▎ 摘　　要

A freestanding film electrode comprising face-to-face alternately stacked 2D TiO2 nanosheets and reduced graphene oxide (rGO) is designed and fabricated as a binder-free anode for lithiumion batteries. The ultrathin TiO2 nanosheets, with (001) facets exposed were face-to-face hetero-assembled onto the conductive rGO, allowing Li+ to swiftly diffuse into the TiO2 nanosheets across the (001) facets with the lowest barrier and a short transfer distance. The configuration of this planar-aligned electrode leads to superior lithium performance, which delivers a large capacity of 132.3 mA h g(-1) with a capacity retention of 89% over 1000 cycles at a high rate of 20 C (1 C=168 mA g(-1)). This work proves that controlling the arrangement orientation of electrode materials with an anisotropy Li+ diffusion barrier could remarkably improve the electrochemical properties, for promising applications in high-power energy-storage devices.