An aqueous mixture of poly(vinyl alcohol) (M.W. similar to 8.9 x 10(4)-9.8 x 10(4) g mol(-1), 14% w/v) and disodium terephthalate (Na2TP) powders (6% w/v) was electrospun at 14 kV with a fiber collection distance and a feed rate of 12 cm and 0.5 mL h(-1). Then, the obtained fibers were calcined at 350 degrees C with a heating rate of 1 degrees C min(-1) under air for 7 h. Diameters of hollow Na2TP fibers, composed of grains with sizes of 76 +/- 27 nm, are 189 +/- 32 nm. Na2TP fibers are composed of similar to 16% w/w Na2CO3. Na2TP structure is orthorhombic and can be indexed in a space group of Pbc2(1). Degree of crystallinity of Na2TP fibers is less than that of Na2TP powders. Galvanostatic curves display stable reversible capacities of Na2TP powders and fibers at similar to 140 mA h g(-1) and similar to 110 mA h g(-1), respectively, after 50 cycles at 25.5 mA g(-1). On the other hand, at 255 mA g(-1) and after 100 cycles, those of the powders and the fibers are similar to 48 mA h g(-1) and similar to 70 mA h g(-1), respectively. Thus, the eco-friendly Na2TP fibers are potentially used as anode materials of sodium-ion batteries under high current density. (C) 2018 The Electrochemical Society.