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

作者：Liu, Rong; Ma, Lina; Huang, Shu; Mei, Jia; Li, Enyuan; Yuan, Guohui^*

来源：Journal of Physical Chemistry C, 2016, 120(50): 28480-28488.

DOI：10.1021/acs.jpcc.6b10475

• CORE-SHELL NANOSTRUCTURES
• ASYMMETRIC SUPERCAPACITORS
• BACTERIAL CELLULOSE
• ENERGY-STORAGE
• PERFORMANCE
• GRAPHENE
• CO3O4
• PAPER
• HYBRID
• PSEUDOCAPACITORS

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 degrees), 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.

• 出版日期2016-12-22
• 单位哈尔滨工业大学