Three dimensionals 伪-Fe₂O₃/polypyrrole (Ppy) nanoarray as anode for micro lithium ion batteries

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• 作者：Jilei Liu ; Weiwei Zhou ; Linfei Lai ; Huanping Yang ; San Hua Lim ; Yongda Zhen ; Ting Yu ; Zexiang Shen ; Jianyi Lin
• 关键词：Three dimensional ; 伪-Fe2O3/Ppy ; Nanoarray ; Anode ; Li-ion battery
• 刊名：Nano Energy
• 出版年：September, 2013
• 年：2013
• 卷：2
• 期：5
• 页码：726-732
• 全文大小：3962 K

文摘

Three dimensional, self-supported 伪-Fe₂O₃/Ppy composite electrode with enhanced specific areal capacity and rate performance was successfully fabricated by a simple, low-cost, two-steps process consisting of direct heating of iron foil in air and subsequent coating of conducting polymer Ppy on the 伪-Fe₂O₃ nanoflakes. By using 伪-Fe₂O₃/Ppy as the anode materials with iron foil as the current collector, the unique structure affords a highly conductive pathway for electron, a short diffusion length for ions, a fast mass transport channel for electrolyte, and sufficient void space for accommodating large volume variations during Li intercalation/diintercalation for Li-ion battery. A relatively high specific capacity of 0.42 mA h/cm² can be achieved at 0.1 mA/cm² even after 100 charge/discharge cycles, with a plateau potential of 1 V and nearly 100% Coulombic efficiency, suggesting the feasibility to use this unique 3D nanostructured hybrid composite for microbattery in both small and large scale applications.