 3.03(2):1.97(3):2.99 (6), suggesting that the target composition Na3V2(PO4)3 was achieved through the sol-gel-assisted solidstate reaction. SEM images of the Na3V2(PO4)3 powder (Figure ) show that the particles have no particular shapes as similar to other studies. However, relatively large agglomerates ranging from few microns to several tenths of microns were found with the primary particles in the size of a few hundreds of nanometers. The powder is carbon-coated on the surface, ca. 9 wt% of carbon as determined by TGA measurements in air, shown in