Journal
JOURNAL OF POWER SOURCES
Volume 494, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229625
Keywords
3D printing; PLA; Lithium iron phosphate; Carbon nanotube; Li-ion battery; Specific capacity
Funding
- Abu Dhabi National Oil Company [EX2016000010]
Ask authors/readers for more resources
The study investigates microarchitected cathodes composed of PLA/LFP/CNT enabled by 3D printing, showing that increasing porosity can enhance specific capacity without affecting areal capacity. This technology has the potential to advance the development of high-capacity, fast-charging lithium-ion batteries.
The growing need for higher capacity, faster charging-rate, longer cycle-life, and less expensive Li-ion batteries (LIBs) requires architectured cathodes and novel manufacturing strategies. Herein, we report the charge/discharge performance of microarchitected, hierarchically porous nanocomposite cathodes, composed of biodegradable polylactic-acid (PLA)/LiFePO4 (LFP)/carbon nanotube (CNT) enabled by 3D printing. We realize LFP/PLA/CNT cathodes with different CNT loadings (3, 5, 7, and 10 wt%), interconnected porosities (10%, 30%, 50%, and 70%) and thicknesses (100, 200 and 300 ?m) by utilizing in-house nanoengineered filaments. The nanocomposite cathodes exhibit a specific capacity of 155 and 127 mAh g-1 and an areal capacity of 1.7 and 4.4 mAh cm-2 for 100 and 300 ?m thick electrodes, respectively, at 0.39 mA cm-2. Moreover, we observe that the specific capacity of the thicker electrode (300 ?m) enhances from 125 to 151 mAh g-1 without any loss in areal capacity with increase in porosity. The results demonstrate that the effect of thickness on the specific capacity can be negated by engineering desired porosity, and thereby specific and areal capacities can simultaneously be enhanced. The convergence of emerging nanoscale additive manufacturing and the ability to design ever-more-tightly controlled nano- and microarchitected hierarchical structures will enable the creation of high-performance LIBs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available