Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 46, Pages 39794-39801Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b14797
Keywords
high areal energy and power density; paste extrusion; three-dimensional (3D) printing technique; 3D patterned thick LiFePO4 (LFP) electrodes; patternable 3D printing
Funding
- Natural Science Foundation of China (NSFC) [U1432249]
- National Key R&D Program of China [2017YFA0205002]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Research Chair Program (CRC)
- Canada Foundation for Innovation (CFI)
- University of Western Ontario (UWO)
- Collaborative Innovation Center of Suzhou Nano Science Technology
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High-energy and high-power-density lithium-ion batteries are promising energy storage systems for future portable electronics and electric vehicles. Here, three-dimensional (3D) patterned electrodes are created through the paste-extrusion-based 3D printing technique realizing a trade-off between high energy density and power density. The 3D electrodes possess several distinct merits over traditional flat thick electrodes, such as higher surface area, shorter ion transport path, and improved mechanical strength. Benefiting from these advantages, the 3D-printed thick electrodes present the higher specific capacity and improved cycling stability compared with those of the conventional thick electrodes. Upon comparison to the previous studies on 3D-printed electrodes, this study investigates the influence and optimization of 3D-printed LiFePO4 (LFP) electrodes with three different geometric shapes to achieve a high rate performance and long-term cycling stability. Accordingly, a series of 3D electrodes with different thickness were created, and an ultrathick (1500 mu m) 3D-patterned electrode exhibits a high areal capacity of around 7.5 mA h cm(-2), presenting remarkable value for state-of-the-art LFP cathodes. This work demonstrates patternable 3D printing as a potential strategy to fabricate thick electrodes toward high areal energy density and power density, which holds great promise for the future development of high-performance energy storage devices.
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