Preparation of Si-based composite encapsulated by an incomplete multifunction-coating for lithium storage

In this work, a smart architecture ([email protected]@[email protected]2) with hierarchical micro/mesopores is fabricated by in situ construction. Anatase-TiO2 particles are self-assembly anchored on the [email protected]@C and some are potentially filling into the large mesopores of [email protected]@C and then form incomplete cover followed by annealing. The unique cooperative coating not only offers stronger protections on account of TiOC bond which increases the adhesion, but also optimizes the distribution of micro/mesopores, and thus provides fast electrons/ions transportation channels to active materials. As a consequence, the unique structure endows the electrode better rate capability and more superior cycling stability with 0.11% decay per cycle than [email protected]@C (0.30% decay per cycle), manifesting the dominance of the incomplete cover for Si-based anodes.