Abstract
Bamboo-structured carbon nanotubes (CNTs) and three-dimensional honeycomb carbons (HCs) have been prepared by the reduction pyrolysis by metallic zinc of tetrahydrofuran and glycerol, respectively. Comparative experiments showed that in situ generated zinc oxide, serving as a catalyst or template, was responsible for the formations. Galvanostatic discharge/charge evaluation revealed that both the CNTs and HCs exhibited a long-cycle Li-storage performance. The HCs can deliver a reversible capacity of 257mAh/g after 150 cycles at a current density of 50mA/g. For bamboo-structured CNTs, a higher reversible capacity of 518mAh/g is achieved after 390 cycles at a current density of 200mA/g. This confirms the great influence of carbon microstructure on the Li-storage performance.
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