Facile fabrication of cross-linked carbon nanofiber via directly carbonizing electrospun polyacrylonitrile nanofiber as high performance scaffold for supercapacitors

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• 作者：Guobin Xue^a ; Jiang Zhong^a ; Yongliang Cheng^a ; ^b ; ^{ylchenghust@hust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Bo Wang^a ; ^{bowang@whu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{bowangpositron@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：carbon nanofibers ; supercapacitor ; positron
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 October 2016
• 年：2016
• 卷：215
• 期：Complete
• 页码：29-35
• 全文大小：2115 K

文摘

Cross-linked carbon nanofiber (CLCNF) was successfully prepared by directly carbonizing electrospun polyacrylonitrile (PAN) nanofiber. Comparing to non-cross-linked carbon nanofiber (NCLCNF) obtained via carbonizing of pre-oxidation PAN nanofiber, CLCNF shows better conductivity owing to its cross-linked structure. Then CLCNF was used as scaffold to support polyaniline (PANi) nanorods for supercapacitor electrode material. The hierarchical CLCNF/PANi composite displays a capacity of 206C g⁻¹ at 0.5 A g⁻¹ with excellent rate capability (remains 49% even at 800 A g⁻¹), which is much higher than that of NCLCNF/PANi composite (17%). More interestingly, supercapacitor device based on CLCNF/PANi composite achieves 75.3% capacity retention after 10000 charge-discharge cycles at 10 A g⁻¹, suggesting excellent cycle stability. All these experimental results indicate that this method for fabricating CLCNF is a substantial advancement towards the practical applications of carbon nanofiber in energy conversion and storage field.