3D printed hybrid-dimensional electrodes for flexible micro-supercapacitors with superior electrochemical behaviours. (8th December 2020)

• Record Type: Journal Article
• Authors: Tang, Kang; Ma, Hui; Tian, Yujia; Liu, Zixian; Jin, Hongyun; Hou, Shuen; Zhou, Kun; Tian, Xiaocong
• Is Part Of: Virtual and physical prototyping. Volume 15(2020)Supplement 1
• Page Start: 511
• Page End: 519
• Publication Date: 2020-12-08
• Subjects: 3D printing -- direct ink writing -- micro-supercapacitor -- energy storage -- flexibility; Rapid prototyping -- Periodicals; Virtual computer systems -- Periodicals; Prototypes, Engineering -- Periodicals; Production engineering -- Periodicals; Design, Industrial -- Periodicals; 670.285
• DOI: 10.1080/17452759.2020.1842619
• Languages: English
• ISSNs: 1745-2759

Abstract

ABSTRACT: Micro-supercapacitors (MSCs) with excellent electrochemical behaviours and flexibility possess great promise for portable and wearable electronic devices. A novel type of hybrid-dimensional Fe2 O3 /graphene/Ag ink is developed and extruded into MSC electrodes through the direct ink writing-based three-dimensional (3D) printing. The optimal solid-state MSC device exhibits a maximum areal capacitance of 412.3 mF cm −2 at 2 mA cm −2, a correspondingly high energy density of 65.4 μWh cm −2 and 89% capacitance retention for over 5000 charge and discharge cycles. The superior electrochemical performance is profited by the high electron transport synergistically boosted by two-dimensional graphene nanosheets and one-dimensional Ag nanowires, and the high pseudocapacitive behaviours of Fe2 O3 nanoparticles. The 3D printed MSC exhibits reliable flexibility with remarkable retention of 90.2% of its original capacitance after 500 bending cycles. The current 3D printing fabrication demonstrates an efficient route for advanced miniaturised electrochemical energy storage.