alpha-Fe2O3 lithium battery anodes by nanocasting strategy from ordered 2D and 3D templates
Résumé
Nanocasting strategy is here proposed as effective approach to tune
structure and size of alpha-Fe2O3 active nanoparticles as a promising
anode material for Li-ion cells. MCM-41 and MCM-48 silicas, presenting
hexagonal 2D and cubic 3D symmetry, respectively, and regular pore
diameter of about 4 nm are selected as moulds. The
structural-morphological and electrochemical characteristics are
assessed by X-ray diffraction, transmission electron microscopy, N-2
physisorption at 77 K, cyclic voltammetry and galvanostatic
discharge/charge cycling. It is here demonstrated that
structural-morphological features change accordingly to the template
used and careful control of the texture/particle characteristics is
likely a fundamental variable noticeably affecting the cycling
behaviour. (C) 2013 Elsevier B.V. All rights reserved.