Carbonized-leaf Membrane with Anisotropic Surfaces for Sodium-ion Battery

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• 作者：Hongbian Li ; Fei Shen ; Wei Luo ; Jiaqi Dai ; Xiaogang Han ; Yanan Chen ; Yonggang Yao ; Hongli Zhu ; Kun Fu ; Emily Hitz ; Liangbing Hu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 27, 2016
• 年：2016
• 卷：8
• 期：3
• 页码：2204-2210
• 全文大小：520K
• ISSN：1944-8252

文摘

A simple one-step thermal pyrolysis route has been developed to prepare carbon membrane from a natural leaf. The carbonized leaf membrane possesses anisotropic surfaces and internal hierarchical porosity, exhibiting a high specific capacity of 360 mAh/g and a high initial Coulombic efficiency of 74.8% as a binder-free, current-collector-free anode for rechargeable sodium ion batteries. Moreover, large-area carbon membranes with low contact resistance are fabricated by simply stacking and carbonizing leaves, a promising strategy toward large-scale sodium-ion battery developments.