Thermoconformable, Flexible Lithium-Ion Batteries
Authors/Creators
- 1. CIC energiGUNE
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2.
IMDEA Energy Institute
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3.
IMDEA Materials
- 4. IMDEA Materials Institute
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5.
Universidad Politécnica de Madrid
- 6. Grupo Antolin Ingeniería
Description
This work introduces a scalable method for fabrication of flexible, thermoconformable lithium-ion batteries, suitable for the interior of vehicles. Electrodes with a composite structure are fabricated by combining conventional granular slurries with a porous carbon nanotube fabric current collector and a solid gel polymer electrolyte. The composite structure reduces polarization at high current densities, for example, with 50% and 17% higher charge capacity at 1C in LTO/Li half cells than control samples and commercial electrodes, respectively. Introducing a gel-polymer electrolyte increases cell durability, safety, and thermal stability. Cyclability test at of 1C shows a capacity retention as high as 91% after almost 400 cycles (average capacity fade of 0.025% cycle−1). Full cells operate from 0 to 60 °C without any additives. Cells stored for 30 min up to 90 °C suffer minor capacity degradation. The possibility to withstand high temperatures and significant flexural deformation enable subjecting these pouch cells to thermoconformable processes. A roof panel with four 25 cm2 pouch cells is demonstrated. Flammability test shows that the carbon nanotube fibers (CNTF)-LFP/CNTF-LTO cells have a 50% lower peak of heat release rate and a much smaller total heat released than control cells with metallic current collector and liquid electrolyte.
Files
Boaretto, Davila et al 2022 - Thermoconformable batteries.pdf
Files
(3.2 MB)
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Additional details
Related works
- Is published in
- Journal article: 10.1002/admt.202101635 (DOI)
Funding
Dates
- Submitted
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2021-12-09
- Updated
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2022-02-07
- Available
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2022-03-25