Controllable synthesis of CaTi2O4(OH)2 nanoflakes by a facile template-free process and its properties

Serrated leaf-like CaTi2O4(OH)(2) nanoftake crystals were synthesized via a template-free and surfactant-free hydrothermal process. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The growth process for CaTi2O4(OH)(2) nanoflakes was dominated by a crystallization-dissolution-recrystallization growth mechanism. BET analysis showed that CaTi2O4(OH)(2) nanoflakes had mesoporous structure with an average pore size of 8.7 nm, and a large surface area of 88.4 m(2) g(-1). Cyclic voltammetry and galvanostatic charge discharge tests revealed that the electrode synthesized from CaTi2O4(OH)(2) nanollakes reached specific capacitances of 162 F g(-1) at the discharge current of 2 mA cm(-2), and also exhibited excellent electrochemical stability. Published by Elsevier Ltd and Techna Group S.r.l.