Large Areal Mass and High Scalable and Flexible Cobalt Oxide/Graphene/Bacterial Cellulose Electrode for Supercapacitors

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• 作者：Rong Liu ; Lina Ma ; Shu Huang ; Jia Mei ; Enyuan Li ; Guohui Yuan
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：December 22, 2016
• 年：2016
• 卷：120
• 期：50
• 页码：28480-28488
• 全文大小：708K
• ISSN：1932-7455

文摘

Flexible energy storage devices require a simple, scalable and general strategy for fabricating high electrochemical performance and mechanically tough flexible electrodes. Herein, sustainable and biological bacterial cellulose (BC) is developed as substrate for Co₃O₄/graphene (GN), which permits high flexibility (suitable for bending angle of 180°), excellent tensile strength of 63 MPa, good wettability, and especially large mass loading of 9.61 mg cm^–2 for a flexible and free-standing supercapacitor electrode. The Co₃O₄/GN/BC hybrid electrode exhibits both appreciable areal capacitance of 12.25 F cm^–2 and gravimetric capacitance of 1274.2 F g^–1. Moreover, the remarkable cycling stability with 96.4% capacitance retention after 20000 can be achieved. This study provides a facile procedure to improve the electrochemical performance and mechanical property of flexible supercapacitor electrodes, which are promising candidates for the application of a flexible power source.