Enabling a High Performance of Mesoporous α-Fe2O3 Anodes by Building a Conformal Coating of Cyclized-PAN Network

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• 作者：Di Wang ; Hui Dong ; Huang Zhang ; Yang Zhang ; Yunlong Xu ; Chongjun Zhao ; Yunong Sun ; Nan Zhou
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 3, 2016
• 年：2016
• 卷：8
• 期：30
• 页码：19524-19532
• 全文大小：709K
• 年卷期：0
• ISSN：1944-8252

文摘

The mesoporous α-Fe₂O₃/cyclized-polyacrylonitrile (C-PAN) composite was synthesized by a rapid and facile two-step method. The electrode was fabricated without conductive carbon addictive and employed as anode for lithium-ion batteries. Results demonstrate that building a conformal coating of a C-PAN network can provide a strong adhesion with active materials and contribute excellent electronic conductivity to the electrode, which can relieve the huge volume changes during a lithiation/delithiation process and accelerate the charge transfer rate. The material exhibited high reversible capacity of ca. 996 mAh g^–1 after 100 cycles at 0.2C, 773 mAh g^–1 at 1C and 655 mAh g^–1 at 2C, respectively, showing well-enhanced cycling performance and superior rate capacity, and also exhibiting significantly improved power density and energy density compared to the traditional graphite materials. Our results provide a facile and efficient way to enhance the performance of α-Fe₂O₃ anode material, which also can be applied for other oxide anode materials.