Journal
VIRTUAL AND PHYSICAL PROTOTYPING
Volume 15, Issue -, Pages 511-519Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17452759.2020.1842619
Keywords
3D printing; direct ink writing; micro-supercapacitor; energy storage; flexibility
Funding
- National Natural Science Foundation of China [51802292, 21975230]
- Hubei Science and Technology Innovation Project [2018AAA015, 2017AAA112]
- Zhejiang Provincial Natural Science Foundation of China [LY20B010001]
- Marine and Offshore Program
- Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore
- Fundamental Research Funds for the Central Universities [CUG170690]
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Micro-supercapacitors (MSCs) with excellent electrochemical behaviours and flexibility possess great promise for portable and wearable electronic devices. A novel type of hybrid-dimensional Fe2O3/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 mu Wh 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 Fe2O3 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.
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