Polyaniline hollow nanofibers prepared by controllable sacrifice-template route as high-performance cathode materials for sodium-ion batteries

• Published in: Electrochimica acta Vol. 301; pp. 352 - 358
• Main Authors: Han, Haixia, Lu, Haiyan, Jiang, Xiaoyu, Zhong, Faping, Ai, Xinping, Yang, Hanxi, Cao, Yuliang
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.04.2019; Elsevier BV
• Subjects: Cathode; Cathodes; Cathodic dissolution; Chemical synthesis; Conducting polymers; Control stability; Dissolution; Drug delivery systems; Electrochemical analysis; Electrode materials; Energy storage; Hollow nanofibers; Microreactors; Morphology; Nanofibers; Organic chemistry; Polyaniline; Polyanilines; Polymethyl methacrylate; Rechargeable batteries; Sacrifice-template; Sodium ion batteries; Structural stability; Sodium ion batteries; Hollow nanofibers; Sacrifice-template; Polyaniline; Cathode
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2019.02.002

Polyaniline hollow nanofibers (PANI-HNFs) are successfully synthesized by using poly (methyl methacrylate) nanofibers as a sacrifice-template via an in-situ polymerization with a subsequent dissolution process. The polyaniline hollow nanofibers as cathode material for sodium-ion batteries exhibit a high reversible capacity of 153 mA h g−1 at 0.3 C (1C = 150 mA g−1), high cycling stability (73.3% capacity retention after 1000 cycles) and rate capability (70 mA h g−1 at 8 C). The high electrochemical performance of the polyaniline hollow nanofibers originates from the one dimension hollow nanostructures with unique morphologies and highly reversible doping/dedoping property of the conducting polymer, so as to ensure well structural stability and good electrical/ionic conducting connectivity. Furthermore, this strategy can controllably prepare various hollow one dimension structures with different tube diameters and wall sizes, which has potential application for energy storage materials, catalysts, drug-delivered materials and chemical microreactors. [Display omitted] •PANI-HNFs are synthesized via a sacrifice-template method.•PANI-HNFs exhibits a high reversible capacity, cycling stability and rate capability.•The unique hollow fiber structure can be widely applied in other fields.