▎ 摘　　要

Sodium metal anode has been attracting widely research attention due to its large capacity and low electrode potential as the anode of sodium-ion batteries. However, the uncontrollable growth of Na dendrite is one of the critical issues for its real applications. Herein, a three-dimensional (3D) nanostructure composed of gold nanoparticles (Au NPs) supported on 3D carbon nanotube-graphene foam (3D CNT-GF) was designed and fabricated as the host of sodium metal anode. Na@3D Au/CNT-GF anode can deliver a Coulombic efficiency of 99.14% and stably cycle for 2600 h at 1 mA cm -2 with 1 mAh cm -2 . It can cycle for 300 h at 5 mA cm -2 with 1 mAh cm -2 . Detailed results indicate that its excellent electrochemical performance can be attributed to the unique macroporous structure and sodiophilic surface formed by Au NPs guiding the uniform sodium metal deposition enabled a dendrite-free morphology investigated by the ex-situ SEM and in-situ optical microscopy. At last, a full cell was assembled with Na@3D Au/CNT-GF as the anode and Na 3 V 2 (PO 4 ) 3 @C as the cathode. It can deliver a capacity of 84.6 mAh g -1 at 100 mA g -1 after 200 cycles. Our results demonstrate that 3D Au/CNT-GF is a promising sodium metal anode host. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.