Three-dimensional macroporous graphene/TiO₂ nanocomposite as anode material for lithium ion batteries

A simple method based on alternating heating–quenching cycles is exploited to synthesize a three-dimensional (3D) macroporous graphene structure that is characterized by a hierarchically interconnected flexible network of high-quality graphene nanosheets with few oxygen-containing moieties. The structure can be employed as a suitable scaffold to load functional nanoparticles and as a fast transport channel for charge carriers. As a proof of concept, we fabricate novel graphene/P25 nanocomposites that are examined as stable high-performance anode materials for lithium ion batteries; the prepared nanocomposites feature excellent electrochemical performance with a capacity as high as 120 mA h g⁻¹after 100 cycles that is ∼ 4.8 times larger than that of bare P25.