Guangqi Ouyang, Grace Whang, Emily MacInnis, S. Iyer
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Fabrication of Flexible Ionic-Liquid Thin Film Battery Matrix on FlexTrate™ for Powering Wearable Devices
To improve the flexibility of Li-ion batteries for powering wearables, we develop a simple battery interconnection method on FlexTrate™ to fabricate a thin-film flexible Li-ion battery matrix by using ionic liquid electrolyte, commercial lithium iron phosphate (LFP) cathode, and Li-metal anode. The mechanical fatigue process of the Li-ion cathode materials during is analyzed. The thin-film battery achieves 1.33 mAh/cm2 energy density at C/10 charging/discharging rate after 1000 times bending cycles at 5 mm bending radius.
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