▎ 摘　　要

Hierarchical porous structure plays a vital role in various energy storage systems. Herein, a wood-inspired multi-channel tubular graphene (MCTG) architecture is fabricated by template-directed chemical vapor deposition (CVD). The multi-channel template is assembled via a facile hydrothermal and freeze-drying method with Si as precursor. The unique multi-channel tubular graphene architecture reveals distinct advantages for lithium-sulfur (Li-S) batteries. The curved tubular interior space with a pore volume of 2.141 cm(3) g(-1) can accommodate active sulfur and anchor soluble polysulfides, while the 3D multi-channel network favors rapid mass transport and ion diffusion. Furthermore, the CVD grown few-layer graphene offers good electron conductivity, while the enlarged (002) spacing (0.35-0.41 nm) of graphene layers provide more space for sulfur storage and Li+ diffusion. Benefiting from these merits, the MCTG/S cathode (loaded with 70 wt% sulfur) achieves a high initial discharge capacity of 1390 mAh g(-1) at 0.1 C rate, excellent rate capability up to 8 C and a slow capacity decay rate of 0.078% per cycle during 500 cycles. This type of MCTG will also play an important role in gas adsorption, solar steam generation, catalysis, and so on. (C) 2018 Published by Elsevier Ltd.