Flexible solid-state supercapacitor based on tin oxide/reduced graphene oxide/bacterial nanocellulose.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Flexible and lightweight energy storage devices are crucial for portable electronics.
• Bacterial nanocellulose (BNC) offers a promising sustainable platform for energy storage applications.
• Integrating nanomaterials can enhance the electrochemical performance of BNC-based devices.

Purpose of the Study:

• To develop a novel flexible supercapacitor using bacterial nanocellulose (BNC) integrated with tin oxide (SnO2) nanoparticles and graphene oxide (GO).
• To evaluate the electrochemical performance and cycling stability of the fabricated supercapacitor electrodes.
• To demonstrate a scalable fabrication method for cellulose-based flexible energy storage devices.

Main Methods:

• Incorporation of SnO2 nanoparticles and GO flakes into a BNC matrix during bacteria-mediated synthesis.
• Fabrication of flexible electrodes using PEDOT:PSS/SnO2/rGO/BNC.
• Assembly of flexible solid-state supercapacitors with a PVA-H2SO4 coated BNC separator.

Main Results:

• The PEDOT:PSS/SnO2/rGO/BNC electrodes demonstrated high capacitance of 445 F g-1 at 2 A g-1.
• Outstanding cycling stability was achieved, with 84.1% capacitance retention over 2500 charge/discharge cycles.
• The fabricated solid-state supercapacitors exhibited excellent energy storage performance.

Conclusions:

• A flexible and lightweight supercapacitor based on BNC, SnO2, and GO was successfully fabricated.
• The developed material shows significant potential for advanced flexible energy storage applications.
• The scalable fabrication method opens new avenues for sustainable cellulose-based electronic devices.