Nanosized CaSnO3 is synthesized by a hydrothermal process and characterized by X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). The SEM observation shows the sample has a porous flowerlike morphology. The electrochemical results exhibit that the stable and reversible capacity of 547 mAh g(-1) is obtained after 50 cycles at 60 mA g(-1) (0.1 C) and the corresponding charge capacity is determined to be 316 mAh g(-1) at the current density of 2.5 C. Cyclic voltammetry and electrochemical impedance spectroscopy data are analyzed to complement the galvanostatic results. The observed excellent performance is attributed to the porous structure and large surface area of flowerlike CaSnO3. (C) 2010 Elsevier Ltd. All rights reserved.