General formation of Prussian blue analogue microtubes for high-performance Na-ion hybrid supercapacitors

投稿的翻译标题: 类普鲁士蓝空心微米管的通用性制备及其作为高性能非对称超级电容器的研究

Xuemin Yin, Hejun Li, Ruimei Yuan, Leilei Zhang, Jinhua Lu

科研成果: 期刊稿件文章同行评审

40 引用 (Scopus)

摘要

One-dimensional (1D) hollow-structured nanomaterials with desirable compositions have aroused huge attention in the field of electrochemical energy storage. In the present study, 1D hierarchical cobalt hexacyanoferrate (CoHCF) microtubes were initially fabricated using a facile self-templated method with the electrospun polyacrylonitrile (PAN)-cobalt acetate (Co(Ac)2) as templates. After the chemical reaction was performed between the templates and a potassium ferricyanide solution, the core-shell PAN-Co(Ac)2@CoHCF nanofibers were successfully fabricated. Subsequently, the CoHCF microtubes were finally obtained via the selective dissolution of the PAN-Co(Ac)2 cores. Benefiting from the unique structural characteristic, the CoHCF microtubes electrode exhibited prominent electrochemical characteristics in Na2SO4 aqueous electrolyte, including a high specific capacitance of 281.8 F g−1 (at 1 A g−1), and good rate capability as well as long cycling stability (93% capacitance retention after 5000 cycles). The hybrid supercapacitor assembled with CoHCF microtubes and activated carbon (AC) as the positive and negative electrodes, respectively, exhibited a high energy density of 43.89 W h kg−1, a power density of 27.78 kW kg−1, as well as a long cycle life. Note that this versatile self templated synthetic strategy could be extended to fabricate other 1D hollow Prussian blue (PB) or its analogues (PBA) with controllable composition, which have a potential application in a range of fields.

投稿的翻译标题类普鲁士蓝空心微米管的通用性制备及其作为高性能非对称超级电容器的研究
源语言英语
页(从-至)739-747
页数9
期刊Science China Materials
63
5
DOI
出版状态已出版 - 1 5月 2020

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